Tumours of the urogenital system

image of Tumours of the urogenital system
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The kidneys are relatively common sites for development of metastases, but primary tumours of the kidney are uncommon in both the dog and cat. The chapter looks at tumours of the kidney; tumours of the ureter; tumours of the urinary bladder; tumours of the urethra; tumours of the ovary; tumours of the uterus and cervix; tumours of the vagina and vulva; tumours of the testicle; tumours of the penis; tumours of the prostate gland.

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17.2 Intra-operative view of a nephroblastoma of the right kidney.
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17.4 Intravenous urogram revealing the presence of filling defects in the ureter of a cat (arrowed). Excisional surgery (nephrectomy and ureterectomy) and histopathology confirmed the lesion to be a ureteral carcinoma.
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17.6 Cystotomy for partial excision of a large TCC. The presenting clinical signs were haematuria, dysuria and intermittent stranguria.
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17.7 Ultrasound image of a bladder with a TCC (arrowed) at the level of the trigone.
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17.8 Double contrast cystogram demonstrating a mass (arrowed) associated with the dorsal bladder wall. The urothelium appears smooth, suggesting that the mass might be mesenchymal and not epithelial in origin. These findings may also be suggestive of a benign rather than a malignant tumour.
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17.9 Intra-operative view of a smooth non-infiltrative mesenchymal mass associated with the dorsal bladder wall. The gross findings were considered consistent with a benign tumour. Histopathology confirmed the mass to be a leiomyoma.
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17.11 Retrograde positive contrast vaginourethrogram of a bitch with haematuria and dysuria. There is a filling defect within the distal urethra (arrowed) consistent with a urethral tumour. Exfoliative histopathology confirmed the lesion to be a TCC. The bitch subsequently underwent successful tumour resection and reconstructive vaginourethroplasty.
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17.12 Examination of the urethral tubercle and vestibulovaginal junction with the aid of a rigid endoscope. A soft fleshy mass can be seen protruding from the urethral orifice. Pinch biopsies confirmed the mass to be a urethral TCC.
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17.14 A cystic adenocarcinoma of an ovary following ovariohysterectomy in a bitch.
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17.16 A leiomyoma within the right uterine horn. The tumour was found as an incidental finding in a 10-year-old bitch undergoing ovariohysterectomy.
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17.18 Perineal swelling associated with benign vaginal leiomyoma in a bitch.
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17.20 A Sertoli cell tumour associated with a cryptorchid testicle in a dog.
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17.22 Multiple petechial lesions within the epithelium of the glans penis. Full-thickness biopsy samples confirmed the lesions to be haemangiosarcoma, necessitating total penile amputation.
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17.23 Postoperative photograph of a dog following total penile amputation with castration and the construction of a scrotal urethrostomy.
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17.25 Retrograde positive contrast urethrogram demonstrating an irregular intraprostatic urethral margin and leakage of contrast agent into the prostatic parenchyma (arrowed) in a dog with prostatic adenocarcinoma.
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