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Ito A, Miyaoka M, Tomita S, Ikoma H, Hiraiwa S, Carreras J, Kikuti YY, Kawada H, Nakamura N. The multilobated morphology is still a better prognosis factor of diffuse large B-cell lymphoma in the R-CHOP era. Pathol Int 2022; 72:550-557. [PMID: 36218197 DOI: 10.1111/pin.13280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 09/23/2022] [Indexed: 11/29/2022]
Abstract
Diffuse large B-cell lymphoma (DLBCL) is the most common type of B-cell lymphoma. Although the multilobated subtype of DLBCL has been observed since the 1970s, little is known about the clinical significance of this unique variant in the era of rituximab, cyclophosphamide, hydroxydaunorubicin, oncovin, prednisone/prednisolone (R-CHOP) therapy. In this study, the retrospective clinicopathological analysis of 312 patients diagnosed with DLBCL showed that the multilobated DLBCL group comprised 11% of the cases and was predominantly male (p = 0.027), achieved complete remission in the first therapy (p = 0.023), and exhibited germinal center B-cell phenotypes in the Hans algorithm (p = 0.025). The multilobated DLBCL groups had a better prognosis in overall survival (OS) and progression-free survival (PFS) than the non-multilobated DLBCL group (OS, p = 0.006; PFS, p = 0.010). In the multivariate Cox regression analyses for OS, independent prognosis factors were high soluble IL-2 receptor (p = 0.025), high risk of International Prognostic Index, and multilobated morphology (p = 0.031). The most characteristic copy number gains found in more than 50% of the cases were located at 1q, 3p, 10q, 12q, and 14q. Overall, the multilobated morphology in DLBCL exhibits a good outcome in the R-CHOP era.
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Affiliation(s)
- Atsushi Ito
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Masashi Miyaoka
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Sakura Tomita
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Haruka Ikoma
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Shinichiro Hiraiwa
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Joaquim Carreras
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Yara Yukie Kikuti
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Hiroshi Kawada
- Department of Hematology and Oncology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
| | - Naoya Nakamura
- Department of Pathology, School of Medicine, Tokai University, Isehara, Kanagawa, Japan
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