Successful Medical Management of a Retroperitoneal Abscess: A Difficult Diagnosis in Pyrexia of Unknown Origin

Abstract EN

Retroperitoneal abscesses are uncommon conditions with occult and insidious presentations.

There is often a lack of abdominal signs and ultrasound findings, causing a delay in diagnosis and definitive treatment, leading to poor patient outcomes.

We report a case of right-sided retroperitoneal abscess of a 28-year-old female patient with diabetes mellitus.

Prior to admission, the patient reported a vague 2 weeks history of right-sided back and abdominal pain and dysuria.

She presented to our medical ward with suspected pyelonephritis with right-sided renal abscess.

A retroperitoneal abscess involving the right renal fossa was revealed on an urgent CT scan.

The patient underwent percutaneous ultrasound-guided pigtail catheter drainage.

Patient clinically and biochemically improved with medical management gradually over 2 weeks.

This case report highlights the importance of investigating for recurrent urinary tract infections of diabetics which are often overlooked in general practice.