Imaging Diagnosis of a Lumbar Hernia: A Rare and Challenging Presentation.

Lumbar hernias, a rare form of abdominal wall hernia, typically present with subtle, gradually enlarging masses in the lumbar region, often overlooked due to their rarity. This case report details a 38-year-old male farmer who experienced a 10-month history of a slowly enlarging, non-tender swelling in the left loin area, which became more prominent during the Valsalva maneuver. Despite having no significant medical history or prior trauma, a CT scan revealed a 2 cm defect in the superior lumbar triangle, with herniation of perinephric fat, confirming the diagnosis of a superior lumbar hernia. Surgical intervention was undertaken, where a 3 × 3 cm defect was identified intraoperatively, matching the preoperative imaging findings. The hernia was repaired using a Prolene mesh, which was securely anchored to the surrounding posterior abdominal wall tissues to prevent recurrence. The patient's postoperative recovery was smooth and without complications. This case underscores the necessity of including lumbar hernias in the differential diagnosis of lumbar masses, particularly in patients lacking common risk factors, and highlights the critical role of CT imaging in accurate diagnosis and surgical planning. Given the risks of incarceration or strangulation, early surgical repair with mesh reinforcement is essential for ensuring a successful outcome.