title: Images of the month.
mesh_terms: D000328:Adult; D000368:Aged; D001706:Biopsy; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000000981:diagnostic imaging; D015209:Cholangitis, Sclerosing / Q000473:pathology*; D003937:Diagnosis, Differential; D019160:Endosonography; D005260:Female; D015658:HIV Infections / Q000150:complications*; D019693:Hepatitis, Autoimmune / Q000473:pathology*; D006801:Humans; D008297:Male; D018613:Microscopy, Confocal; D008875:Middle Aged; D010183:Pancreatic Ducts / Q000473:pathology*; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D012812:Sigmoidoscopy