Cerebrospinal fluid rhinorrhea as a complication of ACTH-secreting pituitary macroadenoma in a patient with morbid obesity

Cushing's disease (CD) is a progressive neuroendocrine disease caused by a pituitary tumor producing excessive amounts of ACTH. In most cases (80-85%) the cause of the disease is a pituitary corticotroph microadenomas (located within the sella, measuring 3–10 mm, rarely multiple microadenomas) and only 15% of cases are presented as corticotroph hyperplasia or pituitary macroadenoma extending beyond the sella. The macroadenomas in CD usually extend suprasellar (10%), infrasellar tumor growth is relatively rare (5%). If the clinical picture is subtle, the symptoms are caused by the development "mass effect" of the tumor as it propagates to the surrounding pituitary structures. Suprasellar growth leads to compression of the optic chiasm with narrowing of visual fields, infrasellar growth destructs the bottom of the sella turcica and may cause nasal cerebrospinal fluid leak, which is dangerous due depressurization of the cranial cavity and its communication with environmental pathogens, development of life-threatening conditions such as meningitis, meningoencephalitis, ventriculitis. Leading life-threatening complications of the CD are infectious and cardiovascular. But in the case of nasal liquorrhea with expansion of the tumor in sphenoid sinus with destruction of the bottom of the sella, there is an immediate threat to the life of the patient. This article presents an example of a patient with morbid obesity and lack of specific clinical manifestations of CD, in whom the diagnosis of disease CD was made on the results of laboratory and instrumental examination, which experienced a spontaneous nasal cerebrospinal fluid leak