Primary adrenal mantle cell lymphoma mimicking a non‐functional retroperitoneal paraganglioma.

Key Clinical Message: Patients presenting with abdominal pain and retroperitoneal mass in radiographic images may be in the early stages of primary adrenal mantle cell lymphoma, which requires histological studies for a definite diagnosis. This report presents a 37‐year‐old woman complaining of ambiguous abdominal pain, with imaging findings revealing a retroperitoneal abdominal mass on the left side of the aorta, and a possible diagnosis of non‐functional retroperitoneal paraganglioma. Total laparoscopic excision was performed. Surprisingly, histological examinations revealed features in favor of mantle cell lymphoma. [ABSTRACT FROM AUTHOR]