Why can't this be a popliteal (Baker's) cyst?
1. It has no anatomic relation to the gastrocnemius semimembranosus bursa. 2. It contains blood degradation products of different age arranged in layers, suggestive of a precipitation thrombus. 3. It is continuous with the popliteal vascular bundle.
Which other imaging studies could have led to the right diagnosis?
1. Colour-coded Doppler ultrasound. 2. CT angiography. 3. MR angiography.
Which complications may arise from this condition?
Peripheral arterial embolism. Life-threatening haemorrhage. Pressure-related nerve damage. Venous-thrombosis of the lower leg due to outflow obstruction.
Large oval, sharply delineated, popliteal mass in continuation with the popliteal artery. Hyperintense signal on T1. Hypo-, iso-, and hyperintense signals with concentric layering on T2. Compression of the popliteal vein.
- MRI (T2):