Statistical analysis of COPD exacerbations.

cing tumour, is physiologically foreseeable owing to the sudden deprivation of catecholamines, as well as deprivation of other tumour-secreted bronchodilator substances, such as adrenomedullin [4], vasoactive intestinal peptide or pituitary adenylate cyclase-activating peptide [5]. There are, however, few reports of respiratory problems in patients with pheochromocytoma and all, in contrast to ours, had a history of asthma and/or were being treated with b-blockers [6, 7]. Our patient has, since the acute post-operative period, been feeling perfectly well. She is back in the gym on a regular basis, her cardiac frequency is normal and she has not had any further respiratory problems.