Abstract
Incrusted cystitis, leukoplakia and malakoplakia, and the rarest and most interesting of these is malakoplakia. All three are typical urinary bladder infestations; and while the latter two may occur in other parts of the urinary tract, as the kidney pelvis, ureters or urethra, the second pathologic condition mentioned, leukoplakia, is not uncommonly seen in the buccal and nasal cavities and also involving the conjunctiva. In Liebenow's1case there was involvement of the diaphragm. Although the resultant pathologic lesions of these bladder conditions do not resemble one another, the inherent basic process underlying the formation of the lesions is strikingly similar in all three types; and for that reason I will briefly compare the three as to pathology, also giving a demonstration of the actual lesions, and finally will present a new, interesting method of treatment. All the lesions are concomitant with chronic inflammatory processes of the urinary bladder of

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