Tumor benigno de la vaina neural en rodilla. Reporte de caso y revisión bibliográfica

Abstract

Schwannoma is the most common benign peripheral nerve tumor, its presence being exceptional in the nerves of the lower limbs, where it represents 1% of all schwannomas. We present the case of a thirty-one-year-old woman who consulted for anterior knee pain, where a soft, painful mass of approximately 1cm and pain on the lateral joint line was assessed. McMurray's sign was positive. MRI showed an ovoid structure with a cystic signal, superficial and proximal to the medial retinaculum, measuring 10 × 8 × 8 mm and a tear in the body and posterior horn of the lateral meniscus. Arthroscopic treatment for the lateral meniscus tear and open surgical marginal excision of the soft tissue tumor were performed, with pathological diagnosis of schwannoma.

Peripheral nerve schwannomas, although a rare entity, should be considered in the differential diagnosis of painful knee masses, their treatment being surgical excision.