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. Abstract 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.