There is an mcq qb in marrow topic anemia workup, what all q can be asked here for neet pg 2026
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anemia CBC peripheral smear reticulocyte count MCV classification
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Here is a comprehensive breakdown of high-yield MCQ areas from the Anemia Workup topic for NEET PG 2026:
🩸 Anemia Workup — High-Yield MCQ Topics (NEET PG 2026)
1. Classification of Anemia — The First Branch Point
The most fundamental and frequently tested concept:
| RPI | Interpretation |
|---|---|
| > 2.5 | Hemolytic / Blood loss anemia (hyperproliferative) |
| < 2 | Hypoproliferative OR Maturation disorder |
Q types:
- What does a Reticulocyte Production Index (RPI) > 2.5 suggest?
- How to differentiate hypoproliferative vs. maturation disorder using MCV and PBS?
- In which anemia is erythroid hyperplasia seen with M/E ratio < 1:1?
(Harrison's 21st Ed., p. 1775)
2. Reticulocyte Count & RPI
- Formula: RPI = (Reticulocyte % × Patient Hct / Normal Hct) ÷ Maturation factor
- Maturation factors: 1 (Hct 45%), 1.5 (Hct 35%), 2 (Hct 25%), 2.5 (Hct 15%)
Q types:
- Calculate RPI given reticulocyte % and hematocrit
- What is the maturation factor at Hct of 25%?
- What does "shift reticulocyte" on PBS indicate?
3. MCV-Based Classification
| MCV | Category | Causes |
|---|---|---|
| < 80 fL | Microcytic | IDA, Thalassemia, Sideroblastic, ACD |
| 80–100 fL | Normocytic | ACD, Aplastic anemia, Hemolysis, Blood loss |
| > 100 fL | Macrocytic | B12/Folate deficiency, Liver disease, Hypothyroidism, Drugs |
Q types:
- Cause of microcytic hypochromic anemia with high serum ferritin?
- Anemia with normal MCV but elevated LDH and indirect bilirubin?
- Which drug causes macrocytic anemia without megaloblastic changes?
4. Iron Studies — Classic Differentials
| Parameter | IDA | ACD | Thalassemia trait | Sideroblastic |
|---|---|---|---|---|
| Serum Iron | ↓ | ↓ | Normal | ↑ |
| TIBC | ↑ | ↓ | Normal | Normal/↓ |
| Ferritin | ↓ | ↑ | Normal | ↑ |
| Transferrin Sat | ↓ | ↓ | Normal | ↑ |
| Serum Hepcidin | ↓ | ↑ | Normal | ↑ |
Q types:
- Best single test to differentiate IDA from ACD?
- In which condition is serum ferritin raised but serum iron low?
- What is the role of hepcidin in ACD?
5. Peripheral Blood Smear Findings
| Smear Finding | Diagnosis |
|---|---|
| Hypersegmented neutrophils | Megaloblastic anemia |
| Target cells | Thalassemia, HbC, Liver disease, IDA |
| Schistocytes | MAHA (TTP, HUS, DIC) |
| Spherocytes | Hereditary spherocytosis, AIHA |
| Teardrop cells (dacrocytes) | Myelofibrosis |
| Sickle cells | Sickle cell disease |
| Dimorphic picture | Sideroblastic anemia, post-transfusion, mixed IDA + B12 |
| Howell-Jolly bodies | Post-splenectomy, functional asplenia |
| Basophilic stippling | Lead poisoning, Thalassemia |
| Ring sideroblasts on BM | Sideroblastic anemia |
Q types:
- What PBS finding is pathognomonic of TTP?
- Hypersegmented neutrophil — cutoff for abnormality?
- Most common smear finding in megaloblastic anemia?
6. Bone Marrow Examination
- Erythroid hyperplasia + low RPI → Ineffective erythropoiesis (megaloblastic, thalassemia)
- Hypoplastic marrow → Aplastic anemia
- Ring sideroblasts > 15% → Sideroblastic anemia (MDS criteria)
- M/E ratio — Normal: 3:1; Reversed (< 1:1) in hemolytic/megaloblastic
Q types:
- In which anemia is BM hypercellular with low reticulocyte count?
- What % of ring sideroblasts is diagnostic of MDS-RS?
- What is normal M/E ratio in bone marrow?
7. Specific Diagnostic Tests
| Test | Used For |
|---|---|
| Coombs (DAT) | AIHA |
| Osmotic fragility | Hereditary spherocytosis |
| HbEP (Electrophoresis) | Thalassemia, Sickle cell |
| Ham's test / Flow cytometry (CD55, CD59) | PNH |
| Sucrose lysis test | PNH (screening) |
| Serum B12 + Homocysteine + MMA | B12 deficiency |
| Schilling test | Pernicious anemia |
| G6PD assay | G6PD deficiency |
| Hemoglobin H inclusion bodies | Alpha thalassemia |
| Kleihauer-Betke test | Fetomaternal hemorrhage |
Q types:
- Gold standard for diagnosis of PNH?
- Schilling test — what does each part indicate?
- Which test becomes positive EARLIEST in B12 deficiency?
8. Serum Markers
| Marker | Elevated in |
|---|---|
| LDH | Hemolysis, megaloblastic |
| Indirect bilirubin | Hemolysis |
| Haptoglobin | Decreased in hemolysis |
| Plasma Hb | Intravascular hemolysis |
| Urine hemosiderin | Chronic intravascular hemolysis (PNH) |
| EPO | Decreased in CKD; elevated in polycythemia vera (absent) |
| Homocysteine | B12 / Folate deficiency |
| MMA (methylmalonic acid) | B12 deficiency only (NOT folate) |
Q types:
- Marker that distinguishes B12 deficiency from folate deficiency?
- What happens to haptoglobin in intravascular hemolysis?
- EPO level in anemia of CKD vs. aplastic anemia?
9. RDW (Red Cell Distribution Width)
| RDW | MCV | Diagnosis |
|---|---|---|
| High | Low | IDA (early), Sideroblastic |
| Normal | Low | Thalassemia trait, ACD |
| High | Normal | Mixed deficiency, early IDA, Hemolysis |
| High | High | B12/Folate deficiency |
| Normal | High | Liver disease, Hypothyroidism |
Q types:
- Anemia with low MCV and normal RDW?
- How does RDW help differentiate IDA from thalassemia trait?
- Mentzer index formula and cutoff?
10. Key Indices & Scores
| Index | Formula | IDA | Thal trait |
|---|---|---|---|
| Mentzer Index | MCV / RBC count | > 13 | < 13 |
| England & Fraser | MCV − RBC − (5×Hb) − 3.4 | +ve | −ve |
| RDW index | MCV × RDW / Hb | High | Lower |
| Green & King | MCV² × RDW / (Hb × 100) | > 65 | < 65 |
Q types:
- Mentzer index > 13 suggests?
- Which index uses MCV, RBC count, and Hb?
⚡ Rapid-Fire High-Frequency MCQ Points
- Best initial test in anemia workup → CBC with peripheral smear
- Best test to assess iron stores → Serum ferritin (but acute phase reactant)
- Most sensitive test for iron deficiency → Serum ferritin (falls first)
- Earliest lab change in IDA → Decreased ferritin → Decreased serum iron → Decreased Hb
- Dimorphic anemia on smear → Sideroblastic anemia (most common) or mixed deficiency
- Hypersegmented neutrophil = ≥ 5-lobed in > 5% OR any 6-lobed neutrophil
- Anemia with raised EPO but no response → Aplastic anemia, ACD
- Flow cytometry (CD55/CD59 deficiency) = Gold standard for PNH
- Normal reticulocyte count in anemia = ALWAYS pathological (should be elevated)
- BM biopsy vs. aspiration — Biopsy for cellularity; aspiration for morphology
This covers the full spectrum of anemia workup MCQs expected in NEET PG 2026. Focus especially on iron studies table, RPI interpretation, PBS findings, and key diagnostic tests — these are repeatedly tested across previous years.
Do you have access to previous year nnet pg questions
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What I do have access to is a medical vector database built from textbooks and clinical guidelines (like Harrison's, standard guidelines, etc.), which is what I used to give you the topic breakdown above.
What I can help you with:
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What you'd need Marrow/PrepLadder for:
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If you paste questions here, I can help you work through them and understand the underlying concepts thoroughly.
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