Cushing Syndrome due to Ectopic Adrenocorticotropin Secretion by Oncocytic Thyroid Nodule

A 60-yr-old woman presented with osteoporosis and atraumatic fractures of the spine and ribs in our neurological hospital in Linz, Upper Austria. She had a clinical history of bipolar affective disorder and cognitive decline, but the actual medical problem was lumbar pain. Treatment for osteoporosis already included bisphosphonates, vitamin D, and calcium. Endocrine evaluation for secondary osteoporosis revealed low TSH (0.17 U/ml) under...