If the examination reveals a 43x26mm occupancy in the adnexal area, it may be an ovarian cyst. Ovarian cysts are cystic structures formed within or on the surface of the ovary due to stimulation by environmental and hormonal factors, including physiological cysts such as corpus luteum cysts and follicular cysts and pathological cysts such as teratomas and ovarian chocolate cysts. 1. Physiological cysts: follicular cysts and corpus luteum cysts are formed as a result of cyclic changes in the ovaries, and the echogenicity of the cysts is uniform in ultrasound, and they can disappear on their own after 2~3 menstrual cycles. 2. Pathologic cysts: (1) teratoma: it is mostly due to the formation of embryonic cells, and the distribution of grease, hair or bone can be seen in the cyst, and the ultrasound examination can find localized strong echoes of star pattern. (2) Ovarian chocolate cysts: this disease is a type of endometriosis, ectopic endometrium planted in the ovary, with the ovarian cycle changes and local bleeding and other manifestations, over time will form a cyst-like occupation, ultrasound performance is mud-like echoes. For gynecological ultrasound examination found in the adnexal area of 43x26mm occupation, it is necessary to be vigilant about the occurrence of ovarian cysts, it is recommended that patients go to the gynecology department of the regular hospital, clear cause of the cause of the disease under the guidance of the doctor active treatment.