Popliteal lymph node dissection.

Most sentinel nodes are located in the cervical, axillary, and inguinal nodal basins. Sometimes, however, sentinel nodes exist outside these traditional nodal basins. Popliteal nodal metastasis is relatively uncommon, and popliteal lymph node dissection is infrequently necessary. However, with lymphoscintigraphic identification of popliteal sentinel nodes, surgeons are more frequently called on to address the popliteal nodal basin. Therefore, knowledge of the anatomy and surgical technique for popliteal lymphadenectomy is essential. This case study illustrates the importance of considering the approach to the popliteal lymph node basin for patients with melanoma.