Figure 1:Posteromedial aspect of the knee with a swelling ,bilobed shape and with ill defined borders Figure 2:Intraoperative image showing a cystic mass in the popliteal fossa region Figure 3: white-tan, lobulated, haemorrhagic firm mass with thick capsule measuring 6.5*4.3*3.2 cm Figure 4: Figure showing the relations of the tumour after the excision. a)Medial head of Gastrocnemius b)Floor with exposed knee joint posteriorly c)Neurovascular bundle of popliteal fossa retracted medially d)Lateral head of Gastrocnemius.