RESUMEN
Glucagonomas, neuroendocrine tumors originating from the pancreas marked by excessive glucagon secretion, present a diagnostic challenge due to their rarity and diverse symptomatology. In this report, we present a 47-year-old female with a history of bariatric surgery, diabetes mellitus, and deep vein thrombosis who exhibited weight loss, anemia, migratory necrolytic erythema on the lower limbs and groin, and fecal incontinence. Imaging revealed liver secondary lesions without an identifiable primary tumor. After undergoing surgery, a pathologic examination of the excised tissue confirmed that the lesions were a glucagonoma. This case underscores the imperative of how common side effects of bariatric surgery could mask symptoms, delaying the diagnosis of glucagonomas.