Examination of a peripheral smear demonstrates leukemia composed of small mature lymphocytes without blast forms.which of the following is most likely age of this patient?

**Core Concept**
The underlying principle being tested is the correlation between the morphological characteristics of leukemia cells and the age of the patient. **Chronic Lymphocytic Leukemia (CLL)** is a type of leukemia characterized by the accumulation of small, mature-appearing lymphocytes.

**Why the Correct Answer is Right**
Given that the peripheral smear shows leukemia composed of small mature lymphocytes without blast forms, this is suggestive of **CLL**. **CLL** is most commonly diagnosed in adults, typically in individuals older than 60 years. The absence of blast forms further supports this diagnosis, as **CLL** is characterized by mature lymphocytes.

**Why Each Wrong Option is Incorrect**
**Option A:** This age group is too young for the typical presentation of **CLL**.
**Option B:** While possible, this is less likely than an older age.
**Option C:** This option might be considered but is not the most likely age range for **CLL** diagnosis.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that **CLL** is rare in children and young adults, making an older age more likely at diagnosis.

**Correct Answer:** D. older than 60 years

✓ Correct Answer: D. 65years