Fig. 3
From: Sentinel node theory helps tracking of primary lesions of cancers of unknown primary
Images of a CUP patient with left iliac vessels and left inguinal lymph node metastasis. The patient had no symptoms such as diarrhea, constipation, or hematochezia. 18F-FDG PET-CT images after left inguinal lymph node surgery showed metastasis in a lymph node lining the iliac vessels identified (black arrow), and he was otherwise normal. Repeat anorectal examination showed a suspicious lesion in the anal canal, which was finally pathologically confirmed by enteroscopy, although the prior enteroscopy showed no abnormal findings