Signet ring cell/histiocytoid carcinoma是一种高度异质性的肿瘤,以黏液分泌和特殊细胞形态为特征。其生物学行为、分子特征及预后显著依赖于原发器官。诊断需结合形态学、免疫组化及分子检测,并与淋巴瘤、黑色素瘤等鉴别。胃部病例恶性程度最高,需积极治疗;皮肤或眼睑原发病例需警惕局部复发。
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