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  • Title: [Compression pneumatocele of the lacrimal sac].
    Author: Rochels R, Bleier R, Nover A.
    Journal: Klin Monbl Augenheilkd; 1989 Sep; 195(3):174-6. PubMed ID: 2509783.
    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.
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