Synovial sarcoma of the hindfoot

Case contributed by Dr Roberto Schubert

Presentation

Swelling and moderate pain of the right hindfoot, that had evolved over a period of 4 months.

Patient Data

Age: 50
Gender: Female
Modality: MRI

Large hypervascular masses around the deep flexor tendons at the medial and the peroneal tendons at the lateral aspect of the hindfoot. Large T1-hypointense bone lesion of the calcaneus, also with patchy enhancement. No apparent fluid collections.

Modality: CT

The calcaneus shows destructions of its cortical borders, mainly at the medial aspect. There are more circumscript, ill-defined osteolytic lesions and a more permeative pattern of bone infiltration. Note the tumour calcifications of the medial synovial mass.

Case Discussion

Excisional biopsy was done and revealed a poorly differentiated synovial sarcoma pT2b, G3. Crural amputation was subsequently performed. Osseous invasion by synovial sacomas of this extent is rarely reported.

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Case Information

rID: 20087
Case created: 2nd Nov 2012
Last edited: 10th Oct 2015
Inclusion in quiz mode: Included

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