Latamoxef-induced severe thrombocytopenia during the treatment of pulmonary infection:A case report

BACKGROUND Latamoxef shows excellent antibacterial activity against anaerobic bacteria such as Bacteroides fragilis.Reports of thrombocytopenic toxicity of latamoxef are limited.This report presents a case of severe thrombocytopenia possibly induced by latamoxef,an infrequent adverse drug reaction in a young patient with tuberculosis and Crohn's disease in China.CASE SUMMARY We reported a case of severe thrombocytopenia induced by latamoxef in a 28-year-old man with tuberculosis and Crohn's disease.On admission,the patient presented with a cough productive of bloody sputum,a chest computed tomogram suggested scattered mottled,high-density shadows in both lungs.Laboratory tests indicated a platelet count of 140000/μL.Considered a pulmonary bacterial infection,the patient received anti-infection therapy with latamoxef(dose:2.0 g)intravenously Q12h.On the 9th day of treatment,the platelet count decreased to 44000/μL.On the 12th day,scattered purpura and ecchymosis appeared on the patient’s limbs and trunk,and the platelet count decreased to 9000/μL after latamoxef treatment for 15 d.Three days after discontinuation of latamoxef,the platelet count recovered to 157000/μL,and the area of scattered purpura and ecchymosis on the limbs and trunk decreased.The platelet counts remained in the normal range,and no thrombocytopenia was found at follow-up 15 mo after discharge.CONCLUSION For patients treated with latamoxef,platelet counts should be carefully followed,and caregivers should be vigilant for the appearance of scattered ecchymosis.