The peripheral blood smear of a patient shows features of thalassemia, also presented with anemia. Family history is also +ve. The investigation was done to establish the diagnosis is –
**Core Concept:**
Thalassemia is a group of inherited hemoglobin disorders characterized by reduced or absent production of one of the globin chains (α or β) in the adult hemoglobin (HbA). Anemia, characteristic features of peripheral blood smear, and positive family history are common clinical findings in thalassemia.
**Why the Correct Answer is Right:**
The correct answer is D (hypochromic microcytic red cells with increased reticulocytes, target cells, and ring sideroblasts). These features are indicative of reduced hemoglobin synthesis due to decreased production of globin chains. In thalassemia, the peripheral blood smear shows these changes as a result of ineffective erythropoiesis and hemolysis.
**Why Each Wrong Option is Incorrect:**
A (Macrocytic anemia with raised reticulocyte count) is incorrect as it describes macrocytic anemia, typically seen in vitamin B12 or folate deficiency or myeloproliferative disorders.
B (Normocytic normochromic red cells) is incorrect as it describes normal erythrocyte size and color, which is not consistent with thalassemia.
C (Macrocytic anemia with raised reticulocyte count) is incorrect as it describes macrocytic anemia, typically seen in vitamin B12 or folate deficiency or myeloproliferative disorders, not thalassemia.
**Clinical Pearl:**
The diagnosis of thalassemia should be considered in patients presenting with anemia and positive family history, particularly in endemic areas. A thorough clinical assessment, including peripheral blood smear examination, is essential to make a conclusive diagnosis and guide the appropriate management.