Sentinel lymph node biopsy has been established as a feasible and
effective method for defining the inguinal node status in patients with
anal adenocarcinoma exceeding the dentate line. We present the axial
lymphoscintigraphic image that depicts thoroughly the injection site
around the anus, the lymphatic path, and the inguinal sentinel lymph
nodes, bilaterally. The distinct springbok pattern was named after the
unique horn shape of the African gazelle. This image puts on the map the
anoinguinal lymphatic path and highlights the need for complete inguinal
lymph node and related lymphatic path dissection in metastatic anal
cancer
