giovedì 29 novembre 2007
Ring enhancing lesion in the region of the right lacrimal sac, contiguous with the nasolacrimal duct. Surrounding preseptal edema. Scattered relatively mild ethmoid air cell mucosal thickening and bilateral maxillary sinus mucosal thickening. Bones are unremarkable. A mucous retention cyst is seen in the nasopharynx.
Clinical differential diagnosis:
Stagnation of tears in a pathologically closed lacrimal drainage system can result in dacryocystitis.
Acquired dacryocystitis can be acute or chronic.
There is also a form of congenital dacryocystitis, thought to be related to lacrimal excretory system embryogenesis, specifically incomplete canalization of the nasolacrimal duct.
Acute dacryocystitis is manifested by the sudden onset of pain, erythema, and edema overlying the lacrimal sac region.
Complications include abscess formation and spread of infection into the adjacent orbit.