Hepatic arterial catheterization with use of a supple catheter with a ball tip.

A new catheter was developed for hepatic angiography and embolization: a non-torque control supple catheter with a ball tip combined with a small guide wire. The catheter was used successfully in 47 of 49 patients with hepatocellular carcinoma or hepatic metastases. It seldom causes spasm or intimal damage of distal arterial branches and is useful even when there are extensive curves in the arteries leading to the affected site.

Microcatheter with a ball tip for hepatic embolization and intra-arterial chemotherapy.

A microcatheter used mainly for cranial arterial embolization and chemotherapy was employed for hepatic arterial embolization. The tip of the microcatheter is inflated like a small balloon which then acts as a calibrated-leak balloon. A coaxial system employing a conventional catheter for abdominal angiography combined with a propulsion chamber was used.

[Thin-section computed tomography of intrapulmonary metastases after surgical resection of lung cancer].

To evaluate the morphology of small peripheral intrapulmonary metastases of lung cancers, we studied thin-section computed tomography (CT) images of 12 lesions in 5 cases (1 squamous cell carcinoma, and 4 papillary adenocarcinomas). All lesions were resected, and histopathological diagnosis of them was performed in comparison with primary lesions to differentiate multiple primary lung cancers from intrapulmonary metastases. Thin-section CT images showed mildly lobulated nodules in connection with supplying pulmonary vessels, however, indented pleura and vascular convergence were less frequently seen in intrapulmonary metastases in contrast with primary lung cancers.

[Distinguishing benign from malignant pulmonary nodules by gradient analysis of digitized chest radiographs].

Twenty-four conventional chest radiographs with small solitary pulmonary nodules were digitized to analyze optical density gradient. An index number, that could reflect sharpness and contrast of tumor lung interface, was calculated to differentiate benign from malignant pulmonary nodules. In four of 12 patients with benign non-calcified nodules, the index number allowed correct classification as a benign lesion.

Vesical dome tumors: significance of extravesical extension on CT.

Thirteen cases of vesical dome tumors were diagnosed on the basis of computed tomographic (CT) findings. Six were urachal carcinomas, and seven were of vesical origin. All six urachal carcinomas were characterized by predominantly extravesical growth along the urachus; the seven vesical carcinomas did not demonstrate this finding.

Computed tomographic diagnosis of enterovesical fistulae: barium evacuation method.

We reviewed and compared the computed tomographic (CT) findings for 5 patients suspected of having enterovesical fistulae with convential radiographic studies and the results of cystoscopy. Prior to scanning, patients were rectally administered 200 ml of 0.8% wt/vol barium solution, and then evacuated before they were administered 200 ml of olive oil via the anus and 100 ml of olive oil via the urethra.

Gastric hamartomatous polyp without polyposis coli: radiologic diagnosis.

Gastric hamartomatous polyps were found in 25 patients over a period of 4 1/2 years, for an incidence of 11% in all endoscopically biopsied polyps. The number of polyps was fewer than 5 in most patients. All polyps were sessile, sharply demarcated, hemispheric protrusions, measuring up to 10 mm in diameter but most were less than 5 mm.

CT-pathologic correlation in small peripheral lung cancers.

To evaluate the morphology of small peripheral lung cancers, we studied thin-section CT images of 18 small peripheral lung cancers (14 adenocarcinomas, two squamous-cell carcinomas, one large-cell carcinoma, and one carcinoid) in 17 patients. After surgical resection, specimens were sliced transversely, and the gross morphology and histology were correlated with the appearance of the lesion on preoperative thin-section CT images. CT images showed fine speculations in 78%, a notch in 83%, pleural retraction in 78%, and convergence of peripheral vessels in 83% of the 18 lung cancers.

[Primary carcinoma of the male urethra: a case report].

A case of primary carcinoma of the male urethra is reported. A 72-year-old male who complained of dysuria and a perineal mass, was admitted to our hospital in April, 1982. Irregularity and narrowing of bulbous urethra were detected on the urethrocystogram and the biopsied specimen from the perineal mass showed the histological findings of squamous cell carcinoma.

[Evaluation of renal intra-arterial digital subtraction angiography].

A total of 68 patients with renal abnormalities and potential donors were examined by intra-arterial digital subtraction angiography (IA-DSA). Compared with the conventional angiography, the advantages of IA-DSA are reduction of volume of contrast material and rate of injection. The image quality is superior to intravenous DSA.