title: Pitfalls in tumours of the knee.
abstract: The authors describe two patients with knee symptoms. In both cases the correct diagnosis was established late. One patient had a large cyst of the lateral meniscus, while the other had a synovial sarcoma. Aetiology, symptomatology, methods of investigation, therapy and prognosis are discussed, as well as the differential diagnosis. It is stressed, that a meniscal cyst is not adequately treated until the entire meniscus is removed. The puzzling signs and symptoms of a synovial sarcoma of the knee are mentioned. It is obligatory to perform a biopsy in all patients with an unfamiliar swelling of the knee, in order to rule out a malignancy, especially the treacherous synovial sarcoma.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D007717:Knee / Q000473:pathology*; D008297:Male; D013584:Sarcoma, Synovial / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000473:pathology; D013581:Synovial Cyst / Q000175:diagnosis* / Q000473:pathology