microcytic anemia
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A doctor examines a blood smear showing microcytic anemia under a microscope.
Definition
Noun: A type of anemia characterized by the presence in the blood of red blood cells (erythrocytes) that are smaller than normal. The term describes a condition, not a single disease, and it is a laboratory finding that indicates an underlying problem with hemoglobin synthesis.
Usage
"Microcytic anemia" is a medical term used to classify and describe a specific blood disorder based on the physical size of red blood cells. It is typically used in clinical, diagnostic, and academic contexts.
Examples
- The patient's blood test revealed a microcytic anemia, prompting further investigation for iron deficiency.
- The most common cause of microcytic anemia worldwide is iron deficiency.
- Not all small red blood cells indicate disease; some populations may have a benign, inherited form of microcytic anemia.
Advanced Usage
- Laboratory Diagnosis: The condition is identified by a low mean corpuscular volume (MCV) on a complete blood count (CBC). A diagnosis of microcytic anemia is a starting point for determining the specific underlying cause.
- Differential Diagnosis: The term is central to the phrase "differential diagnosis of microcytic anemia," which refers to the process of distinguishing between its various causes, such as iron deficiency, thalassemia, or anemia of chronic disease.
Variants and Related Words
- Microcytic (adjective): Describes the red blood cells themselves. (e.g., )
- Microcytosis (noun): The condition of having smaller-than-normal red blood cells; this is the cellular finding that defines microcytic anemia. (e.g., )
- Hypochromic microcytic anemia: A more specific term often used synonymously, indicating the red cells are both small () and pale () due to insufficient hemoglobin.
Synonyms
- Microcytosis with anemia (This is more descriptive than a true synonym.)
- Hypochromic microcytic anemia (A common, more specific synonym.)
Antonyms
- Macrocytic anemia: Anemia characterized by larger-than-normal red blood cells.
- Normocytic anemia: Anemia in which the red blood cells are normal in size.
A doctor examines a blood smear showing microcytic anemia under a microscope.
Noun
- anemia in which the average size of erythrocytes is smaller than normal