原发性腹膜后肿瘤的发病率很低 ,约 0 .3～ 0 .7/ 10万 [1 ] 。我科于 2 0 0 1年 7月收住 1例腹膜后神经纤维瘤 ,现报道如下。1　临床资料患者男 ,19岁 ,2 0 0 1年 7月以右上腹包块 6年为主诉入院。患者 6年前 B超检查发现上腹部肝肾间隙肿块 ,在外院做剖腹探查 ,行部分肿块切 The incidence of primary retroperitoneal tumor is very low, about 0 .3 ~ 0. 7/100 000 [1]. My department in July 2001 admitted 1 case of retroperitoneal neurofibroma, are reported below. 1 clinical data Male patient, 19 years old, July 2001 to the right upper quadrant mass for 6 years admitted to hospital. 6 years ago, B-ultrasound in patients with upper abdominal liver and kidney space lumps, laparotomy in the outer court to do some mass