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Progressive ureteral obstruction subsequent to ureteroscopic stone removal
Uncommon. Seen most frequently in patients undergoing endourological work-up to remove ureteral stones (Dretler and Young 1993). Fragmentation of calculi during the procedure may cause particle of mineral salts phagocytized by foreign body giant cells and macrophages, followed by fibrosis, then resulting in ureter obstruction because of a granuloma embedded in the ureteral wall (Doddamani et al. 2002).
More common in the males
The stricture is irreversible and it requires surgical treatment.
Ureteral thickening causing ureteric stricture (Fam et al. 2015).
Granuloma with foreign body giant cells and macrophages embedded in the ureter wall causing ureter obstruction.
Macrophages stain with CD68.