A patient undergoing chemotherapy after surgery develops thrombocytopenia. Which clinical finding should the nurse prioritize reporting to the healthcare provider?

Rationale: A. Slightly elevated temperature of 37.8°C without other symptoms is incorrect because this finding is more concerning for infection (especially in neutropenia) rather than thrombocytopenia, and the temperature is only mildly elevated. While it should be monitored, it is not the priority related to low platelets. B. Patient reports mild fatigue and weakness but no bleeding is incorrect because fatigue is a common, nonspecific side effect of chemotherapy and does not indicate an immediate complication of thrombocytopenia. C. Presence of petechiae and mucosal bleeding (eg, bleeding gums) is correct because these are classic signs of thrombocytopenia and indicate an increased risk of significant bleeding. Active bleeding requires prompt reporting and intervention to prevent life-threatening hemorrhage. D. Platelet count decreased to 80,000/mm² without any bleeding signs is incorrect because mild to moderate thrombocytopenia without bleeding is often monitored rather than urgently treated. The presence of bleeding is a higher priority than the laboratory value alone.