monoblast

Thân thiện

A scientist examines a monoblast under a microscope in a laboratory.

Definition

Noun A monoblast is a large, immature cell that is the earliest identifiable precursor in the monocyte cell line. It is normally found in the bone marrow, where it develops into a promonocyte and then a mature monocyte, which enters the bloodstream.

Usage

The term is used almost exclusively in medical and biological contexts, particularly in hematology (the study of blood), histology (the study of tissues), and oncology (the study of cancer), to describe a specific stage of white blood cell development.

Examples

• Under the microscope, the pathologist identified the abnormal cells as monoblasts.
• In acute monoblastic leukemia, there is an uncontrolled proliferation of monoblasts in the bone marrow.
• The normal differentiation sequence is from monoblast to promonocyte to monocyte.

Advanced Usage

• The presence of an excessive number of monoblasts in the peripheral blood (outside the bone marrow) is typically abnormal and suggestive of leukemia.
• In diagnostic reports, the percentage of monoblasts in a bone marrow aspirate is a key criterion for classifying certain types of leukemia.

Variants and Related Words

• Monoblastic (adjective): Pertaining to or characterized by monoblasts.
  • Example: The patient was diagnosed with monoblastic leukemia.
• Promonocyte (noun): The developmental stage immediately following the monoblast.
• Monocyte (noun): The mature, circulating white blood cell that develops from a monoblast.

Synonyms

• Immature monocyte
• Monocyte precursor (This is a descriptive synonym rather than a direct equivalent.)

Notes on Meaning

The word has a single, highly specialized meaning in cell biology and medicine. It does not have general, idiomatic, or phrasal verb uses. Its definition is precise and refers to a specific biological entity.

Học thuật

Noun

1. a large immature monocyte normally found in bone marrow