Primary extra hepatic hydatid cyst of the kidney: A case report

Abstract

Human echinococcosis (hydatid disease) is highly endemic in Morocco and reemerging as a significant public health problem in this country. It is a cyclozoonotic infection introduced by Echinococcus granulosus, that can invade any organ in the human body. The liver is the mostly affected organ, which is the primary site of human infestation, followed by lungs. Renal involvement by hydatid disease is commonly secondary, occurring owing to primary cyst rupture or disseminated disease. Primary renal localization, often presented as solitary cysts with no visceral involvement, is uncommon even in endemic zone. Herein, a rare cause of renal mass due to an isolated hydatid cyst in a 56-year-old woman who presented with ambiguous left flank pain for the last 10 years. Findings imaging did not reveal any other localizations of hydatid disease. For this scolicidal effect and to prevent peritoneal seeding, the patient was placed on albendazole 400 mg. Three weeks later, the surgery was performed successfully with a left total nephrectomy.

Keywords: Renal mass; imaging; primary hydatid cyst.

Figure 1.

Abdominal ultrasound shows a huge multicystic lesion on the upper pole of the left kidney with a honeycomb appearance representing daughter cysts. GharbiIII-CE2.

Figure 2.

(a) Pre-contrast CT abdomen and pelvis showed a large wall well-defined multicystic mass is seen arising from the upper renal pole, showing thick septations. (b) post-contrast scan showed no significant enhancement.

Figure 3.

(a) Pre-contrast CT abdomen and pelvis showed a large wall well-defined multicystic mass with partially calcified margins. (b) post-contrast scan showed exophytic cortical development of the mass.