目的　探讨误诊为功能失调性子宫出血（ 功血） 的原因。方法　对我院１９８７ 年５ 月至１９９８ 年５ 月收治的２２９ 例功血患者的临床资料进行回顾性分析。结果　９１ 例患有子宫平滑肌瘤、子宫腺肌病、子宫内膜息肉、子宫内膜炎、子宫内膜癌、输卵管妊娠破裂、输卵管卵巢炎、子宫肥大症、外在性子宫内膜异位症、卵巢囊性畸胎瘤、卵巢颗粒细胞瘤、卵巢浆液性乳头状囊腺瘤、宫颈管海绵体淋巴血管瘤、卵巢滤泡囊肿、再障， 血小板减少症而致子宫出血的病人误诊为功血。结论　功血的诊断是排除性诊断， 仅靠传统的病史、妇科检查和诊断性刮宫不能确诊， 尚需结合高分辨Ｂ 超、宫腔镜、腹腔镜及内分泌检查等， 协助排除器质性病变， 最后由病理确诊， 方可降低误诊率 Objective To investigate the causes of misdiagnosis as dysfunctional uterine bleeding (dysfunctional uterine bleeding). Methods The clinical data of 229 patients with dysfunctional uterine bleeding admitted to our hospital from May 1987 to May 1998 were retrospectively analyzed. Results 91 patients with uterine leiomyomas, adenomyosis, endometrial polyps, endometritis, endometrial cancer, tubal pregnancy rupture, tubal ovarian inflammation, uterine hypertrophy, extrinsic endometriosis Ovarian cystic teratoma, ovarian granulosa cell tumor, ovarian serous papillary cystadenoma, cervical cavernous lymphohistioma, ovarian follicular cyst, aplastic anemia, thrombocytopenia caused by misdiagnosis of uterine bleeding DUB Conclusions The diagnosis of dysfunctional uterine bleeding is an exclusionary diagnosis. Only by traditional medical history, gynecological examination and diagnostic curettage can not be diagnosed, combined with high-resolution B-mode ultrasound, hysteroscopy, laparoscopy and endocrine examination, to help rule out organic disease , Finally confirmed by pathology, to reduce the misdiagnosis rate