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Follicular hodgkin lymphoma: a histopathologic study
Rina Kansal1, Timothy P Singleton, Charles W Ross
1Department of Pathology, University of Michigan, Ann Arbor 48109-0602, USA.
American Journal of Clinical Pathology
|January 16, 2002
Summary
Follicular Hodgkin lymphoma (FHL) can mimic nodular lymphocyte predominant Hodgkin lymphoma (NLPHL). Immunohistochemistry is crucial for distinguishing FHL from NLPHL, aiding accurate diagnosis and treatment.
Area of Science:
- Hematopathology
- Oncology
- Immunohistochemistry
Background:
- Follicular Hodgkin lymphoma (FHL) presents morphologic similarities to nodular lymphocyte predominant Hodgkin lymphoma (NLPHL).
- Accurate differentiation is critical for appropriate patient management.
Observation:
- This study analyzed 13 cases of FHL, comparing their morphologic and immunohistochemical features with 40 NLPHL cases.
- FHL cases exhibited follicles with small germinal centers (GCs) and mantle zones containing classic Reed-Sternberg (RS) cells.
- Reactive GCs were present in 6 of 13 FHL cases.
Findings:
- RS cells in FHL were consistently CD30+ and fascin+, with variable CD15 expression.
- CD20 expression was noted in a subset of FHL cases, highlighting potential diagnostic challenges.
- Immunohistochemical analysis revealed key differences, including the presence of classic RS cells and a relative absence of histiocytes in FHL.
Implications:
- Morphologic overlap between FHL and NLPHL necessitates immunohistochemical confirmation for definitive diagnosis.
- Understanding these distinctions aids in precise classification and guides therapeutic strategies for Hodgkin lymphoma subtypes.