Wedberg R, Kaplan C, Leopold G, Porreco R, Resnik R, Benirschke K
Obstet Gynecol. 1979 Sep;54(3):392-6.
Conjoined twins occur with a frequency of 1/50,000--1/100,000 deliveries. The cephalothoracopagus variety is particularly rare. This paper presents a case report of cephalothoracopagus (Janiceps) twinning, with a detailed pathologic analysis, as well as an historical review and discussion of diagnostic modalities.
联体双胎的发生率为每50000 - 100000次分娩中有1例。头胸联胎这种类型尤为罕见。本文报告了1例头胸联胎（双面联胎）病例，并进行了详细的病理分析，同时对诊断方法进行了历史回顾与讨论。
