title: Intramural pregnancy with negative maternal serum beta-hCG. A case report.
abstract: BACKGROUND
  Intramural pregnancy is the rarest form of ectopic pregnancy. The diagnosis depends upon the sonographic finding of intramural gestational sac-like growth and persistent high beta-human chorionic gonadotropin (beta-hCG) levels after dilatation and curettage. No authors mentioned negative beta-hCG result in such situation. Rarely has the literature contained preoperative sonograms and photographs of postoperative gestational tissue.
  
  
  METHODS
  A 31-year-old woman presented with vaginal spotting for five months. Six months earlier she underwent dilatation and curettage for blighted ovum at 8 weeks' gestation. Since then, incidental vaginal spotting was noted. Sonography demonstrated an intramural cyst with fetal pole-like growth. Serum beta-hCG, diagnostic dilatation and curettage, and hysteroscopic examination were negative. Laparotomy for excision of the cyst confirmed an intramural pregnancy.
  
  
  CONCLUSIONS
  Because of the long period after fetal wastage, negative serum beta-hCG was noted in this case. Negative serum beta-hCG was unreliable in the exclusion of intramural pregnancy. With the sonographic appearance of intramural gestational sac-like growth, in spite of a negative serum beta-hCG the clinician should be alert to the possibility of intramural pregnancy.
authors.affiliation: Department of Obstetrics and Gynecology, China Medical College Hospital, Taichung, Taiwan, R.O.C.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Hsieh
authors.forename: C C
authors.initials: CC
authors.lastname: Chang
authors.forename: H D
authors.initials: HD
authors.lastname: Tsai
authors.forename: L S
authors.initials: LS
authors.lastname: Yeh
authors.forename: T Y
authors.initials: TY
authors.lastname: Hsu
authors.forename: T C
authors.initials: TC
authors.lastname: Yang
mesh_terms: D000328:Adult; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood*; D004107:Dilatation and Curettage; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D014463:Ultrasonography
chemical_list: D018997:Chorionic Gonadotropin, beta Subunit, Human