Fig. 4
From: Comprehensive analysis of knee cysts: diagnosis and treatment

This sagittal view of the proximal tibiofibular joint (PTFJ-arrow) demonstrates a fusiform synovial cyst (blue) with a neck extending in to the PTFJ. T- lateral tibia, F- head of the fibula, P- popliteal muscle and tendon, LGN- lateral gastrocnemius muscle [4]