title: Hemangiopericytoma of the lacrimal sac.
abstract: Hemangiopericytomas of the orbit are rare tumors with low malignancy potential. To the authors' knowledge, only three previous cases of these tumors occurring in the lacrimal sac have been reported. The authors report a fourth case. Follow-up was obtained on the first reported case, and the patient in that case had a recurrence after 15 years. These tumors should be totally excised and followed for long periods of time.
authors.affiliation: Department of Pathology, Northwestern University Medical School, Chicago IL 60611.
authors.forename: S I
authors.initials: SI
authors.lastname: Roth
authors.forename: C Z
authors.initials: CZ
authors.lastname: August
authors.forename: G S
authors.initials: GS
authors.lastname: Lissner
authors.forename: R B
authors.initials: RB
authors.lastname: O'Grady
mesh_terms: D000328:Adult; D003608:Dacryocystorhinostomy; D005260:Female; D005500:Follow-Up Studies; D006393:Hemangiopericytoma / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000473:pathology* / Q000601:surgery; D009364:Neoplasm Recurrence, Local