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Biomedical subjects

T Imaeda

Publications and source records attributed to T Imaeda.

151 records · Page 9Linked to original sources
PubMedDate not supplied

Sports-related Kienböck's disease.

Ten patients with Kienböck's disease who were actively engaged in sports activities involving repeated minimal trauma to the wrist are presented. Comparative studies between the 10 patients with sports-related Kienböck's disease and 82 manual laborers with Kienböck's disease showed no difference in clinical presentation or radiographic findings. The history of repeated minimal trauma appeared to be similar in the two groups. Therefore, sports activities in which the wrist suffers repeated impact can lead to the development of Kienböck's disease identical to that occurring in manual laborers, although the sports group was younger and had smaller ulnar variance. Radial osteotomy improved clinical symptoms even in sports-related Kienböck's disease.

Adolescent↗
PubMedDate not supplied

Renal pelvic and ureteral carcinoma with huge hydronephrosis: US, CT, and MR findings.

A 78-year-old man presented huge hydronephrosis with a calculus in the left kidney, and underwent left nephroureterectomy under the diagnosis of renal pelvic and ureteral tumor. Histological examination disclosed renal pelvic and ureteral tumors featuring mixed histologic types of carcinoma. Magnetic resonance (MR) imaging was superior to computed tomography (CT) in its complete, detailed demonstration of the renal pelvic lesions. The imaging characteristics of CT, MR imaging, ultrasonography, and retrograde ureterography were discussed in the report.

Adenocarcinoma↗
PubMedDate not supplied

Overestimation ratio of hepatic lesion size on spiral CT arterial portography: an indicator of malignancy.

PURPOSE: To assess the reliability of the size-overestimation ratio obtained from spiral CT arterial portography (CTAP) and spiral equilibrium-phase CT (EPCT) in distinguishing malignant focal hepatic lesions from benign ones. METHODS: The CTAP images and EPCT images obtained five minutes after CTAP in 39 patients with focal hepatic lesions were retrospectively analyzed. Fifty-eight lesions (hepatocellular carcinoma [HCC], 33; metastasis, 10; liver cyst, 10; cavernous hemangioma, 2; adenomatous hyperplasia [AH], 2; focal nodular hyperplasia [FNH], 1) had their sizes measured on CTAP and EPCT images using the calipers on the CT console. RESULTS: The size-overestimation ratios (CTAP/EPCT) were 1.24+/-0.15 in HCC, 1.28+/-0.26 in metastasis, 1.02+/-0.23 in liver cyst, 0.98+/-0.34 in cavernous hemangioma, 0.94+/-0.39 in AH, and 1.00 in FNH. Mean size-overestimation ratios for benign- and malignant-lesion groups were 1.00+/-0.37 and 1.25+/-0.18, respectively (p < 0.0001). When a cutoff level was set at 1.05, sensitivity and specificity for malignancy were 91% and 93%, respectively. CONCLUSIONS: In comparison with EPCT, CTAP significantly overestimates the size of malignant hepatic tumors. This phenomenon may be an indicator of hepatic malignancy.

Adolescent↗