Discussion of Bladder schistosomiasis
- Bladder schistosomiasis is a major health problem in developing parts of the world, especially Africa
- Schistosoma haematobium is the cause.
- The larvae are released from snails into water and penetrate human skin exposed to the infected water.
- Larvae travel to the lungs and liver of the human host, where they reside until they mature.
- After maturation, the adult worm pairs travel to the pelvic veins.
- Eggs are deposited in the bladder wall vessels and incite a granulomatous response that results in polypoid lesions.
- The eggs may go on to incite a chronic inflammatory response and fibrosis, which is an important predisposing factor for squamous cell carcinoma.
 Imaging Findings for Bladder schistosomiasis
- Imaging findings mirror the pathologic course.
- In the acute phase, nodular bladder wall thickening is observed at urography or cross-sectional imaging.
- The chronic phase is characterized by a contracted, fibrotic, thick-walled bladder with calcifications. These calcifications are typically curvilinear and represent the large numbers of calcified eggs within the bladder wall. A mass may be secondary to inflammation or complicating carcinoma, typically squamous cell carcinoma.
 See Also
 External Links
 References for Bladder schistosomiasis
- Jade J. Wong-You–Cheong, Paula J. Woodward, Maria A. Manning, and Charles J. Davis. From the Archives of the AFIP: Inflammatory and Nonneoplastic Bladder Masses: Radiologic-Pathologic Correlation. RadioGraphics 2006 26: 1847-1868.