Berne Dirim METE, MERVE GÜRSOY BULUT, Donald RESNICK

Diagnosis and differential diagnosis of para-articular chondroma of popliteal fossa: A very rare location

Para-artiküler kondromlar dizin infrapatellar yağ yastığında sıklıkla görülen benign kondroid tümörlerdir. Biz burada, popliteal fossa yerleşimli, nadir görülen bir para-artiküler kondrom olgusunu sunmak istedik. Seksen iki yaşında erkek hasta, sağ dizin popliteal bölgesinde kronik ağrı ve şişlik yakınmalarıyla ortopedi servisine başvurmuştu. Düz röntgenogram ve MRG tetkikleri gerçekleştirildi. Röntgenogramda, popliteal fossada, sferik şekilli kalsifikasyonlar içeren, iyi sınırlı kitle saptandı. MRG'de T1 ağırlıklı TSE sekansta; komşu kaslarla eş sinyalde, T2 ağırlıklı yağ baskılı sekansta; kondroid matriks ve ödemi temsil eden heterojen yüksek sinyalli kitle saptandı. Kontrast sonrası alınan kesitlerde, kondrom için tipik olan kondroid lobüllerde periferal kontrastlanma görüldü. Cerrahi olarak çıkarılan kitlenin histopatolojik tanısı para-artiküler kondrom ile uyumlu idi.

Popliteal fossa yerleşimli para-artiküler kondromun tanı ve ayırıcı tanısı: Çok nadir bir lokalizasyon

Para-articular chondroma is a benign chondroid tumor which is frequently seen in the infrapatellar fat pad of the knee. We report a para-articular chondroma case located in the popliteal fossa which is very uncommon. Eighty-two-year- old male was presented to the department of orthopedics with a history of chronic pain and swelling at the popliteal fossa of his right knee. The patient was investigated using the following techniques; plain radiograph and MRI which gave an impression of a benign para-articular chondroma arising from the popliteal fossa. Radiographically, a well- delinated mass with spherical calcifications in the popliteal fossa was detected on the X-ray of the knee. On MRI, isointense signal intensity with adjacent muscles on T1-weighted TSE sequence and heterogeneous high signal intensities suggestive of chondroid matrix and oedema on fat-supressed T2-weighted sequence were detected. On postcontrast images peripheral enhancement in the chondroid lobules which was typical for chondroma was seen. After surgical resection, histopathological examination revealed para-articular chondroma.

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