title: [Compression pneumatocele of the lacrimal sac].
abstract: Case report on a 39-year-old man who for five years suffered from a recurrent, firm, crepitant swelling in the medial canthal region after coughing and sneezing. The swelling could be eliminated by digital compression. During a severe bout of sneezing a walnut-sized swelling suddenly occurred which could not be eliminated by compression. Echographic and intraoperative findings confirmed the diagnosis of a large, diverticulous pneumatocele that had compressed the lacrimal sac to such an extent that the entrapped air could not escape. Endoscopy of the nose revealed a wide nasolacrimal ostium, without a Hasner's valve. It was thus possible for air to flow back into the lacrimal drainage system from the nasal cavity.
authors.affiliation: Univ.-Augenklinik Mainz.
authors.forename: R
authors.initials: R
authors.lastname: Rochels
authors.forename: R
authors.initials: R
authors.lastname: Bleier
authors.forename: A
authors.initials: A
authors.lastname: Nover
mesh_terms: D000328:Adult; D003560:Cysts / Q000473:pathology*; D004240:Diverticulum / Q000473:pathology*; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000473:pathology*; D008297:Male; D009301:Nasolacrimal Duct / Q000473:pathology; D011312:Pressure; D012912:Sneezing
vernacular_title: Kompressionspneumatocele des Tränensacks.