Monoclonal antibody MAb-170 for immunoscintigraphic detection of ovarian tumors.
OBJECTIVE
The technetium Tc 99m-labeled monoclonal antibody MAb-170 was designed for diagnostic use in patients with gynecologic adenocarcinoma. Our investigation was initiated to verify its usefulness for radioimmunoscintigraphy of ovarian tumors.


METHODS
Most of the 82 patients participating in this study underwent immunoscintigraphy before first-look surgery.


RESULTS
Radioimmunoscintigraphy recognized 36 of 41 patients with adenocarcinoma of the ovaries, corresponding to an overall sensitivity of 88%. Specificity was 90% (38/42). The calculation of accuracy gave a result of 89% (74/83). Of 110 known lesions, 92 were visualized successfully; thus the local-regional sensitivity was 84%. Of 160 benign tumor sites, 154 showed no evidence of tracer accumulation, corresponding to a local-regional specificity of 96%. The smallest lesion visualized was an adenocarcinoma of the corpus uteri with a diameter of 1.5 cm.


CONCLUSIONS
The monoclonal antibody MAb-170 is a promising radiopharmaceutical for immunoscintigraphy of ovarian adenocarcinoma.
Alexander
C
C
Department of Nuclear Medicine, Saarland University Medical Center, Homburg, Germany.
Villena-Heinsen
C E
CE
Schaefer
A
A
Toth
L
L
Schmidt
W
W
Kirsch
C M
CM
D000230:Adenocarcinoma / Q000000981:diagnostic imaging*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm / Q000276:immunology; D005260:Female; D006801:Humans; D007158:Immunologic Techniques; D007633:Keratins / Q000276:immunology; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D012680:Sensitivity and Specificity; D013667:Technetium
D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D007633:Keratins; D013667:Technetium