Trophoblastic Diseases.

Although trophoblastic diseases were frequent in East Asia in the past, choriocarcinoma is rare at present after the introduction of effective chemotherapy and postmolar management in Japan. Molar pregnancy has also decreased, possibly due to ultrasound diagnosis and termination in early pregnancy. The outcome of the disease has greatly improved by ultrasound diagnosis, including real-time B-mode, color/power Doppler flow images, and pulsed Doppler tumor blood flow studies. [ABSTRACT FROM AUTHOR]