RESUMO
Despite the high prevalence of tuberculosis (TB) in developing countries, primary pancreatic TB is a rare entity. We present a case of pancreatic TB in an immunocompetent patient who was found to have pancreatic mass resembling malignancy. A 40-year-old Indian male presented to the medical emergency room with complaints of abdominal pain and fever for 2 weeks' duration. He had a history of unintentional weight loss of about 20 pounds in the past 2 months. There was no significant history of exposure to TB patient. Family history was unremarkable for any malignancy. On examination, the significant finding was epigastric tenderness. He was thoroughly investigated, his purified protein derivative and QuantiFERON were negative. Chest X-ray was unremarkable. Computed tomography scan abdomen was performed that revealed large heterogenous necrotic mass in the lesser sac likely arising from pancreatic body with possible infiltration of the stomach, left lobe of the liver and encasing celiac vessels and portal vein with multiple peripancreatic and retroperitoneal necrotic lymph nodes. Endoscopic ultrasound with fine-needle aspiration of pancreatic mass was done, biopsy specimen revealed the presence of inflammation with no evidence of malignancy. TB polymerase chain reaction and culture came positive for Mycobacterium tuberculosis. He was started on antituberculosis treatment with isoniazid, rifampicin, pyrazinamide, and ethambutol with a plan to continue for total 6 months. However, follow-up of the patient could not be done as he traveled back to his home country.