在B型淋巴细胞白血病中的杯状爆发与KMT2A重排:一种罕见的形态表现
Anab Sayyada1, Apeksha Bhat1, Udayakumar Dharmalingam Sundaram1
1Department of Pathology and Laboratory Medicine, Department of Hematology, Medanta-The Medicity, Sector 38, Gurugram, Haryana 122001 India.
概括
通常在急性髓性白血病 (AML) 中见到的杯状核形态,在罕见的B系急性淋巴细胞白血病 (B-ALL) 中被确定. 这一案例凸显了流细胞计和分子研究对于准确的白血病诊断的重要性.
科学领域:
- 血液学 血液学 血液学
- 在瘤学瘤学.
- 细胞遗传学 细胞遗传学
背景情况:
- 爆发的杯状核形态与急性髓性白血病 (AML) 经典相关,特别是与正常型和NPM1/FLT3-ITD突变相关.
- 这种特定的形态很少在B系急性淋巴细胞白血病 (B-ALL) 中观察到.
- 在B-ALL中异常的CD15表达是一种与KMT2A重新排列密切相关的表型.
研究的目的:
- 报告一种罕见的B系急性淋巴细胞白血病 (B-ALL) 病例,呈现出杯状核形态.
- 强调流细胞计免疫型 (FCI) 和分子研究在分化急性白血病的诊断实用性.
- 为在B-ALL.中关于杯状核形态的有限文献做出贡献.
主要方法:
- 周围血液涂抹 (PS) 分析囊细胞形态.
- 流式细胞计免疫表型 (FCI) 用于免疫表型的表征.
- 用于细胞遗传学分析的型和光在位杂交 (FISH),包括KMT2A重组检测.
- 对NPM1和FLT3-ITD突变进行分子测试.
主要成果:
- 一个33岁的女性呈现出爆发,呈现出杯状的核形态,最初暗示AML.
- FCI发现了CALLA阴性B-ALL与异常的CD15表达.
- 型定型和FISH证实了KMT2A重组 (t(4;11) 并排除了IKZF1删除;NPM1和FLT3-ITD突变是负的.
- 骨髓和单细胞血统标记是负的,排除了混合表型白血病.
结论:
- 这一案例表明,杯状的核形态可以发生在B-ALL中,与KMT2A重新排列有关.
- 流细胞计和分子诊断对于区分AML与B-ALL和混合表型急性白血病至关重要,特别是当形态异常时.
- 这些发现扩大了对B-ALL形态变异及其潜在遗传异常的理解.
相关概念视频
Lampbrush Chromosomes
8.6K
In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
LBCs are made up of two pairs of conjugating homologous chromatids. Each chromatid consists of alternatively positioned regions of condensed-inactive chromatin and loosely placed-active side loops, which can be contracted and extended. The loops...
8.6K
Disorders of Leukocytes
1.8K
Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune...
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune...
1.8K


