title: Association of thymidine phosphorylase concentration with ultrasound-derived indices of blood flow in ovarian masses.
abstract: BACKGROUND
  The aim of this study was to determine the relationship between the concentration of thymidine phosphorylase (a known angiogenic factor) and indices of blood flow in physiologic ovarian tissues and overt (benign and malignant) tumors.
  
  
  METHODS
  The ovaries of all patients were examined by transvaginal ultrasonography, with color Doppler imaging and pulsed Doppler spectral analysis, within the 24 hours preceding laparotomy. Ovaries removed at surgery were dissected into their main components (follicles, corpus luteum, and tumor) and, where possible, into areas of high blood velocity according to the results of color Doppler imaging. The concentration of thymidine phosphorylase was measured by an enzyme-linked immunosorbent assay.
  
  
  RESULTS
  Thirty-eight tissue aliquots (16 from normal ovaries and 22 from ovarian tumors) were obtained from 33 patients. Twenty-nine tissue samples (76%) came from areas of measurable (high) blood velocity. The concentration of thymidine phosphorylase was significantly higher in tissue associated with high blood velocity (median 17.9, range 1.8-78.3 units per mg of protein vs. median 6.8, range 1.3-24.7 units per mg of protein, respectively; P < 0.05, Mann-Whitney U test). All of 8 corpora lutea, 12 of 14 benign tumors, and 7 of 7 malignant tumors had measurable blood velocity. There was a significant correlation between the concentration of thymidine phosphorylase and the peak systolic velocity in benign tumors (correlation coefficient [r] = 0.79, P < 0.01) and malignant tumors (r = 0.87, P < 0.05).
  
  
  CONCLUSIONS
  High intratumoral peak systolic velocity as determined by transvaginal color Doppler imaging and spectral analysis reflects high production of thymidine phosphorylase. This finding may aid the development of antivascular therapy for patients with ovarian carcinoma.
authors.affiliation: Department of Obstetrics and Gynecology, Shimane Medical University, Izumo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Hata
authors.forename: T
authors.initials: T
authors.lastname: Hata
authors.forename: W P
authors.initials: WP
authors.lastname: Collins
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001783:Blood Flow Velocity; D002648:Child; D003338:Corpus Luteum / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008875:Middle Aged; D010049:Ovarian Diseases / Q000000981:diagnostic imaging; D010051:Ovarian Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000201:enzymology*; D011237:Predictive Value of Tests; D013599:Systole; D013939:Thymidine Phosphorylase / Q000097:blood*; D018615:Ultrasonography, Doppler, Color
chemical_list: D013939:Thymidine Phosphorylase