Course Map: Tumor-like Lesions: Giant Cell Cystitis

Giant Cell Cystitis
Large and multinucleated mesenchymal cells are seen in various inflammatory lesions (Fig. 1). They are most often seen in radiation cystitis and, less often, with chronic indwelling catheters (Fig. 2) and other irritative or hemorrhagic lesions [37,60,105].
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	Figure 1: Giant cell cystitis. Large, multinucleated stromal cells represent a benign, reactive alteration of stroma (arrows).
	Figure 2: Giant cell cystitis. Hemorrhage and giant cells secondary to an indwelling catheter.