FDG-PET and Neuropsychiatric Symptoms among Cognitively Normal Elderly Persons: The Mayo Clinic Study of Aging.

One of the key research agenda of the field of aging is investigation of presymptomatic Alzheimer's disease (AD). Furthermore, abnormalities in brain glucose metabolism (as measured by FDG-PET) have been reported among cognitively normal elderly persons. However, little is known about the association of FDG-PET abnormalities with neuropsychiatric symptoms (NPS) in a population-based setting.

[Determination of carcinoembryonic antigen (CEA) in patients with tumors of the large intestine. Experience with a new radioimmunoassay (author's transl)].

Specimens from 93 patients with histologically confirmed tumors of the large bowel (53 single, 40 sequential determinations) were investigated by a new CEA radioimmunoassay (double antibody method, direct serum determination). Of the single and preoperative sequential determinations 37-40% were normal (below 2.5 ng/ml), one third was intermediately elevated (2.