title: True histiocytic lymphoma of the esophagus in an HIV-positive patient: an ultrastructural study.
abstract: A 56-year-old white woman, seropositive for human immunodeficiency virus for 18 months without signs of acquired immunodeficiency syndrome, presented with retrosternal pain and progressive dysphagia secondary to an exophytic esophageal mass. Biopsies of the tumor showed a malignant neoplasm composed of pleomorphic, noncohesive cells growing in a diffuse, sheet-like fashion. Immunohistochemically, tumor cells were nonreactive with epithelial, lymphoid, neural, and monocyte/macrophage markers. Despite the noncontributory immunohistochemical findings, ultrastructural study of the tumor cells revealed convincing histiocytic features. Individual cells possessed long, slender filopodial projections, prominent Golgi apparatus, residual bodies, rare lysosomes, and prelysosomes. Immunoglobulin heavy chain and T-cell receptor gamma gene rearrangement studies detected no evidence of a clonal gene rearrangement. The patient responded poorly to chemotherapy and died 5 months after her initial symptom of dysphagia.
authors.affiliation: Department of Pathology, Wishard Memorial Hospital-Indiana University Medical Center, Indianapolis 46202, USA.
authors.forename: I S
authors.initials: IS
authors.lastname: Seo
authors.forename: J D
authors.initials: JD
authors.lastname: Henley
authors.forename: K W
authors.initials: KW
authors.lastname: Min
authors.forename: M N
authors.initials: MN
authors.lastname: Yum
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use; D014408:Biomarkers, Tumor / Q000032:analysis; D004938:Esophageal Neoplasms / Q000737:chemistry / Q000188:drug therapy / Q000648:ultrastructure*; D017809:Fatal Outcome; D005260:Female; D015658:HIV Infections / Q000188:drug therapy / Q000473:pathology*; D006679:HIV Seropositivity; D006801:Humans; D016867:Immunocompromised Host; D007124:Immunoenzyme Techniques; D016483:Lymphoma, AIDS-Related / Q000737:chemistry / Q000648:ultrastructure*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000737:chemistry / Q000188:drug therapy / Q000648:ultrastructure*; D008854:Microscopy, Electron; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D015215:Zidovudine / Q000627:therapeutic use
chemical_list: D000970:Antineoplastic Agents; D014408:Biomarkers, Tumor; D015215:Zidovudine