Table 1

Clinical and histological features and outcome of primary malignant lymphomas of the bladder

Age/Sex	Clinical history	Histological diagnosis	Immunophenotype	Follow up
F, female; M, male; MALT, mucosa associated lymphoid tissue.
66/F	Large bladder mass that clinically resembled stage T3 transitional cell carcinoma. No lymphadenopathy on physical examination or computed tomography	Low grade MALT-type lymphoma	CD20⁺	Alive after 1 year
79/F	Haematuria. Multiple bladder tumours on cystoscopy. No evidence of tumour elsewhere	Low grade MALT-type lymphoma	CD20⁺	No follow up
59/F	First diagnosed in 1995. Defaulted follow up. Re-presented 1998. Solid necrotic tumour anterior wall of bladder, clinically stage T2–T3	Low grade MALT-type lymphoma	CD20⁺ CD43⁺	Alive with disease after 3 years
84/F	Presented with intermittent haematuria over the previous 2 years. Cystoscopy showed mucosal congestion but no obvious tumour. Repeat cystoscopy 3 weeks later showed tumour obscuring the right ureteric orifice, clinically stage T3. There was no lymphadenopathy and no evidence of tumour elsewhere. Macroscopically thought to be invasive transitional cell carcinoma	Diffuse large B cell lymphoma	CD20⁺	Died of disease after 6 months
67/M	Painless haematuria. Irregular tumour mass in right side of bladder. Treated with radiotherapy and chemotherapy. Now has recurrent solid growth in posterior wall of bladder. No evidence of disease elsewhere	Diffuse large B cell lymphoma	CD20⁺ CD30⁺	Alive with disease after 16 years
80/F	Presented with a 3 month history of intermittent haematuria. Impaired renal function. Cystoscopy showed a ring of tumour obstructing the right urethral meatus. Treated with radiotherapy. Bone marrow uninvolved. No evidence of lymphadenopathy or tumour elsewhere	Diffuse large B cell lymphoma	CD20⁺	Alive and well after 3 years 8 months