There is only one study that has measured the prevalence (total number of cases in a population) and incidence (annual number of new cases) of<unk> . This study was conducted in Northern Spain and used hospital records in a well-defined population. The study showed that 45.5 people out of 100,000 had been diagnosed with<unk> , with 4.2 new cases per year. 61% were due to tumors of the pituitary gland, 9% due to other types of lesions, and 19% due to other causes; in 11% no cause could be identified. Recent studies have shown that people with a previous traumatic brain injury, spontaneous subarachnoid hemorrhage (a type of stroke) or radiation therapy involving the head have a higher risk of<unk> . After traumatic brain injury, as much as a quarter have persistent pituitary hormone deficiencies. Many of these people may have subtle or non-specific symptoms that are not linked to pituitary problems but attributed to their previous condition. It is therefore possible that many cases of<unk>  remain undiagnosed, and that the annual incidence would rise to 31 per 100,000 annually if people from these risk groups were to be tested.
Hypopituitarism
Laron syndrome
Hyperpituitarism
Hyperprolactinemic SAHA syndrome
Late onset congenital adrenal hyperplasia
Congenital adrenal hyperplasia
Lipoid congenital adrenal hyperplasia
Hypergonadotropic hypergonadism