Biomedical subjects
Publications and source records attributed to R D Dunbar.
Eight hundred computed tomographic (CT) scans of the chest were reviewed, and 12 cases of episternal ossicles were found. Eight persons had paired ossicles, and four had unilateral ossicles. The overall frequency in the study population was 1.5% (men, 1.4%; women, 1.7%). Episternal ossicles represent a normal variant and should be distinguished from fracture fragments, sequestra, foreign bodies, calcified lymph nodes, or vascular calcifications.
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The improved Giemsa-trypsin banding technique was used to differentiate the 4p- (Wolf) from the 5p- (cri du chat) syndrome. New radiographic findings of polydactyly, cervical ribs, and fusion defects of the elbows, ribs, and spine are presented in a girl with 4p- syndrome with 45 chromosomes and a B4/G22 translocation [45, XX, -4, -22, +t(4p22q)].