If a teratoma recurs, in cases of benign teratomas, generally there are no symptoms. Symptoms only arise when the tumor grows large enough to compress the bladder and intestines, which might induce signs of bladder and rectal irritation. Additionally, a teratoma might undergo torsion due to changes in body position, causing sudden lower abdominal pain. If it is a malignant teratoma, there might not be noticeable symptoms early on. The recurrence of a teratoma can only be detected through regular monitoring with ultrasound and tumor markers; there are no better methods available.