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  • Journal
    Digital Access Liebert v. 13-, 2010-
  • Article
    Lilleyman JS, Britton JA, Sugden PJ, Hoyle BJ.
    Scand J Haematol. 1979 Jul;23(1):30-2.
    Bone marrow smears taken at diagnosis and subsequent haematological relapse from 41 patients with lymphoblastic leukaemia (ALL) were compared to assess the proportion of blast cells showing a positive periodic acid-Schiff (PAS) reaction at different stages of the same disease. 20 patients never displayed more than 10% PAS positive blasts at any stage, and of these 8 never had any PAS positivity at all. 7 patients maintained a proportion of PAS positive cells over 10% of the total but with no loss or gain in the numbers of such cells. 14 patients showed a significant change in the PAS reaction during the course of their disease, 7 showing a marked reduction in PAS positive cells, and 7 showing an equally marked increase. From these results it seems that the PAS reaction does not identify a sub-type of ALL or mark the degree of differentiation of a given case. It could be indicative of a specific stage of the lymphoblast mitotic cycle.
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