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Morphologic variants of otherwise pancreatobiliary-type distal common bile duct carcinoma. (a) Tubulolobular features, reminiscent of mammary carcinoma. (b) Microglandular features with intraluminal acidophilic secretions (“mesonephric” pattern). (c) Vacuolated features. (d) Clear-cell and foamy gland features. (e) Intestinal-type features. (f) Medullary features.
