M/39
Chief complaint: Repeatedly pass tarry stools with dizzy in the half-moon.
※ Laboratory examination: fecal occult blood(positive); blood routine examination: hematid（2.93，L，1012/L）; hemoglobin（60，L，g/L）; tumor markers(CEA and AFP) are all normal.
※ Accessory examination: ①gastroscope: chronic superficial gastritis. ②electronic colonoscope: No abnormality seen in the large intestine.
PET/CT示： Irregularly nodosity incrassation(the thickness is1.3cm, CT value of23.2Hu ) in the segmental intestinal wall of the small intestine in cavitas pelvis,with filling defect and normal FDG uptake. There is no evidence of any FDG avid perifocal or retroperitoneal lymphadenopathy.