P21.04: Usefulness of standard deviation on the histogram of ultrasound as a quantitative value for intra ovarian tumor fluid echo texture; preliminary study

The mature cystic teratomas account for about 40-50% of all benign ovarian neoplasias. Over 80% of teratomas occur during the reproductive phase, in which women are usually asymptomatic. Ultrasound examination remains an extremely sensitive method in the diagnosis of mature teratoma. Case Report: SPB, 11 years old, apparently healthy, went to the GP in January 2009 by an increasing abdominal volume for the past six months. No other symptoms. Performed abdominal and pelvic endocavitary ultrasound, which showed: Extensive abdominal mass, right located, with cystic component and multiple regular septa, without papilla and with normal Doppler. Other abdominal and pelvic organs without structural changes. Right ovary not seen. Laboratory showed elevation of the following tumor markers: CEA (73.6 U/ml); CA 125 (73.60 U/ml) and CA 19.9 (4145 U/ ml). Surgery in February 2009 in our hospital: removal of a giant mass (about 3kg), occupying six abdominal quadrants in relation to right ovary. Other abdominal organs without macroscopic changes. Histologically, it was confirmed the presence of a right ovary mature teratoma (benign trigerminoma). Maintains follow-up in surgery consultation: clinically well, without signs of recurrence. Postoperative tumor markers normalized. Final Comment: In this case, the sonographic suspicion of a benign lesion was confirmed histologically, in the context of tumor with markers significantly changed (specifically the CA 19.9) and rapid growth.