Diffuse large B‐cell lymphoma (DLBCL) is a heterogeneous group of lymphomas which require multiagent therapy for remission induction and are associated with relapse in more than 40% of patients. Spontaneous remission of diffuse large B‐cell lymphoma (DLBCL) is a rare occurrence.

Introduction: Neuroblastoma of urinary tract is an extremely rare type of tumor and only a few cases have been reported worldwide. Case presentation: We presented an adult case of neuroblastoma involving urinary bladder. Patient was a 24-year-old man with a history of repeated attack of hematuria. Patient underwent cystoscopy and transuretheral resection of bladder tumor. Biopsy result was "Blastema cell (suggestive of neuroblastoma) with immature ganglion cells." Immunohistochemistry workup was continued and neuron-specific enolase and S100 staining were positive. Patient lost to further follow-up visit. Conclusion: Although neuroblastoma of skin and peripheral nerve is not a rare disease entity, involvement of deeper structures (especially urinary bladder) is exceptional.Adult neuroblastoma involving urinary bladder is rarely reported in literature. This patient is also the first reported case of adult neuroblastoma of urinary bladder in Myanmar.

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