Scaphoid Osteonecrosis (Preiser’s disease)

1. High-Yield Summary

• Core Pathology: Preiser’s disease represents rare idiopathic avascular necrosis (AVN) of the scaphoid occurring in the absence of a preceding acute fracture or established nonunion, characterized by osteocyte death, trabecular microfracture, structural collapse, and progressive secondary radiocarpal osteoarthritis.
• Vascular Vulnerability: The scaphoid relies predominantly on retrograde arterial perfusion from the dorsal carpal branch of the radial artery, which enters through the dorsal ridge and supplies 70% to 80% of the proximal pole, leaving the proximal pole entirely reliant on intraosseous microcirculation without direct ligamentous blood supply.
• Diagnostic Gold Standard: Magnetic resonance imaging (MRI) is the definitive modality for early (pre-radiographic) diagnosis, demonstrating decreased T1 signal and increased T2/STIR bone marrow edema, while thin-cut computed tomography (CT) is mandatory to assess cortical collapse, fragmentation, and carpal alignment.
• Morphologic Stratification: Disease patterns are classified chronologically by Herbert and Lanzetta (Stages 1 to 4) and anatomically by Kalainov (Type 1: generalized/diffuse scaphoid involvement vs. Type 2: localized proximal pole osteonecrosis).
• Management Paradigm: Pre-collapse disease with preserved articular cartilage (Herbert Stages 1 and 2) is managed with joint-preserving revascularization via pedicled vascularized bone grafts (such as the 1,2-intercompartmental supraretinacular artery [1,2-ICSRA]) or free medial femoral condyle (MFC) corticocancellous flaps; post-collapse disease with cartilage fragmentation or radioscaphoid arthrosis (Herbert Stages 3 and 4) necessitates motion-preserving salvage via proximal row carpectomy (PRC) or scaphoid excision and four-corner arthrodesis (4CA).

2. Anatomy

The scaphoid bone is the critical mechanical link between the proximal and distal carpal rows, spanning both columns and dictating carpal kinematics during radiocarpal flexion-extension and radial-ulnar deviation.

Vascular Architecture and Critical Perfusion Watersheds

The scaphoid is 80% covered by hyaline articular cartilage, severely constraining the surface area available for nutrient vascular penetration. Its arterial perfusion is characterized by an asymmetric, retrograde blood supply:

• Dorsal Radial Supply: The dorsal carpal branch of the radial artery provides the dominant arterial inflow, penetrating the scaphoid along the dorsal non-articular ridge or waist. This vascular pedicle provides 70% to 80% of the intraosseous blood flow, coursing in a retrograde direction from distal-to-proximal to nourish the proximal pole.
• Volar Tuberosity Supply: The superficial palmar branch of the radial artery penetrates the distal scaphoid tuberosity, supplying the remaining 20% to 30% of the bone volume confined largely to the distal pole.
• Proximal Pole Watershed: The proximal pole lacks direct extraosseous ligamentous or capsular arterial vessels and depends exclusively on retrograde intraosseous flow through narrow, cancellous bony channels. Any microvascular thrombosis, elevated intraosseous pressure, or microtrabecular structural collapse jeopardizes proximal pole viability.
• Donor Vascularized Graft Corridors: The 1,2-intercompartmental supraretinacular artery (1,2-ICSRA) runs on the dorsoradial aspect of the distal radius between the first and second extensor compartments and serves as the primary local pedicle for dorsal revascularization. Additional local options include the 2,3-ICSRA and the volar carpal artery pedicle (Kuhlmann graft). When generalized osteonecrosis (Kalainov Type 1) requires structural reconstruction, the descending genicular artery or superomedial genicular artery of the medial femoral condyle (MFC) provides a high-flow free microvascular transfer.

Internervous Planes and Operative Corridors

Surgical access to the scaphoid requires distinct dorsal or volar surgical intervals depending on whether dorsal revascularization, volar decompression, or carpal salvage is undertaken:

• Dorsal Surgical Approach: Utilized for 1,2-ICSRA pedicled graft harvest, scaphoid proximal pole exposure, four-corner arthrodesis, and proximal row carpectomy. The deep dissection enters between the third extensor compartment (extensor pollicis longus [EPL]) and the fourth extensor compartment (extensor digitorum communis [EDC] and extensor indicis proprius [EIP]). The EPL tendon is mobilized and transposed radially out of Lister’s tubercle, exposing the dorsal radiocarpal capsule. The posterior interosseous nerve (PIN) terminal sensory branch terminates on the capsule in the floor of the fourth compartment and may be excised for denervation.
• Volar Surgical Approach (Modified Henry / Trans-FCR): Utilized for volar core decompression, volar vascularized bone grafting, or anterior scaphoid osteotomy. The internervous plane lies between the flexor carpi radialis (FCR) tendon (innervated by the median nerve) and the radial artery / brachioradialis (innervated by the radial nerve). Opening the deep FCR sheath allows blunt retraction of the radial artery laterally and the FCR / median nerve bundle medially, directly exposing the radioscaphocapitate ligament and volar scaphoid capsule.

Neurovascular Danger Zones

• Superficial Branch of the Radial Nerve (SBRN): Emerges beneath the brachioradialis tendon approximately 5 cm proximal to the radial styloid and arborizes into multiple sensory branches crossing the anatomical snuffbox. Vigorous skin retraction or unvisualized transverse incisions during dorsal graft harvest risk traction neuropraxia or painful terminal neuroma formation.
• Radial Artery: Courses obliquely through the floor of the anatomical snuffbox over the scaphoid waist. During mobilization of the 1,2-ICSRA pedicle or scaphoid waist exposure, the main radial trunk is vulnerable to accidental laceration, thermal coagulation, or acute kinking.
• Lateral Antebrachial Cutaneous Nerve (LABCN): Terminal arborizations course adjacent to the cephalic vein on the radial styloid margin; surgical dissection must identify and preserve these branches to avoid chronic burning dysesthesias.
• Palmar Cutaneous Branch of the Median Nerve (PCBMN): Courses between the palmaris longus and FCR tendons in the distal forearm; during volar approaches, incisions must stay strictly within the FCR tendon sheath to prevent iatrogenic transection.

Critical Bony Landmarks and Ligamentous Restraints

The scaphoid articulates proximally with the scaphoid fossa of the radius, medially with the lunate (connected by the scapholunate interosseous ligament [SLIL]) and the capitate, and distally with the trapezium and trapezoid. The radioscaphocapitate (RSC) and long radiolunate (LRL) ligaments cross the volar waist, acting as critical dynamic sling stabilizers. Disruption of scaphoid structural integrity leads to progressive dorsal tilting of the lunate, producing dorsal intercalated segment instability (DISI) kinematics.

3. Pathogenesis

Preiser’s disease represents an idiopathic, primary interruption of intraosseous blood flow to the scaphoid bone in the absence of a detectable acute fracture, high-energy injury, or fibrous nonunion.

Microvascular Ischemia and Osteocyte Necrosis

The initiation of avascular necrosis involves localized microvascular thrombosis, impaired intraosseous venous outflow, or sustained intraosseous compartmental hypertension. Histopathological examination demonstrates empty osteocyte lacunae, fat cell necrosis in the marrow space, and complete loss of osteoblastic cellularity. In response to necrosis, a vascular reparative front emerges from adjacent viable cancellous bone; however, hyperemic osteoclastic resorption outpaces fragile creeping substitution (osteoid apposition). This biological imbalance renders the structural trabeculae profoundly porous, weakened, and mechanically incompetent.

Biomechanical Collapse and Secondary Carpal Instability

Repetitive physiologic carpal loading across the weakened, porous bone produces microtrabecular fatigue fractures. Subchondral structural integrity fails, resulting in cortical collapse, fragmentation, and scaphoid foreshortening. As the scaphoid collapses into pathological flexion (“humpback” deformity), the proximal pole fragments fail to support the scaphoid fossa of the radius. The lunate loses its radial columnar support and tilts into extension via intact triquetral attachments, producing a progressive DISI deformity. Subsequent shear stresses across the incongruent radioscaphoid articulation trigger progressive chondromalacia, articular delamination, and secondary osteoarthritis.

4. Natural History

Preiser’s disease is a rare condition, occurring far less frequently than lunate osteonecrosis (Kienböck’s disease), with an estimated relative frequency of less than 1:10.

Epidemiology and Predisposing Risk Factors

The condition most frequently manifests in patients between 20 and 50 years of age, with a mean presentation in the fourth decade. Although true Preiser’s disease is by definition idiopathic, documented systemic risk factors predisposing to carpal microvascular compromise include:

• Prolonged exogenous corticosteroid administration (systemic or intra-articular).
• Autoimmune connective tissue diseases, particularly systemic lupus erythematosus (SLE) and systemic sclerosis.
• Hypercoagulable states, thrombophilia, or anti-phospholipid antibody syndrome.
• Chronic alcohol abuse and cytotoxic chemotherapy exposure.
• Repetitive occupational vibrational trauma or micro-impact loading.

Progression to Secondary Radioscaphoid Arthrosis

Untreated symptomatic Preiser’s disease exhibits an inexorable natural progression. Unlike pediatric osteochondroses, spontaneous revascularization in skeletally mature patients is exceedingly uncommon once trabecular collapse or subchondral fracture develops. The typical progression spans 2 to 7 years, advancing from localized bone marrow edema to structural scaphoid flattening, secondary DISI deformity, radioscaphoid joint space obliteration, and ultimately severe midcarpal arthrosis mimicking a scaphoid nonunion advanced collapse (SNAC) pattern, while characteristically sparing the radiolunate articulation until late stages.

5. Clinical Presentation

A rigorous clinical assessment combines detailed inquiry into underlying systemic microvascular exposures with targeted carpal provocative maneuvers.

History

• Onset and Character of Pain: Patients present with an insidious onset of dull, deep, aching radial-sided wrist pain that intensifies with active wrist extension, axial loading, heavy lifting, or pushing off a chair.
• Absence of Major Trauma: A classic feature is the lack of an identifiable high-energy traumatic event, distinguishing Preiser’s disease from acute scaphoid waist fracture or nonunion. Patients may recall remote, minor sprains or repetitive microtrauma.
• Functional Impairment: Progressive loss of wrist motion (particularly dorsiflexion and radial deviation), morning stiffness, subjective weakness, and difficulty with heavy manual grip tasks.
• Systemic Screening: Clinicians must specifically inquire about prior steroid use, chemotherapy, rheumatologic conditions, and tobacco use.

Physical Exam

• Anatomical Snuffbox Palpation: Direct thumb compression into the anatomical snuffbox over the scaphoid waist and proximal pole -> Focal tenderness and swelling [Sensitivity 90%, Specificity 45%].
• Scaphoid Tubercle Tenderness: Palpation of the volar scaphoid tubercle at the base of the thenar eminence with the wrist passively extended -> Sharp localized pain and synovial thickening [Sensitivity 82%, Specificity 55%].
• Watson Shift Test (Scaphoid Shift Maneuver): The examiner’s thumb applies firm pressure against the volar scaphoid tubercle while moving the wrist from ulnar deviation/extension to radial deviation/flexion. Release of the thumb allows the subluxated scaphoid to snap back into the scaphoid fossa -> Reproduction of dorsal radial wrist pain and a palpable reduction clunk [Sensitivity 69% to 89%, Specificity 64% to 98%].
• Scaphoid Compression / Axial Load Test: Axial compressive load directed through the first metacarpal shaft compressing the trapezium onto the scaphoid -> Focal reproduction of deep radial carpal pain [Sensitivity 74%, Specificity 60%].
• Active Range of Motion: Symmetrical goniometric evaluation demonstrates progressive loss of wrist extension (typically restricted to 30 to 45 degrees) and radial deviation compared to the uninjured contralateral wrist.
• Grip Dynamometry: Jamar dynamometer testing reveals a profound deficit, with baseline grip strength routinely reduced to 40% to 60% of the contralateral extremity.

6. Imaging and Diagnostic Studies

A multi-modality diagnostic imaging strategy is required to stage the osteonecrosis, distinguish localized from diffuse involvement, and evaluate articular cartilage viability.

Plain Radiography and Morphometric Indices

The standard radiographic evaluation consists of four views: posteroanterior (PA), lateral, 45-degree semi-pronated oblique, and an elongated scaphoid view (PA in ulnar deviation with 20 to 30 degrees of cranial tube tilt).

• Radiographic Hallmarks: Early disease demonstrates patchy osteopenia or mild sclerosis. Advanced stages reveal dense sclerosis, subchondral lucencies (crescent sign), cortical fragmentation, scaphoid shortening, and joint space narrowing at the radioscaphoid facet.
• Scapholunate Angle: Measured on the neutral lateral radiograph between the scaphoid longitudinal axis and the lunate mid-axis. A normal angle ranges between 30 and 60 degrees; an angle greater than 60 degrees confirms a DISI alignment pattern secondary to scaphoid collapse.
• Capitolunate Angle: Normal is less than 30 degrees; angles exceeding 30 degrees signify midcarpal instability.
• Carpal Height Ratio (Youm’s Index): Calculated by dividing carpal height (distance between distal radius articular surface and base of the third metacarpal) by the length of the third metacarpal. Normal is 0.54 ± 0.03; a ratio less than 0.51 reflects significant carpal collapse.

Magnetic Resonance Imaging

MRI represents the diagnostic gold standard, particularly in early stages before plain radiographs demonstrate sclerosis or trabecular collapse:

• T1-Weighted Sequences: Reveal homogeneous or patchy low signal intensity within the proximal pole or throughout the scaphoid, representing replacement of normal fatty marrow with necrotic debris and fibrosis.
• T2-Weighted and STIR Sequences: Demonstrate high signal intensity corresponding to active hyperemia, bone marrow edema, and reactive inflammatory exudate. A serpentine low-signal border often demarcates necrotic bone from adjacent reparative zones.
• Dynamic Contrast-Enhanced MRI: Intravenous gadolinium administration assesses residual vascular perfusion. Absence of enhancement within the proximal pole confirms complete avascularity, guiding the choice between revascularization and carpal salvage.

Computed Tomography

Thin-slice (0.5 to 1.0 mm) volumetric CT with multiplanar reconstructions oriented along the long axis of the scaphoid is essential for surgical planning. CT accurately identifies subchondral cortical fracture, intraosseous cyst formation, fragmentation, and trabecular impaction. Most importantly, CT differentiates generalized osteonecrosis (Kalainov Type 1) from isolated proximal pole involvement (Kalainov Type 2) and establishes the presence of subchondral flattening or secondary radioscaphoid arthritic spurs.

7. Classification

Two validated classification systems govern the clinical evaluation and surgical decision-making in Preiser’s disease: the chronologically oriented staging of Herbert and Lanzetta (1993) and the anatomical pattern classification of Kalainov et al. (2003).

8. Treatment

Treatment algorithms for Preiser’s disease are stratified by the stage of structural collapse, the anatomical distribution of necrosis, and the integrity of the radiocarpal articular cartilage.

Medical / Nonoperative Management

Nonoperative therapy is reserved strictly for early, minimally symptomatic disease (Herbert Stage 1 or early Stage 2), low-demand elderly patients, or individuals with severe medical comorbidities precluding surgery:

• Immobilization Protocol: Rigid thumb spica immobilization (short arm cast or custom thermoplastic orthosis) for a period of 8 to 12 weeks to eliminate shear stresses across the necrotic trabeculae.
• Pharmacologic Adjuncts: Non-steroidal anti-inflammatory drugs (NSAIDs) for symptomatic relief; off-label trials of bisphosphonates (alendronate or zoledronic acid) have been described to inhibit osteoclastic resorption during creeping substitution, though definitive Level I evidence supporting disease reversal is lacking.
• Activity Modification: Strict avoidance of heavy axial impact loading, repetitive wrist flexion-extension, and high-frequency vibratory machinery.
• Objective Failure Criteria: Refractory pain, functional decline, or radiographic emergence of subchondral fracture lines, cortical step-off, or progressive carpal collapse at 3- to 6-month serial imaging dictates immediate transition to surgical intervention.

Operative Management

The primary goals of operative intervention are eradication of necrotic bone, re-establishment of osseous perfusion, restoration of scaphoid anatomy and carpal height, and prevention or salvage of radiocarpal osteoarthritis.

• Core Decompression / Intraosseous Curettage: Indicated in early Stage 1 disease. Direct drilling of the necrotic zone lowers intraosseous venous pressure and stimulates neo-angiogenesis.
• Pedicled Vascularized Bone Grafting (1,2-ICSRA): The gold-standard revascularization technique for Herbert Stage 2 and select Stage 3 disease with localized proximal pole necrosis (Kalainov Type 2). Through a dorsal exposure, the 1,2-ICSRA is harvested with a 2 to 3 mm periosteal sleeve from the dorsoradial radius. The necrotic scaphoid trough is debrided down to punctate bleeding (“paprika sign”), the corticocancellous graft is inset, and rigid stabilization is achieved using Kirschner wires or a headless compression screw.
• Free Vascularized Medial Femoral Condyle (MFC) Flap: Indicated for extensive osteonecrosis (Kalainov Type 1), failed prior local pedicled grafting, or substantial structural cavity defects. The corticocancellous flap is harvested based on the descending genicular or superomedial genicular vessels and transferred to the carpus with microvascular anastomoses to the radial artery and cephalic vein, providing superior osteogenic and angiogenic capacity.
• Proximal Row Carpectomy (PRC): Motion-preserving carpal salvage indicated in Herbert Stage 3 or 4 with collapsed scaphoid and radioscaphoid arthrosis. Excision of the scaphoid, lunate, and triquetrum allows the capitate head to articulate directly within the lunate fossa of the distal radius. PRC requires completely pristine, undamaged articular cartilage on the capitate head and lunate fossa.
• Scaphoid Excision and Four-Corner Arthrodesis (4CA): Indicated in advanced collapse (Herbert Stage 3 or 4) when the proximal capitate articular cartilage exhibits chondromalacia or arthrosis, precluding PRC. The necrotic scaphoid is excised, and intercarpal arthrodesis is performed across the lunate, capitate, hamate, and triquetrum using circular locked fusion plates, headless screws, or crossed K-wires, supplemented with local autograft.
• Total Wrist Arthrodesis: Final salvage procedure reserved for pancarpal arthritis, failed prior motion-preserving salvage, or high-demand heavy laborers requiring an absolute, permanently painless, stable wrist.

Indications & Contraindications

• Absolute Indications for Surgical Intervention: Herbert Stage 2 or greater disease, intractable wrist pain refractory to 12 weeks of nonoperative management, or progressive structural collapse.
• Thresholds for Salvage vs. Revascularization: Presence of subchondral articular step-off exceeding 1 mm, loss of scaphoid height greater than 2 mm, scapholunate angle exceeding 60 degrees, or radioscaphoid joint space narrowing less than 1.5 mm represents an absolute contraindication to isolated revascularization and dictates carpal salvage.
• Contraindications to PRC: Any chondromalacia, eburnation, or degenerative loss of cartilage on the capitate head (Outerbridge Grade 2 or greater) or within the lunate fossa of the radius is an absolute contraindication to PRC, necessitating four-corner arthrodesis.

9. Outcome

Outcomes in Preiser’s disease depend primarily on the anatomical distribution of the necrosis, the structural integrity of the bone at the time of surgery, and the surgical modality selected.

Evidence-Based Revascularization vs. Salvage Results

• Vascularized Bone Grafting: In early-stage disease without structural collapse (Herbert Stages 1 and 2), pedicled revascularization (1,2-ICSRA or volar carpal artery) achieves pain relief and halts necrotic progression in 70% to 80% of patients. In contrast, when vascularized grafting is attempted in Stage 3 disease with established trabecular collapse, re-collapse rates reach 30% to 40%, frequently necessitating secondary salvage.
• Proximal Row Carpectomy Outcomes: PRC provides predictable, durable pain relief. Long-term studies demonstrate preservation of a functional wrist arc of motion averaging 60 to 70 degrees of flexion-extension (approximately 60% of the contralateral uninjured side) and grip strength recovery to 65% to 75% of the contralateral extremity, with implant-free 10-year survivorship exceeding 85%.
• Four-Corner Arthrodesis Outcomes: 4CA consistently relieves pain while preserving approximately 50% to 60% of contralateral flexion-extension motion and restoring 70% to 80% of grip strength. Successful solid union is achieved in 90% to 95% of cases using modern locking plate or headless screw fixation.

Patient-Reported Functional Outcomes and Survivorship

Standardized patient-reported outcome measures (PROMs) reflect substantial clinical improvement across both joint-preserving and salvage cohorts:

• Disabilities of the Arm, Shoulder, and Hand (DASH / QuickDASH): Average preoperative scores ranging from 55 to 65 points improve significantly to postoperative scores of 18 to 26 points at 24-month follow-up.
• Visual Analog Scale (VAS) Pain Scores: Baseline pain levels averaging 7.5/10 decrease to 1.5/10 following solid four-corner arthrodesis or PRC.
• Patient-Rated Wrist Evaluation (PRWE): Mean postoperative PRWE scores consistently demonstrate greater than 60% improvement in functional performance and satisfaction metrics.

10. Complications

Complications associated with the treatment of Preiser’s disease are stratified by chronological occurrence, ranging from acute intraoperative neurovascular injury to late joint arthrosis.

11. Pearls and Pitfalls

Mastery of scaphoid revascularization and carpal salvage requires vigilance regarding diagnostic accuracy, pedicle handling, and objective cartilage evaluation.

Expert Operative Pearls

• The Paprika Sign Mandate: When preparing the scaphoid recipient bed for vascularized grafting, debride all sclerotic, avascular bone using high-speed diamond burrs or sharp curettes until uniform, punctate bleeding (“paprika sign”) is confirmed after tourniquet deflation. Inset of a graft onto non-bleeding, necrotic bone guarantees biological failure.
• Pedicle Soft-Tissue Shielding: When harvesting the 1,2-ICSRA, preserve a 2 to 3 mm cuff of overlying extensor retinaculum and periosteum on either side of the vascular bundle. Avoid skeletonizing the artery, which triggers irreversible vasospasm and pedicle thrombosis.
• Arthroscopic Chondral Pre-Screening: Perform diagnostic radiocarpal arthroscopy prior to bone graft harvest. If the scaphoid proximal articular cartilage is softened, delaminated, or eburnated, abandon joint-preserving revascularization immediately in favor of carpal salvage.
• Distinguish Preiser’s from Occult Fracture Nonunion: Scrutinize sagittal thin-cut CT images for smooth sclerotic fracture margins or cortical interruption typical of remote traumatic nonunion. True Preiser’s disease displays internal trabecular collapse without a clear prior fracture line.

Diagnostic and Technical Pitfalls

• The Revascularization-in-Collapse Trap: Performing a 1,2-ICSRA graft in a scaphoid with advanced structural fragmentation (Herbert Stage 3) is a critical error. The vascularized graft provides biological osteogenesis but insufficient mechanical support to prevent progressive carpal collapse.
• The PRC Capitate Blind Spot: Performing a proximal row carpectomy in the presence of occult capitate head chondrosis guarantees rapid postoperative radiocapitate arthrosis and early revision. If the capitate head is damaged, four-corner arthrodesis is the mandatory alternative.
• Torsional Pedicle Kinking: When transposing the 1,2-ICSRA graft into the dorsal scaphoid trough, ensure the pedicle is routed through a wide subcutaneous tunnel without twisting or acute angulation over the second extensor compartment ridge.

12. Controversy

Several key therapeutic dilemmas remain actively debated in contemporary wrist surgery:

Revascularization vs. Primary Motion-Preserving Salvage in Herbert Stage 3

Significant debate centers on whether joint-preserving vascularized bone grafting is justified once microtrabecular collapse has commenced. Proponents argue that vascularized grafting, especially when combined with rigid internal fixation and osteoinductive autograft, can arrest collapse and preserve native carpal kinematics. Opponents contend that re-collapse rates exceeding 30% expose patients to secondary operations, arguing that primary motion-preserving salvage (PRC or 4CA) offers more predictable, durable pain relief and faster functional recovery.

Proximal Row Carpectomy vs. Four-Corner Arthrodesis in Carpal Salvage

When salvage is indicated, controversy persists regarding the superior procedure. PRC offers technical simplicity, requires no internal fixation hardware, eliminates nonunion risk, and allows earlier rehabilitation. However, PRC depends entirely on the long-term wear resistance of the neo-radiocapitate articulation. Four-corner arthrodesis preserves anatomical carpal height and theoretically provides higher long-term grip strength for younger, manual laborers, but carries a 5% to 10% risk of nonunion, hardware impingement, and a technically more demanding operative execution.

Free Vascularized Medial Femoral Condyle Flap vs. Local Pedicled Graft

The role of microvascular free MFC transfer compared to local pedicled grafting (such as the 1,2-ICSRA) continues to evolve. While the MFC flap delivers robust periosteal and endosteal blood supply with high osteogenic potential suitable for extensive Kalainov Type 1 necrosis, it requires microvascular expertise, extended operative time, and carries donor-site knee morbidity. Local pedicled grafts remain technically straightforward with minimal donor morbidity but may provide inadequate perfusion volume for diffuse scaphoid osteonecrosis.

13. Evidence-Based Synthesis

The contemporary literature governing Preiser’s disease is synthesized in the structured evidence appraisal matrix below:

The contemporary systematic review by Kazemi et al. (2023) established that joint-preserving revascularization with pedicled vascularized bone grafting yields favorable pain relief and functional outcomes in patients presenting prior to structural collapse (Herbert Stages 1 and 2). However, when collapse or cortical fragmentation is established, salvage procedures such as proximal row carpectomy and four-corner arthrodesis offer significantly superior predictability and durability. The landmark investigation by Kalainov et al. (2003) demonstrated that anatomical pattern is an independent determinant of outcome: Type 1 (generalized) osteonecrosis involves the entire scaphoid and carries a high risk of failure if treated with limited local revascularization, whereas Type 2 (localized proximal pole) disease can be successfully treated with targeted dorsal revascularization. Rizzo and Moran (2008) detailed the technical boundaries of 1,2-ICSRA and free medial femoral condyle transfers, reinforcing that vascularized bone grafting cannot reconstitute damaged articular cartilage. Finally, the long-term cohort evaluated by Lenoir et al. (2012) validated that operative staging strictly dictates success, confirming that attempting to revascularize collapsed, fragmented bone leads to unacceptably high rates of secondary osteoarthritis.

14. References

1. Kazemi M, Daliri M, Moradi A. A systematic review on the management of idiopathic avascular necrosis of the scaphoid (Preiser’s disease). Orthop Traumatol Surg Res. 2023;109(2):103480. doi:10.1016/j.otsr.2022.103480 [Level I: Systematic Review / Meta-Analysis]
2. Kalainov DM, Cohen MS, Hendrix RW, et al. Preiser’s disease: identification of two patterns. J Hand Surg Am. 2003;28(5):767-778. doi:10.1016/s0363-5023(03)00260-0 [Level IV: Prognostic Case Series]
3. Rizzo M, Moran SL. Vascularized Bone Grafts and Their Applications in the Treatment of Carpal Pathology. Semin Plast Surg. 2008;22(3):213-221. doi:10.1055/s-2008-1081404 [Level IV: Narrative Review / Observational Study]
4. Lenoir H, Coulet B, Lazerges C, et al. Idiopathic avascular necrosis of the scaphoid: 10 new cases and a review of the literature. Indications for Preiser’s disease. Orthop Traumatol Surg Res. 2012;98(4):390-397. doi:10.1016/j.otsr.2011.11.013 [Level IV: Prognostic Case Series]

Master Class Pro-Tip

When evaluating Preiser’s disease for joint-preserving revascularization, never rely solely on coronal MRI to confirm viability or cartilage integrity. Perform diagnostic radiocarpal arthroscopy or an open dorsal arthrotomy to directly inspect the proximal articular surface under dynamic visualization. The presence of subchondral delamination, softening, or eburnation of the scaphoid fossa dictates an immediate pivot from vascularized grafting (such as 1,2-ICSRA or MFC flap) to motion-preserving salvage: either a proximal row carpectomy (provided the capitate cartilage is pristine) or a four-corner arthrodesis. Revascularizing a structurally compromised, chondromalacic scaphoid inevitably results in secondary radioscaphoid arthrosis and early operative failure.

Master Class Surgical Pearl: Scaphoid Revascularization and Carpal Salvage