Seven dogs with hepatic cancer underwent surgical removal of the liver masses. These patients had shown clinical signs such as weight loss, anorexia and diarrhea. The liver masses were adhered to the omentum and intestine, and in some cases, to the pancreas and the caudal peritoneum firmly. In 5 of 7 cases, the affected hepatic lobes with the tumor mass were excised though the surgery was palliative. The case, in which the tumor mass was firmly adhered to the pancreas and the caudal peritoneum, was euthanized during the surgery. In the remaining case, the mass could not be surgically excised and the abdomen was closed after the biopsy of the lesion. Three of 5 cases receiving hepatolobectomy survived more than 19 months, indicating the effectiveness of the palliative surgery in canine hepatic cancers.

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Most cases with osteochondrosis of the joints have been treated conservatively, however, joint incongruity and cartilage lesion may result in arthritis and progression of degenerative joint disease. Three giant breed dogs with marked foreleg lameness were diagnosed as osteochondritis dissecans (OCD) of the elbow and shoulder joints by the clinical signs, radiography and computed tomography. Fragments of OCD lesions in the elbow were removed by arthrotomy without tenotomy and myotomy through the medial approach. Patients recovered the normal walk from the next day of operation. In another case with shoulder OCD, the dorsocaudal humeral head was exposed and the cartilage flap was removed, resueting in the defect with a size of 5mm in diameter. The dog required a month for recovering normal walk. Early identification of OCD and less invasive surgical procedures may lead good recovery of joint function.

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A 4-month-old male mongrel dog was referred with the signs of frequent defecation, tenemus and constipation. The dog had been suspected as rectal prolapse and received purse -string suture of the anus without success. Experimental laparotomy revealed the double lumen of the descending colon with a length of approximately 20 cm. The feces was retained within the blind side of the double lumen, which caused in difficulty in defecation and in partial prolapse of the rectum. Some part of the duplicated colon was excised and at the remaining portion, the septal wall of both lumen of the colon was sharply incised to make a single lumen. Although dyschezia and hematochezia were noted initially after surgery, the patient gradually recovered normal defecation.

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A persistent cutaneous fistula was found in the lower jaw of a 9-year-old castrated West Highland White Terrier. The cause of the fistula was considered to be theabscess of the left lower first or second molar tooth and after extraction of these teeth, the postoperated healing was rapid and there has not been observed any recurrence to date. Persistent and intractable lesions in the lower jaw should be consider dental disorder and external dental fistula. The case of canine external dental fistula in the lower jaw is an extremely rare case.

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