[Intraoperative sectional anatomy of congenital absence of tibia type I A].

Intraoperative, angiographic and preparation findings within lower leg and foot of a child with tibial hemimelia type IA according to Jones are presented. Disarticulation at the knee has been performed bilaterally. Dysplasia of the distal femur, absence of the patellae, extensor apparatuses and cruciates were found. Amputated preparation revealed fibrotic band attached via interosseus membrane to the fibula, presence of unidentified muscle attached to the tip of the lateral malleolus, doubled tibialis anterior muscle on one side and accessory extensor digiti II. Talocalcaneal synostosis was bilateral, abnormal cuboids and accessory bones were found. Popliteal artery division was found at the mid-length of the fibula. Unidentified thick nerve passed the lateral ankle and divided at the sole of the foot.