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The Korean Journal of Pathology 1994;28(2): 135-143.
Immunohistochemical Study for Ki-1 and EMA Antigens in Large Cell Lymphoma including Anaplastic Large Cell Lymphoma.
Soon Ae Oak, Young Hyeh Ko, Jung Dal Lee
1Department of Pathology, College of Medicine, Hanyang University, Seoul, Korea.
2Department of Pathology, College of Medicine, Kosin University, Pusan, Kroea.
To evaluate the frequency of EM A and Ki-I antigen expression in the large cell lymphoma and to define the histologic characteristics of Ki-1 positive anaplastic large cell lymphoma, 40 cases of malignant lymphoma, diffuse large cell type were immunostained by Ki-I and EMA monoclonal antibodies. Eight cases of large cell lymphomas expressed EMA, among which 4 cases were positive for Ki-I antibody as well. The positive rate for EMA was much higher in T cell lymphomas than in B cell lymphomas. Among 4 cases of Ki-I positive lymphomas, 2 cases showing membrane staining of Ki-1 with prototypic histologic feature of anaplastic large cell lymphoma were classified as Ki-1 positive anaplastic large cell lymphoma(ALCL). Ki-I positive ALCL were T-cell in one and non-T, non-B cell type in the other, respectively. The remaining 2 cases of Ki-1 positive lymphomas showing cytoplasmic staining were classified as both B-cell centroblastic/centrocytic lymphoma and T-cell pleomorphic large cell lymphoma.
Key Words: Ki-I anaplastic large cell lymphoma; EM A; Ki-1; Immunophenotype