Retroperitoneal lymph node tuberculosis complicated by intestinal obstruction: a case report.

The widespread occurrence and severity of tuberculosis make it a major global health concern. Abdominal issues often affect the intestine, peritoneum, and lymph nodes, with retroperitoneal involvement being rare. We herein present a case involving a 51-year-old man who experienced abdominal pain and fever. He had a history of pulmonary tuberculosis 1 year prior, which had been cured 6 months before presentation to our hospital. Abdominal unenhanced computed tomography revealed incomplete bowel obstruction. Abdominal enhanced computed tomography showed significant enlargement of the retroperitoneal lymph nodes, which were compressing the intestinal lumen. Colonoscopy indicated that the terminal ileum and colon were normal. Ultrasound-guided percutaneous lymph node aspiration was performed, and fluorescence staining was positive. After anti-tuberculosis treatment, the patient's abdominal pain and fever improved. Retroperitoneal lymph node tuberculosis presents atypically, and obtaining histopathology early is therefore crucial for diagnosis and treatment.