6622 Severe Primary Hypothyroidism in a Child Presented as a Pituitary Tumour; a case Report

Abstract Disclosure: S.S. Awadalla: None. A 9-year-old patient showed up to the emergency department due to a headache that had been going on for a month without other symptoms and no neurological alterations. Complete blood count and glycemia were normal. A Cerebral MRI was requested and showed a pituitary adenoma. The patient was initially evaluated by neurosurgeons and referred to a pediatric endocrinologist. TSH, free T4, IGFI, and cortisol were evaluated, TSH was found to be high at 936 (normal, 0.4-4.2), free T4 < 0.4; suggestive of severe primary hypothyroidism. The case was analysed with the neurosurgery department, and a joint decision to start therapy with LT4 was taken, whilst monitoring the evolution of the pituitary adenoma. TSH and Free T4 were normal, and the MRI of Sella Turcica three months later showed complete pituitary normality. The presentation of this case is of relevance as the primary modality of treatment is thyroid hormone supply and not surgery. Interprofessional team integration is recommended for the treatment of patients with this condition. Presentation: 6/1/2024