E5124. Evasive Parasites: Conquering the Extrahepatic Hydatid
  1. Meghana Kancharla; No Affiliation
  2. Shreyas Reddy K; No Affiliation
  3. Soumya Cicilet; No Affiliation
Hydatid disease, a widespread endemic parasitic zoonosis, continues to be conspicuously thriving in many parts of the world. Although the liver, being the first line of defense, is the most common organ to be involved in, hydatid disease can involve almost any anatomic location in the body due to hematogenous spread or local complications, thus contributing to its ubiquity.

Educational Goals / Teaching Points
1. Illustrate the diverse common and unusual locations of occurrence of hydatid cyst 2. Demonstrate the various imaging characteristics exhibited by hydatid cysts in making a diagnosis.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
The manifestations of hydatid disease can exhibit a wide range of variety, depending on the location of involvement, stage of growth, locoregional effects, complications, and blood-borne dissemination to other sites. The characteristic imaging findings of the hydatid disease have significant anecdotal evidence in the literature, however, its atypical imaging appearances in unusual locations have been sparsely documented, owing to their resemblance to commonly occurring sinister entities in those sites such as abscesses, pseudocysts, hematomas, cystadenomas, and metastases, to name a few. The imaging modalities used in its assessment are conventional radiography, ultrasound (USG), CT, and MRI. Thorough knowledge of these atypical manifestations of hydatid cysts can improve the diagnostic confidence of the radiologist and the clinician.

Hydatid disease can virtually involve any organ or anatomic site in the body. Thorough knowledge of the imaging spectrum of hydatidosis of various organs and its atypical manifestations is extremely valuable in the accurate diagnosis of hydatid disease and timely initiation of appropriate therapy.