While evaluating the cause of Cushing's syndrome, biochemical confirmation should be sought first as imaging studies might misdirect the diagnosis toward the wrong problem. One of the rare secondary causes that should be kept in mind while evaluating Cushing's syndrome is the thymic neuroendocrine tumor.
Keywords: Cushing's syndrome; Neuroendocrine neoplasm; hypercortisolism; pituitary incidentaloma; thymic malignancies.
© 2021 The Authors. Clinical Case Reports published by John Wiley & Sons Ltd.