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The prognostic value of Ki‐67 antigen in non‐Hodgkin lymphoma of waldeyer ring and the nasal cavity
Author(s) -
Yamanaka Noboru,
Harabuchi Yasuaki,
Kataura Akikatsu
Publication year - 1992
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19921101)70:9<2342::aid-cncr2820700922>3.0.co;2-6
Subject(s) - lymphoma , ki 67 , medicine , pathology , non hodgkin's lymphoma , antigen , immunostaining , large cell , t cell lymphoma , nasal cavity , cell , b cell , antibody , immunohistochemistry , cancer , immunology , biology , adenocarcinoma , surgery , genetics
Background . A monoclonal antibody, Ki‐67, recognizes an antigen expressed in all phases of the cell cycle, except G0, and can be used as a simple histologic marker of cell proliferation. To assess the prognostic value of the growth fraction in non‐Hodgkin lymphoma of Waldeyer ring (W‐NHL) and the nasal cavity (N‐NHL), the authors applied Ki‐67 immunostaining combined with image analysis on such lymphomas. Methods . The authors studied 29 patients (18 with W‐NHL and 11 with N‐NHL), applying Ki‐67 to frozen sections. The number of Ki‐67‐positive cells in a unit area (0.044 mm 2 ), as an indicator of proliferative activity, and the mean area per Ki‐67‐positive cell (μm 2 ), as an indicator of DNA content, were measured by the image processing system. Results . High‐grade lymphomas showed a significantly larger number of Ki‐67‐positive cells than intermediate‐ grade lymphomas (102.5 ± 21.6 in high‐grade and 46.8 k 8.92 in intermediate‐grade lymphomas, P = 0.03), even when analyzed separately by immunophenotypes. A large mean area per Ki‐67‐positive cell was associated significantly with a T‐cell phenotype (36.3 ± 7.69 μm 2 in T‐cell lymphomas and 19.4 ± 2.33 μm 2 in B‐cell lymphomas, P = 0.034) and an unfavorable clinical outcome. High proliferative activity, defined as nuclear Ki‐67 expression in 2000 or more B‐cell lymphoma cells and 1000 or more T‐cell lymphoma cells in a 1‐mm 2 area, was found to be a strong predictor of poor survival among these patients ( P = 0.048 and P = 0.009, respectively). Conclusions . Ki‐67 immunostaining, combined with image analysis, is a novel method for determining a tumor proliferative index that provides useful clinical data regarding head and neck lymphomas. Cancer 1992; 702342‐2349.