A patient scheduled for extraction has a platelet count of approximately 20,000/mm3, HbA1c of 7.5%, and blood pressure of 150/95. Which finding requires investigation and management FIRST?

Correct answer: B. The platelet count

• A. Blood pressure of 150/95 is stage 2 hypertension warranting monitoring and referral for management, but it does not create an acute intraoperative hazard the way severe thrombocytopenia does.
• B. CORRECT. A platelet count of 20,000/mm3 is SEVERE thrombocytopenia (normal 150,000–450,000). Spontaneous bleeding risk becomes significant below 20,000, and surgical procedures generally require at least 50,000 (some sources say 80,000–100,000 for more extensive surgery). This is the finding that could produce life-threatening hemorrhage from a simple extraction. It demands hematology consultation and possibly platelet transfusion before any surgery.
• C. An HbA1c of 7.5% is modestly above target but does not preclude extraction.
• D. Proceeding without addressing a platelet count of 20,000 would be indefensible.

Note: Rough platelet thresholds: >100,000 normal surgery; 50,000–100,000 minor procedures with local measures; <50,000 consult; <20,000 spontaneous bleeding risk.