In Situ Follicular Lymphoma Associated With Progressive Transformation of Germinal Centers

The authors report here a case of in situ follicular lymphoma (FL) associated with progressive transformation of the germinal center (PTGC). A 39-year-old Japanese male developed a mass in the right cervical region. Biopsy of the enlarged lymph node led to a diagnosis of PTGC. Then, 5 years later, t...

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Veröffentlicht in:International journal of surgical pathology 2011-08, Vol.19 (4), p.521-523
Hauptverfasser: Handa, Tomoyuki, Maki, Kazuhiro, Segawa, Asuki, Masawa, Nobuhide, Mitani, Kinuko
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container_issue 4
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container_title International journal of surgical pathology
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creator Handa, Tomoyuki
Maki, Kazuhiro
Segawa, Asuki
Masawa, Nobuhide
Mitani, Kinuko
description The authors report here a case of in situ follicular lymphoma (FL) associated with progressive transformation of the germinal center (PTGC). A 39-year-old Japanese male developed a mass in the right cervical region. Biopsy of the enlarged lymph node led to a diagnosis of PTGC. Then, 5 years later, the lymphadenopathy recurred. The second biopsy specimens contained numerous germinal centers, including PTGC. Although most follicles were cytologically reactive, a few GCs appeared to be somewhat monotonous, composed predominantly of centrocytes and lacking mitotic figures and tangible body macrophages. Immunohistochemical studies demonstrated that these atypical GCs were CD10+, CD20+, and bcl-2+, with λ-light-chain restriction. A previous report emphasized the differential diagnostic problem between PTGC and the floral variant of FL. However, the present case indicated that in situ FL should be added to the list of differential diagnoses for PTGC.
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subjects Adult
Antigens, CD - metabolism
Biomarkers, Tumor - metabolism
Cell Transformation, Neoplastic
Germinal Center - metabolism
Germinal Center - pathology
Humans
Immunoglobulin gamma-Chains - genetics
Immunoglobulin gamma-Chains - metabolism
Lymphoma, Follicular - genetics
Lymphoma, Follicular - metabolism
Lymphoma, Follicular - pathology
Male
Neck
Proto-Oncogene Proteins c-bcl-2 - metabolism
title In Situ Follicular Lymphoma Associated With Progressive Transformation of Germinal Centers
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