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DIAGNOSTIC DELAYS OF SOFT TISSUE SARCOMAS OF THE FOOT AND ANKLE: NOT ALL LUMPS AND BUMPS.



Abstract

Aims: Soft tissue sarcomas (STS) of the foot and ankle are rare tumours. The aims of this study were to examine the presenting features and highlight those associated with a delay in diagnosis.

Methods: Patients presenting during a 10-year period were identified using a computerised database within the Orthopaedic Oncology Unit at the Royal Orthopaedic Hospital, Birmingham, UK. Additional information was obtained from a systematic case note review.

Results: 1519 patients were treated for STS of which 87 (8.2%) had tumours sited in the foot and ankle. Of these, 75 (86.2%) had presented with a discrete lump (42 (56%) of them having an inadvertent “whoops” excision biopsy), 3 (3.4%) with ulceration and the remaining 9 (10.3%) with symptoms more commonly associated with other benign foot and ankle pathology. Within the group of 9 patients they had previously been treated as plantar fasciitis (3), tarsal tunnel syndrome (2), Morton’s neuroma (1) and none specific hind foot pain (3). Median delay from onset of symptoms to diagnosis as STS was 26 months for this group (mean 50; range 6–180 months) compared to 12 months (mean 32; range 3–240) for the “whoops” biopsy group and 10 months (mean 16; range 2–60 months) for the unbiopsied discrete lump group.

Conclusion: Soft tissue sarcoma in the foot and ankle may present insidiously and with symptoms of other benign pathologies. Failure to respond to initial treatment of suspected common benign pathology should be promptly investigated with further imaging e.g. MRI scan or high resolution ultrasound, or with specialist consultation.

Correspondence should be addressed to BOOS at the Royal College of Surgeons, 35 - 43 Lincoln’s Inn Fields, London WC2A 3PN