The same level of radioactivity was localized in several axillary lymph nodes in one patient ... (11 cases), bilateral groins (1 case), popliteal fossa (2 cases) and epitrochlear (0 case).

The popliteal fossa contains several important anatomical structures, including nerves, blood vessels, and lymph nodes. There can be various reasons for pain. It can be dull or shar pain.