ABSTRACT
We report a case of a woman with abnormal vaginal bleeding who had a placental site trophoblastic tumor (PSTT) detected following hysterectomy. Surgery was performed because of a large uterine arteriovenous fistula detected by transvaginal color and pulsed Doppler sonography. Color Doppler sonography revealed a lacunar-type lesion with a marked increase in uterine vascularity, and pulsed Doppler sonography demonstrated a low resistance index. This vascular pattern indicated the formation of blood lacunae and arteriovenous shunts caused by PSTT within the uterine myometrium. This is the first report to describe the ultrasound findings in a case of PSTT complicated by a uterine arteriovenous fistula.
Subject(s)
Arteriovenous Fistula/diagnostic imaging , Trophoblastic Tumor, Placental Site/diagnostic imaging , Uterine Neoplasms/diagnostic imaging , Adult , Arteriovenous Fistula/complications , Female , Humans , Magnetic Resonance Angiography , Pregnancy , Trophoblastic Tumor, Placental Site/complications , Ultrasonography, Doppler, Color/methods , Uterine Neoplasms/complicationsABSTRACT
Frequencies of pure rotational transitions of isotopic species of water, H217O, and H218O were measured in the 1-5 THz region with a high-precision far-infrared spectrometer using a tunable radiation source. Measured frequencies of more than 100 spectral lines for each species provide an excellent frequency standard for the far-infrared region. Molecular parameters based on a Watson-type Hamiltonian have been obtained to reproduce the observed frequencies. Copyright 1999 Academic Press.
