title: Uncommon locations and presentations of hydatid cyst.
abstract: BACKGROUND
  Hydatid disease (HD) is an ancient disease and even was known to Hippocrates. This disease involves all human parts and most common affected organs are liver and lungs. Incidence of unusual site is about 8-10%. The clinical picture depends upon the involved organs, its effects on adjacent structures, complications due to secondary infection, rupture, and anaphylaxis caused by hydatid cysts.
  
  
  OBJECTIVE
  The aim of this study was to find out incidence of unusual location of hydatid cyst in the human body.
  
  
  METHODS
  A retrospective study of HD was carried in a medical college between July 2007 and June 2012. A total 79 cases of HD were treated during this period. Information on clinical presentation and management were reviewed, and results presented as summary statistics.
  
  
  RESULTS
  Sixty one cases were of liver HD, and 11 were with hydatid lung disease. Fifty cases were with right lobe involvement, and rest 11 were with both lobe involvement. Out of 11 lung hydatid only one case was with bilateral lung involvement. Only eight cases of HD of uncommon locations and presentations were encountered during this period. First case presented with left hypochondriac mass as splenic HD, second with pelvic HD along with obstructive uropathy, third with non-functioning right kidney with bilateral psoas muscles HD, fourth with HD involving mesentery, fifth with pelvic pain due to right ovary HD, sixth with simultaneous involvement of the liver and right subdiaphragmatic region, seventh with HD of right inguinal region, and eighth with hydatid cyst of the left kidney. Even though, there was no mortality found in these patients, there was high morbidity.
  
  
  CONCLUSIONS
  We conclude that Echinococcus granulosus can affect any organ in the body from head to toe, and a high suspicion of this disease is justified in endemic regions. Moreover, medical treatment should be given in the pre-operative period as well as in the post-operative period for 4-6 weeks.
authors: Department of Radio-Diagnosis and Imaging, Muzaffarnagar Medical College, Begrajpur, Muzaffarnagar, Uttar Pradesh, India.
authors: S
authors: S
authors: Sachar
authors: Department of Surgery, Muzaffarnagar Medical College, Begrajpur, Muzaffarnagar, Uttar Pradesh, India.
authors: S
authors: S
authors: Goyal
authors: Department of Pathology, Dr. Ram Manohar Lohia Postgraduate Institute of Medical Sciences, New Delhi, India.
authors: S
authors: S
authors: Goyal
authors: Department of Surgery, MM Institute of Medical Sciences and Research, Mulana, Haryana, India.
authors: S
authors: S
authors: Sangwan
keywords: Hydatid disease; Ovary; Psoas muscle; Renal; Spleen; Unusual locations