ABSTRACT
Two Domestic Korean Shorthair cats presented with dyschezia and vomiting. Computed tomography revealed a colonic mass with calcification and lymph node metastasis in case 1, and a small intestinal mass with disseminated mesenteric metastasis and calcification in case 2. Histopathology revealed intestinal adenocarcinoma with osseous metaplasia. Case 1 died two months after surgery from distant metastasis; and case 2 showed no metastasis for five months but presented with anorexia, euthanized seven months after diagnosis. Metastatic intestinal adenocarcinoma with bone formation should be considered as differential diagnosis for calcification on imaging, and lymph node metastasis at diagnosis may indicate poor prognosis.
ABSTRACT
An 11-year-old obese dog was referred for a liver mass. Cytologic examination revealed vacuolated hepatocytes with mild pleomorphism. A partial liver lobectomy was performed. On histopathologic examination, the mass was diagnosed as hepatocellular carcinoma composed of hepatocytes with clear vacuoles. These findings were consistent with clear cell hepatocellular carcinoma (CCHCC). The CCHCC is a rare subtype of hepatocellular carcinoma in dogs, and clinical features are poorly defined. This is the first report on the cytological, histological and clinical aspects of CCHCC, suggesting that obesity and hyperlipidemia are potential risk factors for CCHCC in dogs.
ABSTRACT
No abstract available.
ABSTRACT
OBJECTIVE: Image-guided surgical system has been widely used in neurosurgical field for minimally invasive surgery. We evaluate the efficacy of a new neuronavigation system developed by ourselves to neurosurgical procedures. METHODS: Application accuracy was estimated for evaluation of interactive localization of intracranial lesions. A phantom was mounted with ten frameless markers which were randomly distributed on its surface. Target points were digitized and the coordinates were recorded and compared with reference points. Root mean square (RMS) errors of the coordinates were calculated. The system was used in six cases with MR imaging. We evaluated for its utility, ease of integration, reliability, and intraoperative accuracy. RESULTS: Application accuracy is a crucial factor for stereotactic surgical localization system. The estimated RMS error was 1.2+/-0.5mm. This degree of accuracy was comparable to that of other reports. Clincally, it was helpful in preoperative planning, deciding the site and location of craniotomy and judging the anatomical position of intracerebral lesion. CONCLUSION: This system provides an accurate and reliable means for localizing lesions within the brain and identifying underlying anatomical structure. We could minimize surgical morbitidy and operation time.