title: [Four cases of malignant lacrimal sac tumor].
authors.affiliation: quqiuyi75@163.com
authors.forename: Qiu-yi
authors.initials: QY
authors.lastname: Qu
authors.forename: Qiu-hang
authors.initials: QH
authors.lastname: Zhang
authors.forename: Jian-feng
authors.initials: JF
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D002280:Basal Cell Carcinoma / Q000473:pathology; D002291:Carcinoma, Papillary / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000473:pathology; D005260:Female; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009301:Nasolacrimal Duct / Q000473:pathology*; D055815:Young Adult