Bilateral adrenal enlargement and non-suppressible hypercortisolism as a presenting feature of gastric cancer.
In patients with cancer, adrenal enlargement due to either metastatic disease or diffuse non-metastatic hyperplasia is increasingly recognized with modern imaging techniques. Dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis, characterized by non-suppressible hypercortisolism, has also been described in neoplasia in the absence of ectopic adrenocorticotrophic hormone (ACTH) production. In the majority of cases of malignancy-associated hypercortisolism, it might be expected that the presence of malignant disease would be clinically apparent, thus rendering a detailed endocrinological evaluation of the HPA axis unnecessary. However, in the present case we describe a patient with occult malignancy presenting with bilateral adrenocortical enlargement and non-suppressible hypercortisolism that was not due to the ectopic ACTH syndrome. There were no clinical Cushingoid features other than hypertension and new-onset diabetes mellitus. Detailed diagnostic investigations for the possibility of Cushing's syndrome were performed before the underlying diagnosis of gastric adenocarcinoma eventually became apparent. Characteristics and potential mechanisms of non-suppressible hypercortisolism in cancer are discussed. We believe that this scenario will occur with greater frequency in the future, given the increasing early use of sophisticated high-resolution imaging for the evaluation of suspected intra-abdominal pathology.
Biswas
M
M
Department of Medicine, University Hospital of Wales, Cardiff, Wales, UK.
Smith
J C
JC
Davies
J S
JS
D000230:Adenocarcinoma / Q000175:diagnosis*; D000307:Adrenal Gland Diseases / Q000175:diagnosis*; D000368:Aged; D003480:Cushing Syndrome / Q000097:blood / Q000150:complications / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D013274:Stomach Neoplasms / Q000150:complications* / Q000473:pathology*