Paratesticular metastasis from primary midgut neuroendocrine tumor: A rare initial presentation.

Neuroendocrine tumors are malignant neoplasms arising from neuroendocrine cells. These are increasingly recognized with rising incidence and encompass a diverse range of phenotypes. The large majority of these originate in the gastrointestinal tract however primary neuroendocrine tumors have also been reported to arise in a variety of organs such as lung, breast, prostate, and skin. Primary malignant paratesticular masses are often sarcomatous in origin and metastatic spread to the paratesticular region or scrotum is exceedingly rare. We report a fascinating case of a 56-year-old male who had an unusual initial presentation of paratesticular lesions on a background of an undescended testicle and an incidental umbilical nodule. After a combination of radiological and histopathological investigations, he was diagnosed with metastatic midgut neuroendocrine tumor.