2018
DOI: 10.4081/hr.2018.7823
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Morphologic and immunophenotypic features of a case of acute monoblastic leukemia with unusual positivity for Glycophorin-A

Abstract: Acute monoblastic leukemia (AMoL) is characterized by cells with highly undifferentiated morphology. Cytochemistry with non-specific esterases is negative in up to 20% of cases. Immunophenotyping by flow cytometry has an essential role in diagnosing such a subtype of leukemia and a multiparametric approach with a wide monoclonal antibody panel is necessary. We describe a case of AMoL with morphology resembling either plasma blasts or very immature erythroblasts. Diagnosis was made by alpha-naphtyl-acetate este… Show more

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Cited by 5 publications
(5 citation statements)
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“…The clusterization of the blast‐cell images according to their classification distances, summarized in Figure 4, show that the introduced descriptor‐oriented metric successfully groups blast cell subtypes (M5 and M2‐M6‐M7), without requiring subtype labels. As evidenced in Figure 4, the obtained classification‐distance clustering figure shows that AML blast subtypes are independently grouped as monoblasts (M5) and myeloblast, and most of the images labeled as M5 (23 out of 26) are grouped closer to the decision boundary, that is, highly granulated blast cells, with grayish cytoplasm and delicate chromatin [63]. In contrast, images labeled as M7, characterized by heavier chromatin and high nucleus/cytoplasm rate (no visible cytoplasm) [12, 62], are located in the farthest cluster, and with distances near to the maximum metric value.…”
Section: Discussionmentioning
confidence: 99%
“…The clusterization of the blast‐cell images according to their classification distances, summarized in Figure 4, show that the introduced descriptor‐oriented metric successfully groups blast cell subtypes (M5 and M2‐M6‐M7), without requiring subtype labels. As evidenced in Figure 4, the obtained classification‐distance clustering figure shows that AML blast subtypes are independently grouped as monoblasts (M5) and myeloblast, and most of the images labeled as M5 (23 out of 26) are grouped closer to the decision boundary, that is, highly granulated blast cells, with grayish cytoplasm and delicate chromatin [63]. In contrast, images labeled as M7, characterized by heavier chromatin and high nucleus/cytoplasm rate (no visible cytoplasm) [12, 62], are located in the farthest cluster, and with distances near to the maximum metric value.…”
Section: Discussionmentioning
confidence: 99%
“…По литературным данным морфологическими особенностям патологических форм клеток при ХММЛ при окраске мазков крови по Романовскому-Гимза [12] являются «изрезанные» контуры моноцитов, дисплазия нейтрофилов [1,4,10,13,14,15]. Моноциты также имеют причудливое, бобовидное ядро и азурофильную зернистость в цитоплазме.…”
Section: __________________________________________________________________________________unclassified
“…Промоноциты имеют более извилистое очертание ядра, менее базофильную цитоплазму. При цитохимическом исследовании моноцитобласты являются миелопероксидазо (МПО)-негативными и положительные на неспецифическую эстеразу [13,15,19,20,21,22].…”
Section: __________________________________________________________________________________unclassified
“…Як монобласти, так і промоноцити фарбуються позитивно на неспецифічну естеразу (NSE), яка інгібується фторидом натрію, проте NSE часто може бути негативним. При лейкозі мієломонобластному (М4) лейкозні клітини на МПО, неспецифічну естеразупозитивні [6,12,13,20]. AML-M5 слід враховувати навіть тоді, коли лейкемічні клітини слабко позитивні щодо фарбування α-NB [25].…”
Section: Lpesotskaya23@gmailcomunclassified
“…Описаний випадок AML M5 з більшістю лейкемічних клітин, позитивних щодо глікофорину-А, як специфічного маркеру еритроїдної лінії. Цей своєрідний імунофенотип можна інтерпретувати, як похідний від звичайного мієло-еритроїдного попередника, який зазнав лейкемічної трансформації [13]. AMoL та хронічний мієломоноцитарний лейкоз відрізняються побічно експресованими антигенами та кількістю гранулоцитарних клітин [18].…”
Section: Lpesotskaya23@gmailcomunclassified