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Primary cutaneous follicle center lymphoma with diffuse CD30 expression: a report of 4 cases of a rare variant.
Journal of the American Academy of Dermatology 2014 September
BACKGROUND: CD30 is expressed in aggressive and Epstein-Barr virus-associated forms of B-cell non-Hodgkin lymphomas, but is rarely expressed by the majority of tumor cells in primary cutaneous B-cell lymphomas (CBCLs). The expression of CD30 in CBCLs may be at risk for misinterpretation as an unequivocal indicator of a highly aggressive form of the disease.
OBJECTIVE: We report 4 cases of low malignant primary cutaneous follicle center lymphoma (PCFCL) with diffuse and strong expression of CD30 by the majority of neoplastic cells.
RESULTS: The patients included 3 men and 1 woman with tumors on the scalp (3 patients) and chest wall (1 patient). The histologic examinations revealed a mixed, diffuse, and follicular growth pattern with CD20(+), bcl-6(+), and bcl-2(-) tumor cells. Seventy percent to 90% of the tumor cells expressed CD30. Clonal rearrangement of immunoglobulin heavy chain genes was found in 1 of 4 cases. None of the 3 cases yielded positivity for Epstein-Barr virus RNA.
LIMITATIONS: The study is limited by the small number of patients.
CONCLUSIONS: This rare variant of CD30(+) PCFCL needs be distinguished from CD30(+) aggressive B-cell lymphomas. CD30 in this variant of CBCLs may serve as a therapeutic target for anti-CD30 antibody-based strategies.
OBJECTIVE: We report 4 cases of low malignant primary cutaneous follicle center lymphoma (PCFCL) with diffuse and strong expression of CD30 by the majority of neoplastic cells.
RESULTS: The patients included 3 men and 1 woman with tumors on the scalp (3 patients) and chest wall (1 patient). The histologic examinations revealed a mixed, diffuse, and follicular growth pattern with CD20(+), bcl-6(+), and bcl-2(-) tumor cells. Seventy percent to 90% of the tumor cells expressed CD30. Clonal rearrangement of immunoglobulin heavy chain genes was found in 1 of 4 cases. None of the 3 cases yielded positivity for Epstein-Barr virus RNA.
LIMITATIONS: The study is limited by the small number of patients.
CONCLUSIONS: This rare variant of CD30(+) PCFCL needs be distinguished from CD30(+) aggressive B-cell lymphomas. CD30 in this variant of CBCLs may serve as a therapeutic target for anti-CD30 antibody-based strategies.
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