CASE REPORT
Idiopathic pure red cell aplasia: first report on CD8 positive lymphocytosis in bone marrow biopsy sections
1 Haematology Department, Belfast City Hospital, Belfast BT9 7AB, Northern Ireland, UK
2 The Queen’s University at Belfast, Belfast BT7 1NN, Northern Ireland, UK
Correspondence to:
Correspondence to:
Dr K M A Ramadan
Haematology Department, C-Floor, Belfast City Hospital Trust, Lisburn Road, Belfast BT9 7AB, Northern Ireland, UK; kramadan4{at}email.com
There is no information in the literature regarding the lymphocyte content or type in bone marrow biopsies from patients with "idiopathic" pure red cell aplasia (PRCA). This report describes the bone marrow biopsy sections of a patient with PRCA. A diffuse CD3 positive (CD8 positive, granzyme B negative) lymphocytosis of approximately 1500/mm3 was revealed by immunohistochemical staining. The extent of the T cell increase was not evident from morphological examination of the bone marrow aspirate or biopsy, from flow cytometric analysis of the aspirate, or from the peripheral blood lymphocyte count. Therefore, immunohistochemical analysis should be performed routinely in this rare disease and the data acquired may help to inform the choice of treatment.
Abbreviations: LGL, T large granular lymphocytic; PRCA, pure red cell aplasia
Keywords: bone marrow biopsy; immunohistochemistry; pure red cell aplasia
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