Clinicopathological, immunological and genetic studies of CD30+ anaplastic large cell lymphoma of B-cell type; association with Epstein-Barr virus in a Japanese population.
The clinicopathological features, the immunophenotype, and the presence of Epstein-Barr virus (EBV)-associated genomes and gene products were examined in 17 cases of CD30+ anaplastic large cell lymphoma (ALCL) of B-cell type. Microscopically, the 17 cases were divided into ten cases of the monomorphic type and seven cases of the pleomorphic type. EBV was detected in 6 of 17 cases (38 per cent) by RNA in situ hybridization (ISH) with EBV-encoded RNA (EBER1). EBER1+ cases consisted of two cases (20 per cent) of the monomorphic type and four cases (57 per cent) of the pleomorphic type. The five EBER1+ cases showed clonality of the EBV genome by Southern blotting, consistent with the presence of EBV in a monoclonal proliferation. The EBV-encoded latent membrane protein 1 (LMP1) was found in all six EBER1+ cases and EBV-encoded nuclear antigen 2 (EBNA2) was present in two cases by immunohistochemistry. No expression of LMP1 or EBNA2 was observed in the EBER1-cases. The EBER1+ cases had a tendency for a more favourable prognosis than the EBER1-cases. It is concluded that EBV has an association with CD30+ ALCL of B-cell type in the Japanese population studied, and especially with the large pleomorphic type. EBV infection may play a pathoaetiological role and may influence clinical behaviour.
Kuze
T
T
First Department of Pathology, Fukushima Medical College, Japan.
Nakamura
N
N
Hashimoto
Y
Y
Abe
M
M
Wakasa
H
H
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015139:Blotting, Southern; D005260:Female; D006566:Herpesviridae Infections / Q000150:complications*; D004854:Herpesvirus 4, Human / Q000302:isolation & purification*; D006801:Humans; D007124:Immunoenzyme Techniques; D016130:Immunophenotyping; D017403:In Situ Hybridization; D017728:Lymphoma, Large-Cell, Anaplastic / Q000276:immunology / Q000473:pathology / Q000821:virology*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011379:Prognosis; D015996:Survival Rate; D014412:Tumor Virus Infections / Q000150:complications*