Question

A 25-year female presented with mild pallor and moderate hepatosplenomegaly. Her hemoglobin was 92 g/l and fetal hemoglobin level was 65%. She has not received any blood transfusion till date. She is most likely to be suffering from:

• A. Thalassemia major.
• B. Thalassemia intermedia.
• C. Hereditary persistent fetal hemoglobin, homozygous state.
• D. Hemoglobin D, homozygous state.

Hint:

True homozygous HPFH is clinically silent; anemia plus splenomegaly favors thalassemia intermedia.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
A 25 year old woman has mild anemia (hemoglobin 9.2 g/dL), a big spleen and liver, very high fetal hemoglobin (HbF 65%), and she has never needed a transfusion. We need the diagnosis that best fits this picture.

Step 2: Key Concept:
Thalassemia major needs regular transfusions from early childhood because the anemia is severe, so a 25 year old who has never been transfused cannot have thalassemia major.
Thalassemia intermedia is a milder form. Patients make enough hemoglobin to survive without regular transfusions, but they still have chronic mild to moderate anemia, hepatosplenomegaly from extra blood cell production in the liver and spleen, and raised HbF, often reaching well above 50 percent in some genetic subtypes.
Homozygous hereditary persistent fetal hemoglobin (HPFH) is different: here active gamma globin genes compensate so completely for the missing adult hemoglobin production that patients are hematologically almost normal, usually without anemia or hepatosplenomegaly.

Step 3: Detailed Explanation:
This patient has real anemia (Hb 9.2 g/dL) and organ enlargement (hepatosplenomegaly), both signs of ongoing red cell destruction and compensatory blood formation outside the marrow. That pattern matches thalassemia intermedia, where an imbalance between alpha and non-alpha globin chains still damages red cells despite the raised HbF.
True homozygous HPFH does not usually cause anemia or organ enlargement, because the compensation by HbF is complete, such patients are picked up incidentally on a routine blood count, not because they are unwell. An HbF of 65 percent together with clinical illness fits a thalassemic process with high HbF rather than a silent, clinically normal HPFH homozygote.

Step 4: Why the other options are wrong:
Thalassemia major is ruled out because she has never been transfused and is alive at 25 with only mild pallor, this degree of anemia tolerance argues strongly against major disease.
Homozygous HPFH usually shows no anemia and no hepatosplenomegaly, so it does not fit a patient with pallor and organ enlargement.
Homozygous hemoglobin D disease does not raise HbF to 65 percent, HbD variants behave more like a mild hemolytic state without this degree of fetal hemoglobin elevation.

Step 5: Final Answer:
The combination of transfusion independent chronic anemia, hepatosplenomegaly, and markedly raised HbF fits thalassemia intermedia.
\[ \boxed{\text{Thalassemia intermedia}} \]

Note on the answer key: The paper's printed key lists homozygous HPFH, but true homozygous HPFH is clinically silent, with no significant anemia or hepatosplenomegaly, since HbF fully substitutes for adult hemoglobin. Given this patient's clinical anemia and hepatosplenomegaly, thalassemia intermedia is the better fit and is used as the answer here.