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Biomedical subjects

Toshihiko Ogino

Publications and source records attributed to Toshihiko Ogino.

27 records · Page 2Linked to original sources
PubMed2002

Magnetic resonance imaging characteristics of bizarre parosteal osteochondromatous proliferation of the hand: a case report.

Bizarre parosteal osteochondromatous proliferation (BPOP) is a reactive lesion of cortical bone. A case of fifth metacarpal BPOP with intramedullary inflammatory extension is shown by magnetic resonance imaging. Histologically the intramedullary extension showed fibrosis with inflammatory cell infiltration. The surrounding adipose tissue showed fibrosis, focal inflammatory cell infiltration, and vascular proliferation. It is important to recognize that BPOP can bear radiologic resemblance to malignant lesions or osteomyelitis when there is an intramedullary inflammatory extension. Preservation of cortical bone under the osteocartilaginous mass on T1-weighted magnetic resonance imaging, and homogenous intramedullary enhancement with gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA), can be helpful for distinguishing BPOP from malignant lesions.

Aged↗
PubMed2002

Ultrasonographic assessment of the ulnar collateral ligament and medial elbow laxity in college baseball players.

BACKGROUND: The prevalence of medial elbow instability is high in athletes who throw, such as baseball players. The aim of this study was to assess the medial aspect of the elbow with ultrasonography to detect changes in baseball players. METHODS: Ultrasonography of the medial aspect of the elbow was performed, while gravity stress was applied with the elbow in 90 degrees of flexion, on thirty college baseball players (twelve pitchers and eighteen fielders) to assess medial joint laxity and deformity of the ulnar collateral ligament. The dominant (throwing) extremity was compared with the contralateral extremity. Clinical data were correlated with ultrasonographic findings. RESULTS: The medial joint space was significantly wider on the throwing side than it was on the contralateral side (2.7 mm and 1.6 mm, respectively; p < 0.01), and the proximal part of the ulna was shifted significantly laterally on the throwing side (p < 0.01). Angular deformity of the ulnar collateral ligament was found in five subjects, and it was significantly associated with lateral shift of the proximal part of the ulna (p < 0.01). Medial elbow pain was associated with widening of the medial joint space (p < 0.05) and with the presence of angulation of the ulnar collateral ligament (p < 0.01). CONCLUSIONS: Medial elbow laxity and elbow valgus on the throwing side of baseball players were increased compared with those in nonplayers. Angular deformity of the ulnar collateral ligament suggests that the ligament bends over the distal-medial edge of the trochlea. Ultrasonography can provide useful information about the condition of the ulnar collateral ligament and about medial elbow laxity in athletes who throw.

Adolescent↗
PubMed2000

Retrodental synovial cyst which disappeared after posterior C1-C2 fusion: A case report.

Synovial cysts of the cervical spine are extremely rare. We describe an 8-year-old boy with atlantoaxial subluxation and hypoplasia of the dens. Magnetic resonance imaging showed a round lesion, posterior to the odontoid process. This mass was characterized by a low signal intensity on T1-weighted images, and high signal intensity on T2-weighted images. The retrodental synovial cyst disappeared after posterior atlantoaxial arthrodesis.

Journal Article↗
PubMedDate not supplied

Fragment fixation with a bone graft and dynamic staples for osteochondritis dissecans of the humeral capitellum.

To attain bony union of the fragment in osteochondritis dissecans of the humeral capitellum, fragment fixation was performed with a bone graft and dynamic staples in 4 patients. The staples were inserted not from the articular surface but from the lateral aspect of the capitellum. All patients achieved bony union without complication, and 3 of them returned to playing competitive baseball. At final follow-up after surgery (mean, 7.5 years [range, 2.1-11 years]), 3 patients were able to throw a ball without pain and the remaining patient felt elbow dullness after he played recreational-level baseball as a pitcher. These results suggest that the procedure of fragment fixation with a bone graft and dynamic staples can provide satisfactory results for osteochondritis dissecans of the humeral capitellum with a large osteochondral fragment.

Adolescent↗
PubMedDate not supplied

Hibernomas show intense accumulation of FDG positron emission tomography.

We present 2 cases of hibernoma. Positron emission tomography using the glucose analog [18F]fluoro-2-deoxy-d-glucose (FDG) of 2 patients with hibernoma showed intense accumulation. Standardized uptake values (SUVs) in these patients were 11.93 and 26.74, values much higher than the SUVs reported in published studies of liposarcomas. Standardized uptake values of FDG positron emission tomography may thus be able to differentiate hibernomas from liposarcomas.

Back↗
PubMedDate not supplied

Granular cell tumor of the spinal nerve root: MR findings.

We report granular cell tumor in the right SI nerve root, a location which has not been reported previously. The tumor showed heterogeneous hypointensity on T2-weighted images and heterogeneous enhancement. MRI also demonstrated the precise relation between the tumor and the nerve root.

Adolescent↗
PubMedDate not supplied

Growth disturbance in aseptic osteonecrosis of the humeral trochlea (Hegemann's Disease): a case report with developmental distal radioulnar joint incongruency.

A rare case of aseptic osteonecrosis of the humeral trochlea is described. The patient presented with a late onset of wrist pain caused by a length discrepancy with the short ulna relative to the radius. Close observation is needed for the regeneration of humeral trochlea, as well as for the significant effects of growth disturbance, which might cause the distal radioulnar joint incongruency.

Bone Development↗