Devil within: an incidental and rare finding of an extragonandal retroperitoneal germ cell teratoma carcinoid tumour

Extragonadal germ cell tumours (GCTs) are uncommon neoplasms comprising approximately 2%–5% of all GCTs. Of these, approximately 30%–40% occurs as primary retroperitoneal GCTs. This case report details the presentation, diagnosis and management of a 53-year-old man presenting with an incidental finding of a primary extragonadal retroperitoneal teratoma with carcinoid transformation.

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