title: Tubal ectopic pregnancy associated with an adenomatoid tumor.
abstract: We present a case of coexistence of an ectopic pregnancy and an adenomatoid tumor in the same fallopian tube. The adenomatoid tumor is the most common benign neoplasm of the fallopian tube, and the vast majority of ectopic pregnancies occur in the fallopian tube. However, coexistence of these two conditions is extremely rare, and there has been only one previously reported case in the English literature. In the present case, the placental tissue, consisting of chorionic villi and decidua, was present in the ampulla, and the adenomatoid tumor was found in the myosalpinx, just proximal to the implantation site, replacing a large part of the myosalpinx. The close spatial relationship of these two lesions suggests that an adenomatoid tumor could have interfered with transportation of the fertilized ovum through the tube, possibly via impaired contractile activity of the myosalpinx, and consequently caused the ectopic tubal pregnancy.
authors.affiliation: Department of Pathology, Miyazaki Medical College, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Inoue
authors.forename: K
authors.initials: K
authors.lastname: Nabeshima
authors.forename: Y
authors.initials: Y
authors.lastname: Shimao
authors.forename: Y
authors.initials: Y
authors.lastname: Akiyama
authors.forename: T
authors.initials: T
authors.lastname: Ohtsuka
authors.forename: M
authors.initials: M
authors.lastname: Koono
mesh_terms: D000236:Adenoma / Q000737:chemistry / Q000150:complications / Q000473:pathology* / Q000601:surgery; D000328:Adult; D014408:Biomarkers, Tumor / Q000032:analysis; D005185:Fallopian Tube Neoplasms / Q000737:chemistry / Q000150:complications / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D011247:Pregnancy; D011252:Pregnancy Complications, Neoplastic; D011271:Pregnancy, Ectopic / Q000150:complications / Q000473:pathology* / Q000601:surgery
chemical_list: D014408:Biomarkers, Tumor