Dopamine excretion in benign pheochromocytoma.

Dopamine excretion is reported in 27 patients with benign pheochromocytoma. In 21 patients the tumours were in the adrenal (one patient, bilateral), four were extra-adrenal, and two were assumed to be so since they were not found at laparotomy. Dopamine excretion was found to be higher in the patients with extra-adrenal tumours and in one patient--with bilateral pheochromocytoma. Slight increase of dopamine excretion was found in two of the remaining patients. These observations--indicate that while increased dopamine excretion may be present in patients with malignant pheochromocytoma it can be also increased in some patients with benign tumours.