Background: Atypical polypoid adenomyomas (APAMs) are tumors of the uterine cavity. APAMs are difficult to distinguish from endometrial polyps or submucosal myomas. An APAM is composed of atypical endometrial glands surrounded by smooth muscle.
Case: A 33-year-old woman had dysmenorrhea and hypermenorrhea. An ultrasound and MRI revealed a 2-cm tumor in the uterine cavity. The histologic diagnosis of a specimen obtained by hysteroscopic resection showed an APAM. After 1 year, an APAM recurred. Multiple polypoid lesions were resected through a hysteroscope.
Conclusion: Although difficult to diagnosis; however, a pathologic diagnosis can be made on APAMs following hysteroscopic resection.
