Signet-ring cell carcinoma of the urinary bladder is a rare tumour, ac
counting for approximately 0.24% of all bladder malignancies, In this
study, the clinicopathological findings in 13 cases are described. Thi
s malignancy is far more common in men than in women (ratio 11:2). The
distribution by age and clinical symptoms can not distinguish it from
transitional cell carcinoma, The tumour behaves like other high grade
malignancies, presenting frequently at an advanced stage, and having
an unfavourable clinical outcome, No special therapy seems superior to
another.