[ common peroneal nerve compression by a synovial cyst]

The synovial cyst compressing the fibular common nerve is a little known entity at the origin of diagnosis mistakes. The authors recall about a new case the clinical symptomatology: pain of the knee followed by steppage. The palpation can recover a swelling at the level of the fibular neck. The electromyogram permits to localize the nervous lesion comfortably . Our observation puts in evidence the interest of the magnetic resonance imaging. The surgical intervention must search for a possible communication of the cyst with the proximal tibio-fibular joint. The neurological prognosis is generally good in case of recent deficit

[Desmoid tumors of the limbs in the child. About 6 cases]

[Invasive fibroma of the limbs in childhood] Six cases of invasive fibromata have been observed in children of various age. The symptoms are described and were found seldom to be typical. Treatment should always be surgical. Recurrence is frequent despite extensive resection

[Giant cell tumor of the pelvis about a case]

Giant cell tumours are osteolytical lesions usually located on the epiphysis most frequently near the knee and far from the elbow. Their localisation on the ankle is rare: 5 a 7%. Authors report the case of a 32 year old man with a anklean localisation treated with a curettage and acrylic cementation was good evolution