PROS1 and neoplasm: Mycoplasma pneumoniae antibody quantification 1:40 positive; tumor biomarkers, free PSA, total PSA, AFP, CA724, CA199, G test, GM test, PCT were all negative; glycated hemoglobin, cTnT, BNP, liver and kidney function, electrolytes, thyroid function, stool routine, ECG, abdominal ultrasound, and echocardiogram did not show any significant abnormalities.