A rare presentation of soft tissue chondroma
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Highlights of the case

-Extraskeletal chondroma is a benign, slow-growing cartilaginous tumor arising from tenosynovial sheaths.

-It may present challenges for the treating physician.

-This article reports and discusses a case of extraskeletal chondroma affecting the upper thigh.

A 41-year-old male presented with a swelling in the medial aspect of the left thigh. On clinical examination, there was a 10x15cm non-tender, hard, ill-defined mass in the medial aspect of the left upper thigh. Ultrasound showed a large well defined thick wall mass, located inside gracillis or adductor muscles. Magnetic resonance imaging showed a large well-defined mass involving the adductor compartment of the upper thigh. The patient underwent wide local excision under spinal anesthesia. The histopathological examination of the specimen revealed binucleated chondrocytes with dots of calcification confirming ESC.

There are many theories trying to explain the origin of ESC, as some authors think that it originates from the pluripotent cells of the tenosynovium, while others state that it may be derived from metaplasia of the tendon sheath. In this case, the lesion was completely surrounded by muscle fibers away from the nearby tendons. Extraskeletal chondroma is a rare benign lesion, although mostly affect the upper extremities, it can be found anywhere in the body, histopathological examination of the specimen is the diagnostic method of choice.

Source: https://www.sciencedirect.com/science/article/pii/S221026122030448Xdgcid=rss_sd_all


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