Corticosteroids Replacement in a Patient With Panhypopituitarism and COVID-19 Infection

Background: Hypopituitarism refers to complete or partial insufficiency of pituitary hormone secretion and patients require lifelong hormone replacement. Those with ACTH deficiency rely on exogenous glucocorticoids and at times of intercurrent illness require stress doses to prevent an adrenal crisis. The benefits and adverse effects of corticosteroids for treatment of COVID-19 pneumonia are currently under investigation. We report our experience in a patient with COVID-19 pneumonia who received high dose corticosteroids for panhypopituitarism. Clinical Case: A 51-year-old man presented with one-week history of fever and generalized weakness. He had been diagnosed with a non-functional pituitary macro-adenoma causing panhypopituitarism 1 year ago when he developed generalized tonic-clonic seizures. He underwent trans-sphenoidal resection of the pituitary adenoma. However, he then discontinued his hormonal therapy and was lost to follow up. He had postural hypotension but was not tachypneic or hypoxemic. He tested positive for COVID-19 and chest x-ray showed prominent bilateral broncho-vascular markings; he was hospitalized as mild COVID-19 pneumonia. Laboratory investigations revealed secondary adrenal insufficiency, secondary hypothyroidism and hypogonadotropic hypogonadism. MRI of the pituitary now showed persistence of the pituitary macroadenoma, measuring 3.5 x 3.7 x 2.4 cm in dimensions, causing sellar obliteration and left cavernous sinus invasion. Treatment with stress dose steroids, Hydrocortisone 50 mg 4 times daily was initiated, followed by thyroid hormone replacement with Levothyroxine 125 mcg daily. He also received antivirals and supportive care for COVID-19, guided by local hospital protocol. After significant clinical improvement, steroids were tapered down and he was discharged on a maintenance dose of 20 mg hydrocortisone per day in divided doses. The patient was stable at outpatient follow up after one month. He was started on testosterone replacement for erectile dysfunction due to hypogonadotropic hypogonadism. He was offered surgery for complete resection of the residual pituitary adenoma, but he declined and preferred to continue medical therapy. Conclusion: Hypopituitarism is associated with significant morbidity and premature mortality, a key risk factor being cortisol deficiency. Adrenal crisis is a life-threatening medical emergency and remains an important cause of death in patients with adrenal insufficiency. These patients are also vulnerable to develop severe complications from COVID-19 infection due to the absence of normal cortisol responses to stress. Despite receiving stress dose corticosteroids, this high-risk patient recovered from COVID-19 pneumonia without complications. These findings support the use of corticosteroids when necessary for treatment of coexisting conditions in patients with COVID-19.