title: [Osteoporosis: diagnosis or sign of suspicion?].
abstract: OBJECTIVE
  We present the case of a fifty-year-old male who presented at the Neurology Service. During the previous months he had noticed progressive cognitive deterioration, and particularly a loss of memory and executive abilities, as well as proximal weakness of the four limbs and lumbar tenderness. He had lost ten centimetres of height. A bone densitometry was performed, which showed early osteoporosis.
  
  
  CONCLUSIONS
  The laboratory results showed an increase in urine cortisol excretion (1725 g/24h), with detectable plasma ACTH concentration (89 pg/ml), suggesting ACTH-dependent Cushing's syndrome, Additional tests were run in order to determine a hypothalamic or ectopic location of the syndrome. To this end, a bilateral inferior petrosal sinus sample (BIPSS) was performed for ACTH determination. BIPSS is the test that has been proven to have the best sensitivity to achieve differential diagnosis of ACTH-dependent Cushing's syndrome.
authors.affiliation: Departamento de Endocrinología y Nutrición,. Clínica Universitaria, Facultad de Medicina, Universidad de Navarra.
authors.forename: M D
authors.initials: MD
authors.lastname: Lorente
authors.forename: C
authors.initials: C
authors.lastname: Marginet
authors.forename: P
authors.initials: P
authors.lastname: Pujante
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000175:diagnosis*