CONGENITAL abnormalities and malpositions of the gallbladder are relatively rare, but since they are encountered occasionally in surgery of the biliary tract it is desirable for the surgeon to be familiar with them. Many types of anomalies of the gallbladder have been described. These include congenital reduplication of the gallbladder, bilobed gallbladder, anomalous positions of the gallbladder, "hourglass" deformities and congenital absence of the gallbladder.
The various types of congenital abnormalities of the gallbladder have been reviewed by several authors including Schachner,1 Gross2 and Meade.3 In a review of the literature, Guyton4 found only 40 cases of congenital reduplication of the gallbladder that had been proved at necropsy or at operation. For descriptive purposes, Boyden5 has divided anomalies of this type into two groups: vesica divisa, or cleft gallbladder, which has two cavities emptying into a single cystic duct, and vesica duplex, which consists of
MAYO CW, KENDRICK DB. ANOMALIES OF THE GALLBLADDERReport of a Case of Left-Sided Floating Gallbladder. Arch Surg. 1950;60(4):668-673. doi:10.1001/archsurg.1950.01250010689002