A peripheral smear with increased neutrophils basophils, eosinophils, and platelets is highly suggestive of –
**Core Concept**
The peripheral smear in question is indicative of a reactive process, characterized by an increase in various myeloid and megakaryocytic cell lines, pointing towards a diagnosis of a myeloproliferative neoplasm or a reactive leukocytosis.
**Why the Correct Answer is Right**
The presence of increased neutrophils, basophils, eosinophils, and platelets on a peripheral smear suggests a reactive process, often seen in conditions like acute infection, inflammation, or myeloproliferative neoplasms. This is due to the release of various cytokines and growth factors that stimulate the proliferation and differentiation of myeloid and megakaryocytic cells. The basophilia and eosinophilia are particularly indicative of a reactive process, as these cells are typically not seen in large numbers in healthy individuals.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a peripheral smear with increased neutrophils, basophils, eosinophils, and platelets is not typically seen in iron deficiency anemia, which is characterized by a decrease in erythrocyte production and an increase in erythrocyte destruction.
**Option B:** This option is incorrect because a peripheral smear with increased neutrophils, basophils, eosinophils, and platelets is not typically seen in thrombotic thrombocytopenic purpura (TTP), which is characterized by a decrease in platelet count, microangiopathic hemolytic anemia, and renal failure.
**Option C:** This option is incorrect because a peripheral smear with increased neutrophils, basophils, eosinophils, and platelets is not typically seen in chronic lymphocytic leukemia (CLL), which is characterized by an increase in small, mature lymphocytes.
**Clinical Pearl / High-Yield Fact**
In cases of reactive leukocytosis, it is essential to investigate for underlying causes such as infection, inflammation, or myeloproliferative neoplasms. A thorough history and physical examination, along with laboratory tests such as complete blood counts, blood cultures, and imaging studies, can help identify the underlying cause.
**Correct Answer:** C.