Retroperitoneal necrotizing fasciitis mimicking perforated appendicitis: A case report.

INTRODUCTION: Necrotizing fasciitis (NF) is a rare and rapidly progressing soft tissue infection. The commonly involved body parts are the extremities and trunk. Necrotizing fasciitis (NF) involving the retroperitoneum is very uncommon but associated with higher morbidity and mortality. There are only a few patients survived according to the report.

PRESENTATION OF CASE: This is a 19-year-old male patient presented with abdominal pain, high-grade fever, vomiting and abdominal distension for 3 days. On physical examination, he was hypotensive, tachycardic and febrile. He had a distended, tender abdomen, and hypoactive bowel sound. There were no significant pertinent findings on the other systems. Laboratory tests showed leukocytosis, thrombocytopenia, and elevated liver enzymes. After optimizing with resuscitation and initiating antibiotics, a laparotomy was performed. The finding was 300 ml of hemorrhagic fluid, ischemic cecum and ascending colon, and retroperitoneal necrosis. Subsequently, multiple debridement and right hemicolectomy with stoma was performed. Despite the close monitoring in the ICU, the patient died of uncontrolled sepsis.

CLINICAL DISCUSSION: Necrotizing fasciitis (NF) is a rapidly progressing infectious condition that requires urgent intervention. While it is rare for the retroperitoneum to be affected by NF, it is associated with a high mortality rate. The symptoms of retroperitoneal NF are not specific, making it difficult to diagnose. Here, we present a case of retroperitoneal NF with signs and symptoms of generalized peritonitis, resembling perforated appendicitis.

CONCLUSION: When patients are presented with a case of generalized peritonitis, it is important to include retroperitoneal NF as a potential differential diagnosis.