Decrease in white blood cells, red blood cells, and platelets indicates adverse effects in which system?

Decrease in white blood cells, red blood cells, and platelets indicates adverse effects in which system?

• A. GI side effects
• B. CNS side effects
• C. Urinary system side effects
• D. Hematology side effects

Answer: (D)

A single idea tested here is that suppression of all three major blood cell types—white blood cells, red blood cells, and platelets—points to the hematologic system, usually from bone marrow suppression. When WBCs fall, infection risk increases; when RBCs fall, fatigue, pallor, and shortness of breath can occur; when platelets fall, there’s a higher risk of bleeding and bruising. Seeing decreases in all three lines is characteristic of hematologic toxicity, sometimes called pancytopenia due to bone marrow suppression. Other systems describe different symptom patterns—gastrointestinal side effects involve nausea, vomiting, or diarrhea; CNS effects involve dizziness or confusion; urinary system effects involve changes in urination or bladder symptoms. These do not explain a broad suppression of blood cell lines.

A single idea tested here is that suppression of all three major blood cell types—white blood cells, red blood cells, and platelets—points to the hematologic system, usually from bone marrow suppression. When WBCs fall, infection risk increases; when RBCs fall, fatigue, pallor, and shortness of breath can occur; when platelets fall, there’s a higher risk of bleeding and bruising. Seeing decreases in all three lines is characteristic of hematologic toxicity, sometimes called pancytopenia due to bone marrow suppression.

Other systems describe different symptom patterns—gastrointestinal side effects involve nausea, vomiting, or diarrhea; CNS effects involve dizziness or confusion; urinary system effects involve changes in urination or bladder symptoms. These do not explain a broad suppression of blood cell lines.