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Macrocytosis, mild anemia, and delay in the diagnosis of pernicious anemia
Abstract:
Various factors led to delays of several months to several years in the diagnosis of pernicious anemia in 11 patients, occasionally with serious consequences. These cases illustrate that earlier diagnosis is possible with closer attention to abnormal results of common tests. Macrocytosis, detected by high mean corpuscular volume, often preceded anemia but was not investigated, especially when anemia was only slight. Several cases demonstrated that vitamin B12 deficiency may initially produce only a mild macrocytic anemia, which is maintained for a long period before a rapid worsening supervenes; the reason for the latter acceleration of anemia is unknown. Most serious was the evidence that mild anemias are often ignored. Stricter attention to the established limits of normal hemoglobin values is required. These aspects of physician performance have implication for the recognition of all anemias.
Insights
Delays in diagnosing pernicious anemia are common, often due to overlooking mild symptoms like macrocytosis. Earlier detection requires closer attention to common blood test results to prevent serious health consequences.
Area of Science:
- Hematology
- Internal Medicine
Background:
- Pernicious anemia diagnosis is often delayed, leading to severe health issues.
- Early detection of vitamin B12 deficiency is crucial.
Observation:
- Eleven patients experienced diagnostic delays ranging from months to years.
- Macrocytosis (high mean corpuscular volume) frequently preceded anemia but was often uninvestigated.
- Mild anemias were commonly overlooked, despite abnormal test results.
Findings:
- Vitamin B12 deficiency can present as mild macrocytic anemia for extended periods before rapid deterioration.
- Failure to investigate borderline or mild hematological abnormalities contributes to diagnostic delays.
- Inconsistent adherence to established normal hemoglobin values impacts timely diagnosis.
Implications:
- Improved physician awareness of subtle hematological markers can expedite pernicious anemia diagnosis.
- Systematic review of common blood test results is essential for early detection of anemias.
- Addressing diagnostic delays in pernicious anemia can mitigate severe patient outcomes and improve anemia recognition broadly.