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Biomedical subjects

S Hirota

Publications and source records attributed to S Hirota.

At least 307 records · Page 17Linked to original sources
PubMedDate not supplied

Adrenal endothelial cyst with massive central calcification.

A 55-year-old woman was treated for a rare case of adrenal endothelial cyst that was detected incidentally during management of abdominal pain. Computed tomography of the tumor displayed massive central calcification and a fluid-fluid level by intracystic hemorrhage. Magnetic resonance imaging showed an intracystic papillary part with calcification. After surgery, the tumor was diagnosed as an angiomatous type of adrenal endothelial cyst.

Adrenal Gland Diseases↗
PubMedDate not supplied

Suprarenal inferior vena cava filter placement prior to transcatheter arterial embolization (TAE) of a renal cell carcinoma with large renal vein tumor thrombus: prevention of pulmonary tumor emboli after TAE.

To prevent embolization of necrotic renal vein tumor after transcatheter embolization of a left renal cell carcinoma, we placed a suprarenal Bird's nest inferior vena cava filter. The patient tolerated the procedure well and had extensive tumor infarction including the tumor thrombus on 6-month follow-up computed tomography.

Aged↗
PubMedDate not supplied

Solitary hepatocellular carcinoma fed by the cystic artery: limitation of transcatheter arterial embolization.

PURPOSE: To clarify the limitations of transcatheter treatment for hepatocellular carcinoma (HCC) with parasitic feeders from the cystic artery. METHODS: Three male patients had a solitary HCC (average diameter 3 cm) fed by the cystic artery among 221 patients with HCC from 1994 to 1997. One tumor was nourished entirely from the cystic artery arising from the medial branch of the left hepatic artery, and two tumors were fed partially by the cystic arteries arising from the anterior inferior branch of the right hepatic artery. We analyzed the indications for transcatheter treatment for these three patients. RESULTS: We chose not to embolize the cystic artery for fear of necrosis of the gallbladder. Although embolization of the anterior branch of the right hepatic artery was performed in one patient with a tumor fed partially by the cystic artery, only half the tumor was embolized. Two patients underwent hepatic resection, and one received percutaneous ethanol injection therapy. At follow-up of 28-40 months (average 33 months) all patients are alive. CONCLUSION: Feeding by the cystic artery represents a limitation of TAE for HCC.

Adult↗
PubMedDate not supplied

Interventional radiologic treatment for idiopathic portal hypertension.

PURPOSE: To evaluate the usefulness of interventional radiological treatment for idiopathic portal hypertension. METHODS: Between 1995 and 1998, we performed an interventional radiological treatment in five patients with idiopathic portal hypertension, four of whom had refused surgery and one of whom had undergone surgery. Three patients with gastroesophageal varices (GEV) were treated by partial splenic embolization (PSE), one patient with esophageal varices (EV) and massive ascites by transjugular intrahepatic portosytemic shunt (TIPS) and PSE, and one patient with GEV by percutaneous transhepatic obliteration (PTO). Midterm results were analyzed in terms of the effect on esophageal and/or gastric varices. RESULTS: In one woman with severe GEV who underwent three sessions of PSE, there was endoscopic confirmation that the GEV had disappeared. In one man his EV shrunk markedly after two sessions of PSE. In two patients slight reduction of the EV was obtained with one application of PSE combined with endoscopic variceal ligation therapy. PTO for GV in one patient resulted in good control of the varices. All patients have survived for 16-42 months since the first interventional treatment, and varices are well controlled. CONCLUSION: Interventional radiological treatment is effective for patients with idiopathic portal hypertension, whether or not they have undergone surgery.

Adult↗
PubMedDate not supplied

Complications following balloon-occluded arterial infusion chemotherapy for pelvic malignancies.

PURPOSE: To evaluate the incidence and causes of complications associated with balloon-occluded arterial infusion chemotherapy (BOAI) for pelvic malignancies. METHODS: In 34 courses of BOAI in 22 patients with pelvic malignancies, we analyzed the incidence of complications as well as the effect of the dose of the anticancer drugs, the infusion site, and the number of BOAI administrations on these complications. Complications were divided into two categories: cystitis-like symptoms and neurological complications such as pain, numbness, and paresthesia of the lower extremities and the hip. RESULTS: Eleven patients (50%) suffered from complications, seven (31.8%) from neurological complications and four (18.2%) from cystitis-like symptoms. The complications appeared in 14 courses (42. 4%) of BOAI, neurological complications in 10 (30.3%) and cystitis-like symptoms in four (12.1%). A high dose of anti-cancer drugs and infusion from the anterior division tended to induce neurological complications more frequently; however, the cystitis-like symptoms were not related to any factors. CONCLUSION: Our results indicate that a smaller dose of anti-cancer drugs should be infused from the bilateral internal iliac arteries for safer pelvic BOAI.

Aged↗