附件肿块，是指子宫附件组织中生长肿物，通常位于卵巢和输卵管中。它可能是良性或恶性的。

绝经期后妇女身体中的子宫附件疾病通常包括卵巢囊肿、子宫外孕、良性或恶性肿瘤、子宫内膜瘤、多囊卵巢和输卵管卵巢脓肿。大多数的病例为卵巢滤泡囊肿和黄体囊肿。其他类型的肿物包括有子宫内膜瘤、多囊卵巢、输卵管卵巢脓肿。这些疾病也可能由于癌症、子宫肌瘤、纤维瘤和支囊囊肿引起。

An adnexal mass is a lump in tissue of the adnexa of uterus (structures closely related structurally and functionally to the uterus such as the ovaries, fallopian tubes, or any of the surrounding connective tissue). Adnexal masses can be benign or cancerous, and they can be categorized as simple or complex. One of the most important factors used to determine the clinical suspicion of malignancy of an adnexal mass is the sonographic appearance of the mass. Indications that the mass is at a higher risk of being malignant include: presence of loculations, nodules, papillary structures, septations, size greater than 10 cm.