A proerythroblast (or rubriblast, or pronormoblast) is the earliest of four stages in development of the normoblast. In histology, it is very difficult to distinguish it from the other `-blast` cells (lymphoblast, myeloblast, monoblast, and megakaryoblast). The cytoplasm is blue in an H&E stain, indicating that it is basophilic. Proerythroblasts.....
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http://en.wikipedia.org/wiki/Proerythroblast
Noun: A nucleated precursor to the erythrocyte . See Haematopoiesis for picture. Vitamin B12 is essential for the change from proerythroblast to normoblast and then to erythrocyte. Iron, thyroxin and vitamin C are also necessary for its perfect structure.
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http://www.encyclo.co.uk/local/20555
Synonym for pronormoblast ... The earliest of four stages in development of the normoblast. ... See: erythroblast. ... Synonym: lymphoid haemoblast of Pappenheim, proerythroblast, rubriblast. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
(pro″ә-rith´ro-blast) the earliest erythrocyte precursor in the erythrocytic series, preceding the basophilic erythroblast and having a large nucleus containing several nucleoli, surrounded by a small amount of cytoplasm. The term may encompass both normal and abnormal red cell precursors, in which case the ...
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http://www.encyclo.co.uk/local/21001
Type: Term Pronunciation: prō′ĕ-rith′rō-blast Synonyms: pronormoblast
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http://www.medilexicon.com/medicaldictionary.php?t=72559
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