病人:男性,33岁。因“上腹胀痛不适1周,发现腹部包块3d”入院。口唇部及双手掌、手背、足底见散在黑色素沉着。浅表淋巴结不肿大。心、肺无异常。腹平软,肝、脾肋下未及,未触及包块,无压痛及反跳痛。实验室检查:WBC5.53×109/L,Hb134g/L,PLT266×109/L,CEA3.80μg/L,Ca19-92.0k