This case is reported because of its rarity. DeLee1 states that approximately twenty-five cases have been reported, the majority by European obstetricians. All the cases, beginning with that of Sir J. Y. Simpson2 in 1850, occurred in women who had already borne children, multiparas being more prone to irregular action of the uterus than primiparas. This anomaly of attitude involved one arm in all but two cases; in these, both arms were retrodisplaced. Delivery was spontaneous in two of the cases. A few forceps extractions were performed, with or without injury to the fetus. Version proved the method of choice in the majority of the cases. In one case, forcible extraction with Tarnier forceps caused decapitation of the child. In all cases diagnosed before delivery, an attempt at reduction of the position was made, and, in most instances, was successful.
REPORT OF CASE
Mrs. E. H., aged 23,
Thibaut PL. DYSTOCIA FROM RETRODISPLACEMENT OF LEFT FOREARM COMPLICATED BY PRENATAL SUBGLENOID DISLOCATION OF THE LEFT SHOULDER. JAMA. 1933;100(8):572–573. doi:10.1001/jama.1933.27420080005008d
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