Lissoni P, Bastone A, Sala R, Mauri R, Rovelli F, Viviani S, Bajetta E, Esposti D, Esposti G, di Bella L, et al.
The oncological patients showed higher mean melatonin serum levels than the control subjects. Mlt values were lower in patients with solid tumours who had metastases. Chemotherapy caused a decre- ase. Surgery was followed by a fall in melatonin in patients without metastases.