It is highly unlikely that a corpus luteum cyst will be misdiagnosed as a teratoma, but this cannot be ruled out as both corpus luteum cysts and teratomas can be found in the location of the ovary, and there are similarities between the symptoms following a rupture of the corpus luteum and teratomas. Luteal cysts are usually found inside the ovary and teratomas can also be found in the ovary, i.e., ovarian teratomas, so they can be confusing. Luteal cysts can cause early or delayed menstruation, and rupture of a luteal cyst can result in acute abdominal pain with nausea, vomiting, and a sensation of anal tenderness. Ovarian teratomas can also present with irregular periods, abdominal pain, and bloating. There are similarities in the symptoms of the two and hence it is not easy to differentiate between them. However, luteal cysts and teratomas can be distinguished by examination, for example, ultrasound of luteal cysts suggests a hypoechoic mass, while teratomas suggest a hypoechoic mass. To sum up, the possibility of misdiagnosis can not be ruled out clinically, but the chance of misdiagnosis is small, if the patient is not feeling well, it is recommended to go to a regular hospital for consultation.