Polycythemia Patients with this<unk>  usually have early onset of secondary polycythemia, most of them at birth. They are diagnosed with typical physical characteristics (red cheeks, flushing, swelling of the extremities), which are then confirmed through lab results that show abnormally increased erythropoietin levels. Tumors Patients are initially suspicious for paragangliomas when they present with symptoms like hypertension, heart palpitations, headaches, and anxiety; somatostatinomas usually induce diabetes and cholecystitis. From these symptoms, patients undergo biochemical testing from blood and urine samples as well as functional and anatomical imaging to confirm tumor presence. Other findings Some patients with this<unk>  have also been found to have ocular abnormalities, including bilateral fibrosis upon the optic disc and dilated capillaries.
Pacak–Zhuang syndrome
Brugada syndrome
Lown–Ganong–Levine syndrome
Bhaskar–Jagannathan syndrome
Burnside–Butler syndrome
Raine syndrome
Bowen–Conradi syndrome
Woodhouse–Sakati syndrome