There is a definite difference between an adnexal cyst and an adnexal mass; an adnexal cyst usually refers to a cystic substance whose internal composition is predominantly fluid. An adnexal mass, on the other hand, is a common term that usually refers to a cyst or solid mass on the adnexa. 1. Adnexal cyst: An adnexal cyst is more commonly referred to as a cystic substance in the adnexal area, usually with a cystic wall and contents. The cystic wall of adnexal cysts is usually thin, and the content is usually liquid material, such as liquefied necrosis produced by inflammation, inflammatory exudation, or physiological corpus luteum cysts or endometriosis cysts. 2. adnexal mass: adnexal mass is more extensive, but usually indicates the presence of cystic or solid masses in the adnexal region, such as benign or malignant tumors or physiological cysts. The scope of adnexal mass is a bit wider, and adnexal cyst is a bit narrower. When adnexal cyst or adnexal mass is present, it is recommended to consult a doctor in time for further examination and treatment.