title: Human Immunodeficiency Virus-associated primary effusion lymphoma: An exceedingly rare entity in cerebrospinal fluid.
abstract: Primary effusion lymphoma (PEL) in patients with Human Immunodeficiency Virus (HIV) infection may involve pleural, pericardial, and peritoneal cavities. PEL involving the cerebrospinal fluid (CSF) is exceedingly rare, and to our knowledge has only been reported in two cases. We report another case of PEL diagnosed in CSF from a 61-year-old male with Acquired Immunodeficiency Syndrome that presented with neurological symptoms. Imaging studies of his brain showed leptomeningeal/periventricular enhancement, but no mass lesion. His CSF demonstrated human herpesvirus-8 positive pleomorphic lymphoplasmacytoid cells of null cell phenotype. This case highlights that albeit rare, PEL should be included in the differential diagnosis when large atypical cells are encountered in CSF of HIV-positive patients, even when such patients have no history of lymphoma. As in this case, ancillary studies are required to make an accurate diagnosis of PEL in CSF cytology.
authors.affiliation: Address: Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Sarika
authors.initials: S
authors.lastname: Jain
authors.affiliation: Address: Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Alka
authors.initials: A
authors.lastname: Palekar
authors.affiliation: Address: Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Sara E
authors.initials: SE
authors.lastname: Monaco
authors.affiliation: Address: Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Fiona E
authors.initials: FE
authors.lastname: Craig
authors.affiliation: Department of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Ghassan
authors.initials: G
authors.lastname: Bejjani
authors.affiliation: Address: Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Liron
authors.initials: L
authors.lastname: Pantanowitz
keywords: Acquired Immunodeficiency Syndrome; Human Immunodeficiency Virus; cerebrospinal fluid; cytopathology; human herpesvirus-8; primary effusion lymphoma