[Imaging features of humerus, radius and ulna rare malformation].
OBJECTIVE
To investigate the imaging features of humerus, radius and ulna rare malformation.


METHODS
A retrospective analysis of the clinical data and image of 40 cases of humerus and the radius and ulna rare developmental deformity andadmitted to hospital affiliated to 1958 - 2014 years in The Affiliated Hospital of Hangzhou Normal University and the Third Hospital of Hebei Medical University. Take the Swanson classification as the basis, the image changes of different types of malformations are classified and summarized.


RESULTS
40 cases of humerus , radius and ulna rare malformation in 19 males and 21 females, age 18 days to 51 years, mean age (11.6 ± 11.5) years; a total of 10 kinds of deformities to Swanson classification, radius and ulna: failure of formation of parts 9 cases, for radial defect; failure of differentiation are congenital radioulnar synostosis 6 cases, Madelung' s deformity 12 cases, congenital radial head dislocation 4 cases; duplication 2 cases, for double ulna syndrome; overgrowth 2 cases, as long ulna short radial deformity; undergrowth 1 case, for the micromelia. Humerus and ulna bony involvement: failure of differentiation 1 case, for brachial radial synostosis; failure of formation of parts 1 case, for amelia. There is still one kind of deformity can not be accurately classified as patella cubiti 2 cases.


CONCLUSIONS
Humerus, radius and ulna although more types of malformations and the incidence rate is not high, only a comprehensive understanding of different deformity classification and characteristics, combined with the typical imaging findings in order to arrive at a correct diagnosis to avoid misdiagnosis.
D000015:Abnormalities, Multiple; D000293:Adolescent; D000328:Adult; D005260:Female; D005532:Foot Deformities, Congenital; D006130:Growth Disorders; D006228:Hand Deformities, Congenital; D006801:Humans; D006811:Humerus; D004204:Joint Dislocations; D008297:Male; D008875:Middle Aged; D010009:Osteochondrodysplasias; D011884:Radius / Q000002:abnormalities; D012189:Retrospective Studies; D013576:Syndactyly; D013580:Synostosis; D014457:Ulna / Q000002:abnormalities; D055815:Young Adult