Pituitary blastoma is a malignant neoplasm of the pituitary gland that was recognized by the World Health Organization in 2017. It is commonly diagnosed in children before 24 months of age. Here, we report the first case of a young adult patient who was diagnosed with pituitary blastoma with increased level of growth hormone instead of adrenocorticotropic hormone and provide a review of the literature.
A 19-year-old woman presented to our hospital with visual disturbance. She had a medical history of Wilms’ tumor and multinodular goiter. The brain imaging showed a 3.2 x 2.5 x 1.8 cm solid sellar and suprasellar cystic mass that upwardly displaced the optic chiasm. She had an elevated level of growth hormone but a normal level of adrenocorticotropic hormone, cortisol, and prolactin. The mass was subtotally removed through the left pterional craniotomy. The pathological exam suggested a pituitary blastoma. Thereafter, the patient was treated with chemotherapy and radiotherapy. At 4-year follow-up postsurgery, her overall well-being is good.
Although in this case the patient was a young adult, pituitary blastoma should be taken into consideration when children have an enhanced sellar and suprasellar mass with peripherally located cysts.

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