An Unusual Presentation of Renal Mass in a Healthy Adult: Acute Lobar Nephronia Case Report and Review of the Literature

Acute lobar nephronia (ALN) is a kidney infection that can be confused with space-occupying solid masses. It is usually seen in children and renal abscess may develop in 25% of the cases. First-line treatment of ALN is medical treatment. Here, a 30-year-old female patient was admitted to the emergency department with nausea, vomiting, flank pain and fever. Computed tomography (CT) showed an appearance of a wedge-shaped mass in the right renal parenchyma. On the 6th day of antibiotherapy, his right side pain was completely recovered and there was no costovertebral angle tenderness on physical examination. The patient was discharged after completing 21 days of treatment without any complications. There was no mass appearance in the CT images taken on the day of discharge. Although ALN is more frequently seen in children and immunosuppressive patients, it can be seen in young adult patients as in this case.