THU016 Hiding In Plain Sight: Florid Cushing’s Disease Presenting As A Severe Extremity Cellulitis

Disclosure: C.M. Godar: None. E.B. Noble: None. N.O. Vietor: None. T.S. Knee: None. Background: Cushing’s syndrome may rarely present as an emergency known as Florid Cushing’s Syndrome. Patients can exhibit severe hyperglycemia, hypertension, hypokalemia, infections, and hypercoagulability. Cushing’s syndrome is a rare disease, and the constellation of clinical features can be overlooked if clinicians are not aware of the manifestations of hypercortisolism. We present the case of a patient with Cushing’s syndrome that went unrecognized with life-threatening sequelae. Case presentation: A 52-year-old woman with well-controlled type 2 diabetes and hypertension was admitted to the hospital for severe left lower extremity cellulitis. Prior to hospitalization she had noted rapid weight gain, fatigue, weakness, mental clouding, and moodiness. She was admitted for antibiotics and surgical debridement. The infection persisted despite broad spectrum antibiotics, multiple surgical debridements, and skin grafting. She became bacteremic, and extremity amputation was considered. She additionally developed hypertensive emergency, refractory hypokalemia, and hyperglycemia to 396 mg/dL. Exam was notable for facial plethora, supraclavicular fullness, dorsocervical fat pad, and violaceous abdominal striae. Cushing’s Syndrome was suspected, and labs revealed a significantly elevated random serum cortisol of 60.5mcg/dL (Ref 6.2-19.4), significantly elevated 24H urine cortisol of 2157mcg/24H (Ref 0-50), and ACTH elevated to 81.8pg/mL (Ref 7.2-63.3) that confirmed Cushing’s Disease. MRI sella and octreotide scans did not localize a lesion. Inpatient therapy included multiple antihypertensive agents, insulin drip, aggressive potassium repletion, and initiation of ketoconazole to reduce cortisol levels. Ketoconazole was maximally dosed and she underwent surgical exploration and removal of a small pituitary microadenoma. Following surgery, she developed transient adrenal insufficiency requiring hydrocortisone and she no longer required antihypertensives, insulin, or potassium therapy. Follow up 7 years later has revealed no recurrence of Cushing’s Disease. Discussion: Cushing’s Syndrome may present with a variety of clinical features and rarely may present as a medical emergency. Delay in diagnosis can lead to Florid Cushing’s Syndrome which carries high risk for morbidity and mortality. This case illustrates the need for clinician awareness of the features of Cushing’s Syndrome: hypertension, hyperglycemia, rapid weight gain, cushingoid exam features, hypokalemia, hirsutism, virilization, infection, and/or hypercoagulable state. Severe hypercortisolism was responsible for this patient’s refractory infection, and if not controlled, she likely would have endured a lower extremity amputation. Rapid detection with elevated random serum and/or urine cortisol and treatment with a cortisol-lowering agent is critical and lifesaving. Presentation: Thursday, June 15, 2023