Abstract Background Swelling of the perineal region in male dogs is most commonly caused by a perineal hernia. Clinical signs associated with perineal hernia are constipation. tenesmus or stranguria. This case report documents a rare cause of perineal swelling created by the growth of a malignant tumour leading to urethral obstruction and subsequent stranguria. https://safeersappliancers.shop/product-category/smeg-dfd13tp3x-full-size-dishwasher-stainless-steel/