title: Transformation of monocytoid B-cell lymphoma to large cell lymphoma associated with crystal-storing histiocytes.
abstract: We report a case of crystal-storing histiocytosis associated with large cell lymphoma in a patient with a history of monocytoid B-cell lymphoma 10 years previously. The cervical lymph node biopsy showed a diffuse proliferation of large lymphocytes with vesicular nuclear chromatin and distinct nucleoli. These lymphocytes were associated with numerous immunoglobulin lambda light-chain crystal-storing histiocytes, which morphologically resembled rhabdomyoblasts. Occasional lymphoid cells also showed large immunoglobulin crystals. This case establishes the association of crystal-storing histiocytes with lymphomas of mucosa-associated lymphoid tissue and emphasizes the need for immunophenotyping to distinguish these unusual cases from other tumors, particularly adult rhabdomyomas.
authors.affiliation: Department of Pathology and Laboratory Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: P
authors.initials: P
authors.lastname: Thorson
authors.forename: J L
authors.initials: JL
authors.lastname: Hess
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D003460:Crystallization; D005260:Female; D006644:Histiocytes / Q000737:chemistry / Q000473:pathology*; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D007150:Immunohistochemistry; D008198:Lymph Nodes / Q000473:pathology; D016393:Lymphoma, B-Cell / Q000737:chemistry / Q000473:pathology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000737:chemistry / Q000473:pathology*; D009333:Neck; D016609:Neoplasms, Second Primary; D010307:Parotid Neoplasms / Q000473:pathology / Q000601:surgery
chemical_list: D014408:Biomarkers, Tumor; D007136:Immunoglobulins