恶性肌母细胞瘤较少见,多发生于四肢、舌、乳腺、腹膜后、结肠、膀胱等处;发生于女性尿道口者更较罕见,现将我科可见一例报告如下: 患者:李××,女性,30岁,86年1月30日入院,患者因尿道口肿块,时有出血,疼痛8个月,在8个月前,妇科检查时发现尿道口有一肿块,后逐渐增大,近3个月来增长速度加快,并传有出血,疼痛,但无尿频,尿急;排尿无影响,入院前1月在门诊经抗炎治疗无效,而拟诊“尿道息肉”收入院。泌尿外科情况,外阴正常,尿道外口6点处见一蚕豆大小肿块突出皮肤表面,约0.5×1.3×0.5cm大小,基广且较深,质较硬,表 Malignant myocytoma is rare, occur in the limbs, tongue, breast, retroperitoneum, colon, bladder, etc .; occurred in the female urethra are more rare, we can see a case report is as follows: Patients: Lee × ×, female, 30 years old, January 30, 1986 admission, patients with urethral bumps, sometimes bleeding, pain for 8 months, 8 months ago, gynecological examination found a urethral orifice, and then gradually increased, The past three months to accelerate the growth rate, and there is bleeding, pain, but no pollakiuria, urgency; no effect of urination, hospitalized in January before anti-inflammatory treatment in the clinic invalid, and the proposed diagnosis of “polyp” income hospital. Urology, normal vulva, urethral orifice at 6 o’clock to see a broad bean mass lump prominent skin surface, about 0.5 × 1.3 × 0.5cm size, based on the broader and deeper, the quality of hard, the table