Metastatic Malignant Melanoma of the Inguinal Lymph Node with Unknown Primary Lesion

Figure 1

Technique. Axial images were obtained from the lower chest to the pubic symphysis with intravenous and oral contrast. Patient received 125 milliliters of Omnipaque 350 as a contrast agent. Findings. Lymph nodes: a necrotic appearing, enlarged right inguinal lymph node is noted, measuring 5.0 × 7.1 cm (blue arrow). Multiple other right inguinal lymph nodes are noted, borderline in size. An enlarged right external iliac lymph node is seen on measuring 2.0 × 1.5 cm. A mildly enlarged 1.5 × 1.1 cm right external iliac lymph node is seen just posterior to this. Nothing abnormal is detected in abdomen or pelvis worthy to mention.