Mixed corticotropic and somatotropic pituitary adenoma: A case report

Abstract

Multi-secreting pituitary adenomas are relatively rare. The mixed somatotropic and corticotropic pituitary adenoma is very rare. The most widely described association is that coupling hypersecretion of GH and prolactin. We report the case of a patient with a pituitary adenoma bi-secreting GH and ACTH. He was a 28-year-old patient admitted for pituitary tumor syndrome, cushing syndrome. The hormonal assessment found a dependent ACTH cushing syndrome. The other hypothalamohypophysial axes were without abnormality. The hypothesis of a pituitary adenoma was raised. The brain scan confirmed the diagnosis by showing a macroadenoma with supra-sellar development with infiltration of the cavernous sinus. After trans-sphenoidal surgery, there was a complete regression ofcushing syndrome. The pathology examination showed a pituitary adenoma; at immunohistochemistry cells expressing anti-ACTH and anti - GH antibodies with KI 67 at 1%.