PMC4276271_01
Evaluation and resection of IGF-II-secreting retroperitoneal tumor. (A) Coronal computed tomography shows a retroperitoneal tumor involving the right kidney and displacing the inferior vena cava and liver. (B) A very large mass occupied the right hemiabdomen. Inset shows the gross pathology specimen, resected en block. Bar indicates 3 cm.
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C-peptide levels were undetectable (normal: 1.1-4.4 nL/mL). Computer tomography (CT) of abdomen demonstrated a large right retroperitoneal tumor involving the right kidney and displacing the IVC and liver (Fig. 1A). After the celiotomy, a large mass arising from the retroperitoneum was encountered occupying the majority of the right hemi-abdomen (Fig. 1B). The tumor weighed 3.25 kg and measured 19.5 cm x 17.2 cm x 13.5 cm (Fig. 1B, inset).