A 40 years old male had undergone splenectomy 20 years ago. Peripheral blood smear examination would show the presence of:
**Core Concept**
The spleen plays a crucial role in filtering the blood, removing old or damaged red blood cells (RBCs), and storing platelets and white blood cells (WBCs). A splenectomy, or removal of the spleen, can lead to an accumulation of abnormal RBCs in the peripheral blood due to the absence of splenic clearance.
**Why the Correct Answer is Right**
In the absence of the spleen, RBCs that would normally be removed due to their shortened lifespan or abnormal shape can persist in the circulation. One such RBC is the spherocyte, which is characterized by its spherical shape and reduced surface area-to-volume ratio, leading to increased hemolysis and a compensatory increase in 2,3-bisphosphoglycerate (2,3-BPG) levels. The presence of spherocytes in the peripheral blood smear is a common finding in individuals with a history of splenectomy.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the scenario of a splenectomized individual. The presence of nucleated RBCs is more commonly associated with conditions such as hemolytic anemia, bone marrow disorders, or certain infections.
**Option B:** This option is incorrect because the presence of Howell-Jolly bodies is more commonly associated with asplenia or hyposplenism, but they are not the most characteristic finding in a peripheral blood smear of a splenectomized individual.
**Option C:** This option is incorrect because the presence of Schistocytes (fragmented RBCs) is more commonly associated with microangiopathic hemolytic anemia, disseminated intravascular coagulation (DIC), or mechanical damage to RBCs.
**Clinical Pearl / High-Yield Fact**
Individuals with a history of splenectomy may experience an increased risk of infections, particularly those caused by encapsulated organisms such as Streptococcus pneumoniae and Haemophilus influenzae, due to the loss of splenic function in filtering out these pathogens.
**Correct Answer:** B.