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Akimasa Yoshida

Publications and source records attributed to Akimasa Yoshida.

5 recordsLinked to original sources
PubMed2005

Spinal aneurysm arising from the feeding pedicle of a thoracic perimedullary arteriovenous fistula: case report.

BACKGROUND: Aneurysms of the spinal artery are exceedingly rare. We report on the first case of a pathologically proven aneurysm arising from the feeding pedicle of a perimedullary arteriovenous fistula (AVF). CASE DESCRIPTION: A 42-year-old man presented with subarachnoid hemorrhage (SAH) and spinal angiography demonstrated a thoracic perimedullary AVF fed by the left T8 intercostal artery that also harbored a spinal aneurysm. He underwent laminectomy 18 days postonset. The aneurysm was resected and the fistula was interrupted. CONCLUSION: For appropriate treatment planning, it is necessary to rule out the presence of aneurysms on the feeding vessel in patients with spinal perimedullary AVF who present with SAH.

Adult↗
PubMed2003

[Intraductal papillary mucinous tumor: imaging diagnosis].

We describe the specific findings for the diagnosis of cystic pancreatic tumors, serous cystic tumor (SCT), mucinous cystic tumor (MCT), and intraductal papillary-mucinous tumor (IPMT). The typical SCT is easy to diagnose as it is ball shaped and a honeycomb composition is seen on enhanced computed tomography (CT). SCT with large cysts on the periphery, or large cysts which themselves are the major part of the lesion, which we have often seen recently, causes diagnostic problems. The points for diagnosing such a lesion as SCT are 1) ERP does not show communication with the pancreatic duct, and 2) endoscopic ultrasound(EUS) reveals creeping small cysts inside the lesion. While MCT is ball shaped, covered with a relatively thick capsule, and has cysts that are convex into the cavity, IPMT has protruding cavities although it is also ball shaped. Since IPMT basically arises in the large pancreatic ductal system, the diagnosis is easy with by ERP. However, the problem is that histologically IPMT contains invasive cancer and/or hyperplasia, in addition to adenoma and/or adenocarcinoma. For the qualitative diagnosis of IPMT, it is important to measure the height of the tumor protrusions, for which EUS is excellent. Nonetheless, discrimination between adenoma and adenocarcinoma is not easy. Presently, IPMT lesions are differentiated as "adenoma or adenocarcinoma" and "hyperplasia."; Surgery is suggested for the former, and follow-up observation is appropriate for the latter.

Carcinoma, Pancreatic Ductal↗