非嗜铬性付神经节瘤(Nonchromaffin Paraganglioma)或称化学感受器瘤(Chemodectoma),多为良性,恶性罕见。全身多处均可发生,而发生于大网膜的尚无报告。我们见到一例,报告如下。王××,男,40岁,农民。因右中腹部包块10年,于1978年3月18日入院。患者10年前,发现右中腹部有一活动性鸡蛋大硬性包块,不疼。近年包块长大,伴胀痛。查体:脉搏70次/分,血压100/70毫米汞柱,右中腹有18×16×16厘米~3大小之硬性包块,扪 Nonchromatotropic Paraganglioma or Chemodectoma are mostly benign and malignant. Many parts of the body can occur, but no report has occurred in the omentum. We have seen one case and the report is as follows. Wang X, male, 40 years old, farmer. The right middle and middle abdominal mass was admitted to hospital on March 18, 1978 for 10 years. A patient 10 years ago, he found that there was a large, rigid mass of active eggs in the right mid-abdomen and it did not hurt. In recent years, the masses grew up, with pain. Physical examination: pulse 70 beats/min, blood pressure 100/70 mm Hg, right middle abdomen with 18 × 16 × 16 cm ~ 3 size hard mass,