Primary high grade malignant lymphoma of bladder

Primary malignant lymphoma of bladder is one of the rarest extranodal site for lymphomas. Less than 100 cases have been reported so far [1]. A history of chronic cystitis has been shown to be a preceding feature in many cases (40%) of primary bladder lymphoma [2]. Most of the cases reported in the literature have a low-grade lymphoma including the subtypes of mucosa-associated lymphoid tissue [3,4]. The diffuse large cell lymphoma is the most frequent type among the subtypes of high-grade bladder lymphomas [5]. In this report, a case with high-grade primary malignant lymphoma of bladder is reported and the clinical, pathological aspects of diseases are reviewed.