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Summary  Factitious Cushing’s syndrome (CS) is a very rare form of Münchausen syndrome. Its presentation and course are extremely heterogeneous, and diagnosis is generally challenging. We report the case of a 52-year-old woman who was initially investigated because of the occurrence of cushingoid features. Nevertheless, endocrine work-up showed very low morning plasma ACTH and serum cortisol levels. In addition, it also demonstrated central hypopituitarism and hypogonadotropic hypogonadism. Head MRI showed a small pituitary mass. Based on these results, and probably overlooking the initial clinical suspicion, general practitioner (GP) referred the patient to our Endocrine Unit for hypopituitarism. At inspection, moon face, central obesity, and bruising were evident. Multiple ulcerative skin lesions were also concentrated in the right arm and leg. Dermatology evaluation suggested that the lesions were self-provoked. For several days, the patient denied the assumption of corticosteroids, but we finally discovered that the GP’ nurse had prescribed betamethasone without the GP’s knowledge for about 2 years. In conclusion, the surreptitious assumption of corticosteroids is very rare, but the physicians should be aware that pituitary function could be impaired by high doses of corticosteroids, mimicking hypopituitarism. In these patients, a multidisciplinary approach and environmental investigation can be useful to diagnose factitious CS.    Learning points    Surreptitious assumption of corticosteroids can cause heterogeneous presentation, ranging from Cushing’s syndrome to multiple hypopituitarism.    Suppression of ACTH and cortisol levels in a patient with cushingoid features firstly suggests surreptitious assumption of corticosteroids.    A multidisciplinary approach can be extremely useful in patients with suspected factitious Cushing’s syndrome.    Sometimes, to prove surreptitious assumption of corticosteroids needs environmental investigation.

Factitious Cushing’s syndrome, hypopituitarism, and self-provoked skin lesions: when the skin mirrors the soul