# Systemic Lupus Erythematosus Vasculitis Causing Perforation Peritonitis in Miliary Tuberculosis: A Disease in Disguise

## TL;DR

A patient with tuberculosis was found to have a rare complication of systemic lupus erythematosus vasculitis causing intestinal perforation.

## Contribution

Highlights a rare case where SLE vasculitis mimicked tuberculosis in causing intestinal perforation.

## Key findings

- Histopathology confirmed SLE vasculitis as the cause of perforation, not tuberculosis.
- The patient recovered well post-surgery with normal stomal function during follow-up.

## Abstract

Systemic lupus erythematosus is a complex disease to manage and is complicated further by coexisting comorbidities. We present the case of a 25-year-old female patient who arrived at the emergency department with complaints of abdominal pain for three days, accompanied by a history of fever and non-bilious vomiting for two days. She had no history of trauma or chronic use of painkillers. She was diagnosed with pulmonary and abdominal tuberculosis (TB) four months previously and has been on anti-tubercular therapy since then. Radiological studies showed a collection with echogenic foci in the right iliac fossa with features of abdominal tuberculosis and pneumoperitoneum likely due to perforation. An emergency laparotomy with end ileostomy and distal mucus fistula was performed, followed by limited ileocecal resection, and the specimen was sent for histopathological examination. Surprisingly, the histopathology study revealed SLE vasculitis, contrary to the initial suspicion of ileocecal TB as the cause of perforation peritonitis. The patient was discharged and was followed up within a week with normal stomal function.