1. Tumor rupture
Approximately 3% of ovarian tumors may rupture, and ovarian tumors can undergo torsion of the pedicle, with rupture being of traumatic and spontaneous types. Traumatic rupture often occurs due to abdominal blows, delivery, sexual intercourse, gynecological examination, and puncture, while spontaneous rupture is often due to rapid growth of the tumor, with most cases being infiltrative growth of the tumor piercing the cyst wall. The severity of symptoms depends on the size of the rupture, the nature and quantity of the fluid that enters the abdominal cavity, and the cyst. In the case of small cysts or simple serous cystadenomas, the patient may only experience mild abdominal pain. In the case of large cysts or mature teratoma, rupture often leads to severe abdominal pain, nausea and vomiting, and sometimes internal hemorrhage, peritonitis, and shock.
Gynecological examination may reveal abdominal tenderness, muscle tension, or signs of ascites, as well as the original mass being unpalpable or palpable as a reduced, flat mass. Immediate laparotomy should be performed if tumor rupture is suspected. During the operation, it is advisable to aspirate the cyst fluid as much as possible, make a smear for cytological examination, clean the abdominal and pelvic cavities, and remove the specimen for pathological examination, with particular attention to whether there is malignant change at the edge of the break.
2. Infection
Less common, often caused by tumor torsion or rupture, or can come from adjacent organ infection foci such as appendiceal abscess spread. Clinical manifestations include fever, abdominal pain, mass, abdominal tenderness, muscle tension, and elevated white blood cell count. Treatment should first be with antibiotics, followed by surgical resection of the tumor. If infection cannot be controlled within a short period, immediate surgery should be performed.
3. Pedicle torsion
It is common and is one of the gynecological acute abdominal conditions. About 10% of ovarian tumors are complicated by torsion. It is more common in cystic tumors with long pedicles, moderate size, high mobility, and a center of gravity偏向一侧, occurring more often during sudden changes in body position, in the early stages of pregnancy, or after delivery. The pedicle of the ovarian tumor consists of the infundibulopelvic ligament, the ovarian固有ligament, and the fallopian tube. After acute torsion, venous return is obstructed, leading to severe congestion within the tumor or vascular rupture, causing the tumor to rapidly increase in size, intratumoral hemorrhage, and eventually leading to obstruction of arterial blood flow, necrosis of the tumor, and a purple-black discoloration, which is prone to rupture and secondary infection.
The typical symptom is sudden onset of severe lower abdominal pain, often accompanied by nausea, vomiting, and even shock, which is caused by peritoneal traction and strangulation. Gynecological examination reveals a mass with high tension and tenderness, most prominent at the pedicle, with muscle tension. Sometimes the torsion may naturally reset, and abdominal pain may subside accordingly. Once torsion is diagnosed, laparotomy should be performed as soon as possible.
4. Malignant transformation
Malignant transformation of benign ovarian tumors often occurs in older individuals, especially postmenopausal women, where the tumor rapidly increases in size within a short period, causing abdominal distension, loss of appetite, and a significantly increased tumor volume, which is fixed and often accompanied by ascites. In cases suspected of malignant transformation, timely treatment should be sought.