Autoimmune hemolytic anemia is seen in -a) Sickle cell anemiab) Chronic lymphocytic leukemia (CLL)c) Acute myelocytic leukemia (AML)d) Multiple myeloma

## **Core Concept**
Autoimmune hemolytic anemia (AIHA) is a condition where the immune system produces antibodies against the red blood cells, marking them for destruction. This results in hemolysis and anemia. AIHA can be associated with various underlying conditions, including autoimmune disorders, infections, and certain types of cancers.

## **Why the Correct Answer is Right**
The correct answer, **B) Chronic lymphocytic leukemia (CLL)**, is associated with autoimmune hemolytic anemia. CLL is a type of cancer that affects the blood and bone marrow, characterized by the production of an excessive number of immature white blood cells. One of the complications of CLL is the development of autoimmune phenomena, including AIHA. The abnormal immune response in CLL can lead to the production of autoantibodies against red blood cells.

## **Why Each Wrong Option is Incorrect**
- **Option A: Sickle cell anemia** is a genetic disorder that affects hemoglobin production, leading to abnormal red blood cells. While it causes hemolysis, it is not primarily an autoimmune condition.
- **Option C: Acute myelocytic leukemia (AML)** is a type of cancer that originates in the bone marrow but is not commonly associated with autoimmune hemolytic anemia. AML can cause various complications, including infections and bleeding disorders, but AIHA is not a hallmark.
- **Option D: Multiple myeloma** is a cancer of plasma cells in the bone marrow. It can lead to anemia, but the anemia is usually due to bone marrow infiltration or myelophthisis rather than autoimmune hemolysis.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that autoimmune hemolytic anemia can be a complication of CLL, and the presence of AIHA can significantly impact the management and prognosis of CLL patients. Screening for autoimmune complications is part of the comprehensive management of CLL.

## **Correct Answer: B. Chronic lymphocytic leukemia (CLL)**