Echinococcal infection of kidney is very rare [1][2][3], more over involvement of the kidney without the involvement of the liver and lungs is even more rare [2]. Liver is the most common site of echinococcal infestation (54% to 77%), because the liver acts as the initial filter for the organisms. Those larvae that escape the liver are next filtered by the lungs (9% to 30%). The spleen, (0.9% to 8%), kidney (2% to 3%), and brain (1%) are other organs involved.Keywords: Hydatid cyst kidney; Echinococcus granulosus; Scolicidal agent; Pericystectomy; Abdomen; Ultra sonography
Case ReportA 15 year girl presented with complains of pain in left lumbar and left iliac fossa for 15 days. Pain was sudden in onset and progressive, colicky in nature no aggravating or relieving factor. Not associated with nausea, vomiting or fever. There were no urinary complains. Ultra sonography (USG) abdomen showed a 9.1 x 7.4 x 7.2 cm well defined cystic lesion is seen in left hypochondrium abutting left kidney, spleen, tail of pancreas and stomach. A tiny medullary projection is seen from kidney into cyst. ? Renal cortical cyst/ mesenteric cyst/ pseudo cyst. USG followed by Computed tomography (CT) of abdomen which revealed large thin walled cystic lesion on left side of midline most likely arising from antero-superior aspect of left kidney. With these findings we made a diagnosis of simple cyst arising from left kidney. So surgery was planned.
Surgical ProcedureUreteric catheter was placed cystoscopically. Kidney was explored using left sub costal flank incision. A cyst was present on upper pole of kidney. The cyst content aspirated and was suggestive of hydatid cyst (CLEAR ASPIRATE). Whole cyst was irrigated with hypertonic saline de-roofing of cyst along with removal of endocyst and daughter cysts was done. After de-roofing of cyst betadine mixed saline was instilled through ureteric catheter and we recognized a rent in pelvicalyceal system which was repaired. Patient recovered completely and histopathology confirmed hydatid cyst. Patient was put on Albendazole 400mg twice daily for 3 cycles of 28days each cycle followed by a gap of 14days.
Differential Diagnosis Left Flank PainRenal stones, parenchymal infection or inflammation, neuropathic pain, pleural pain, slipping rib syndrome, renal abscess, renal infarction.
DiscussionA typical hydatid cyst is composed of 3 layers: a pericyst, an exocyst, and an endocyst (germinal layer) containing daughter cysts scolices and hooklets. Renal hydatid disease is an incidental finding, and patients often present with nonspecific clinical signs or symptoms. Presenting complaints are usually dull flank pain, hematuria, or palpable mass in flank region. Serology and imaging modalities establish the diagnosis in most of the cases [3,5]. Serology consists of immuno-electrophoresis, immuno-hem agglutination test, and complement fixation test. The Casoni test is unreliable and outdated. A combination of investigations yields a diagnosis in only 50% of cases. Hydatid cyst can be evaluated by USG...