99mTc-labeled monoclonal anti-carcinoembryonic antigen antibody (BW 431/26). Clinical results in the detection of colorectal carcinomas and recurrences.
With the introduction of 99mTc-labeled monoclonal antibodies against carcinoembryonic antigen (CEA) a clinically relevant extension can be expected in the diagnosis of colorectal tumors by immunoscintigraphy (IS). This study comprises a total of 49 patients (primary colorectal tumors, occult neoplasms, and suspicious recurrences), in whom IS with 99mTc monoclonal antibody (MAb) BW 431/26 was performed. After injection of 1100 MBq 99mTc MAb BW 431/26 a whole-body scan was performed in anterior and posterior projection 5 1/2 h later, and SPECT of the abdominal region was done after 6 and 24 h. In the course of primary tumor identification (n = 20) all coloscopically diagnosed and operatively verified carcinomas were confirmed and correctly localized by IS (n = 11). In three patients with positive IS and suspicious coloscopic findings surgery was refused by patients and relatives. In five cases IS was true negative and in 1 case false positive. In the diagnosis of recurrences (n = 29) IS showed an uptake in computer-tomographically and coloscopically suspicious areas in 17 cases. In 12 cases IS was rated negative (11 true-negative findings in scar and granulation tissue, 1 false-negative finding in para-aortal lymph nodes). Elevated serum CEA levels were found only in 17 of 31 patients with true-positive IS. In postoperative cancer care IS with 99mTc-labeled anti-CEA antibody plays a preeminent role in the exclusion or identification of colorectal recurrences.
Lind
P
P
Internal Dept., Barmherzige Brüder Eggenberg Hospital, Graz, Austria.
Langsteger
W
W
Költringer
P
P
Lechner
P
P
Beham
A
A
Arian Schad
K
K
Eber
O
O
D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal / Q000008:administration & dosage*; D002272:Carcinoembryonic Antigen / Q000032:analysis*; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging / Q000276:immunology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging / Q000276:immunology; D011877:Radionuclide Imaging; D012004:Rectal Neoplasms / Q000000981:diagnostic imaging / Q000276:immunology*
D000911:Antibodies, Monoclonal; D002272:Carcinoembryonic Antigen