title: Torsion of the gallbladder in a nine-year-old boy.
mesh_terms: D000367:Age Factors; D001064:Appendicitis / Q000175:diagnosis; D002648:Child; D003937:Diagnosis, Differential; D005705:Gallbladder Diseases / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008297:Male; D012737:Sex Factors; D014102:Torsion Abnormality