title: Radioimmunoscintigraphy of gynecologic tumors with 131I-labeled anti-PLAP monoclonal antibodies.
abstract: Radioimmunoscintigraphy (RIS) was performed in 20 patients with gynecologic tumors, 14 ovarian, 5 cervical, and one endometrial carcinoma. One murine monoclonal antibody (mab) against placental alkaline phosphatase (H7) was used after radiolabeling with 131I. The labeling procedure yielded antibodies with specific activity varying between 60 and 73 MBq/mg mab. Each patient received 57 to 100 MBq of the preparation. RIS was performed 7 to 35 days later. Patients with ovarian adenocarcinoma had an accumulation of activity on RIS at tumor sites (79%, 11/14) verified by ultrasonography, CT, and clinical examination. A low or absent accumulation of activity was seen in patients with cervical tumors. The patient with an endometrial adenocarcinoma was seen to have an activity accumulation at RIS corresponding to tumor sites determined by ultrasound and/or CT. It is concluded that RIS using monoclonal antibodies against placental alkaline phosphatase can provide information which will supplement that gained from other investigations of patients with ovarian adenocarcinomas.
authors.affiliation: Department of Diagnostic Radiology, University of Umeå, Sweden.
authors.forename: K E
authors.initials: KE
authors.lastname: Riklund
authors.forename: G
authors.initials: G
authors.lastname: Edbom
authors.forename: R
authors.initials: R
authors.lastname: Makiya
authors.forename: B
authors.initials: B
authors.lastname: Johansson
authors.forename: U
authors.initials: U
authors.lastname: Gerdes
authors.forename: S O
authors.initials: SO
authors.lastname: Hietala
authors.forename: L
authors.initials: L
authors.lastname: Ekelund
authors.forename: T
authors.initials: T
authors.lastname: Stigbrand
authors.forename: U
authors.initials: U
authors.lastname: Stendahl
mesh_terms: D000328:Adult; D000368:Aged; D000469:Alkaline Phosphatase / Q000276:immunology*; D016889:Endometrial Neoplasms / Q000000981:diagnostic imaging; D005260:Female; D005833:Genital Neoplasms, Female / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007457:Iodine Radioisotopes; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D010920:Placenta / Q000201:enzymology*; D011859:Radiography; D016719:Radioimmunodetection
chemical_list: D007457:Iodine Radioisotopes; D000469:Alkaline Phosphatase