MATRIX
Ossification
Myositis ossificans
Soft tissue (extraskeletal) osteosarcoma
Calcification
Liposarcoma
Synovial sarcoma
Soft tissue (extraskeletal) chondrosarcoma
AGE
Infancy
Neonatal rhabdomyosarcoma (0.4-2% of all cases of rhabdomyosarcoma)
Soft tissue mass usually without bony invasion
Congenital (infantile fibrosarcoma)
? violaceous skin discoloration
? superficial ulceration of superficial veins
Infantile hemagiopericytoma
Subcutaneous mass
MPNST
Fibromatosis coli
Infantile fibromatosis
Infantile digital fibroma or fibromatosis
Fibrous hamartoma of infancy
Childhood
Rhabdomyosarcoma
Calcifying (juvenile) aponeurotic fibroma
Juvenile hyalin fibromatosis
Young adult
Synovial sarcoma
PREDISPOSING CONDITIONS
Neurofibromatosis
Polyposis coli
Li-Fraumeni syndrome
Retinoblastoma
Xeroderma pigmentosa
Hx of XRT
Childhood malignancies
Chronic lymphedema
Chronic ulcer
Squamous cell carcinoma (Marjolin’s ulcer)
Mechanical spread of air from an ulcer more proximally in a foot described and may not be gas gangrene or necrotizing fasciitis
PHYSICAL EXAMINATION
Auscultation for bruit in AV malformation, renal carcinoma
