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iron deficiency anemia diagnosis CBC RDW
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Here is a detailed interpretation of Isha Bagade's CBC report:
CBC Analysis - Patient: Isha Bagade | 21 years / Female | 19/06/2026
Abnormal Values at a Glance
| Parameter | Result | Reference Range | Status |
|---|---|---|---|
| Hemoglobin (Hb) | 10.8 g/dL | 12 - 15 | ↓ LOW |
| PCV | 36.7% | 40 - 50 | ↓ LOW |
| MCH | 25.5 pg | 27 - 32 | ↓ LOW |
| MCHC | 29.4 g/dL | 31.5 - 34.5 | ↓ LOW |
| RDW-CV | 15.1% | 11.6 - 14.0 | ↑ HIGH |
| Lymphocytes | 16% | 20 - 40 | ↓ LOW (relative) |
| Parameter | Result | Reference Range | Status |
|---|---|---|---|
| Total RBC Count | 4.23 | 3.8 - 4.8 | Normal |
| MCV | 86.8 fL | 83 - 101 | Normal |
| TLC | 5690 | 4000 - 10000 | Normal |
| Platelet Count | 3.08 | 1.5 - 4.1 | Normal |
Provisional Diagnosis: Iron Deficiency Anemia (IDA)
The pattern of findings strongly points to Iron Deficiency Anemia:
-
Low Hemoglobin (10.8 g/dL) - Mild to moderate anemia in a 21-year-old female. Women are especially prone to IDA due to menstrual blood loss.
-
Low MCH (25.5 pg) - Indicates hypochromia - each red cell is carrying less hemoglobin than normal. This is a hallmark of iron deficiency.
-
Low MCHC (29.4 g/dL) - Confirms hypochromia at the concentration level. IDA classically shows low MCHC.
-
Elevated RDW-CV (15.1%) - Indicates anisocytosis (variation in red cell size), a very characteristic early finding in IDA as the bone marrow struggles to produce normal-sized cells due to iron shortage.
-
Low PCV (36.7%) - Consistent with anemia.
-
MCV is still normal (86.8 fL) - This is an early/developing IDA - the MCV drops later. Initially, RDW rises and MCH/MCHC fall before the MCV becomes microcytic. This is a classic sequence of IDA.
As per Quick Compendium of Clinical Pathology, 5th edition: Iron deficiency anemia manifests with microcytosis (↓MCV), hypochromia (↓MCH), anisocytosis (↑RDW), and poikilocytosis on blood smear.
Why Not Thalassemia Trait?
In thalassemia trait, RDW is typically normal (the cells are small but uniform). Here, the elevated RDW (15.1%) combined with low MCH/MCHC favors IDA over thalassemia trait.
Recommended Next Steps (Confirmatory Tests)
| Test | Expected Finding in IDA |
|---|---|
| Serum Ferritin | ↓ Low (most sensitive early marker) |
| Serum Iron | ↓ Low |
| TIBC (Total Iron Binding Capacity) | ↑ High |
| Transferrin Saturation | < 15% |
| Peripheral Blood Smear | Hypochromic cells, pencil cells (elliptocytes) |
Clinical Note
In a 21-year-old female, the most common cause of IDA is:
- Menstrual blood loss (most likely)
- Dietary iron deficiency
- Poor absorption
Treatment typically involves oral iron supplementation (ferrous sulfate 100-200 mg elemental iron/day) for 3-6 months, along with dietary counseling and addressing the underlying cause.
Disclaimer: This is a CBC-based provisional assessment. A treating physician should correlate with clinical history, symptoms, and confirmatory iron studies before finalizing diagnosis and treatment.
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