<s>[INST] Im 42 had no period for 2 years, then got one last Sunday, day 13 of bleeding.  Dr did EMB, came out fine.  Transvaginal us sowed enlarged left ovary 6.5 x 3.4 x 3.8 cm, witChatDoctorplex cyst 3.5 x 5.8 x 3.3 cm no free fluid in the couldve sac, etiologies could include endometrioma.  Did ca125 yesterday, waiting for results.  Doing 6 wk follow p ultrasound.  Initial blood showed not menopausal.  Dr says may be ovarian failure?  EMB doesnt check ovaries.  Sound like this might be ovarian cancer related? Just curious of my chances of it being so?  Thank you [/INST] Hi, Complex cyst are often suspicious. Possibility of cancerous lesion can be better interpreted by radiologist doing the ultrasound. You should consult your radiologist for more detailed discussion. CA-125 report should also be checked though it is a non-specific test sometimes can help to add information in case of diagnostic dilemma. Right now nothing to worry about. We have to wait for the CA-125 report in case of any suspicion additional imaging like CT scan may also be necessary. </s>