THU523 A Rare Case Of Functional Cervical Paraganglioma: Case Report

Disclosure: V.D. Oliveira: None. G.C. Vaccarezza: None. A.E. Vieira: None. N.M. Scalissi: None. A.R. dos Santos: None. P.R. Lazarini: None. A.B. Suehara: None. C. Olivati: None. J.V. Lima: None. INTRODUCTION: Head and neck paragangliomas (HNPGL) are rare tumors arising from cells associated with parasympathetic ganglia. Catecholamine hypersecretion is founded in less than 5% of the patients. Evidence is growing that about 50% of the HNPGL are associated with hereditary syndromes. CASE REPORT: Male patient, 34 years old, previously healthy, presented with a 1-year history of jaw pain and hypoacusis, associated with progressive symptoms of dysphagia, facial paralysis, dysphonia and hoarseness. He also had a 2-month history of hypertension and palpitations. On physical examination, the patient had deficits in cranial nerves (CN) VII, VIII, IX, X, XI and XII and blood pressure of 150x90mmHg. Head and neck MRI showed an expansive lesion occupying the right jugular foramen extending above the cistern at the cerebellopontine angle and below the carotid space in the ipsilateral infratemporal fossa, reaching 50% of the internal carotid artery and extending into the right internal auditory canal, suggestive of glomus jugulare paraganglioma. Laboratory examination showed normetanephrines 9.1 mmol/L (VR < 0.9), confirming catecholamine-secreting paraganglioma. Next Generation Sequence (NGS) genetic testing evaluating 24 genes (ATM, DLST, EGLN1, EGLN2, FH, EPAS1 (HIF2A), HRAS, KIF1B , MAX, MDH2, MEN1 , MERTK , MET, NF1, RET, SLC25A11, SDHA, SDHAF2, SDHB, SDHC, SDHD, TMEM127, TP53 and VHL) was positive for the pathogenic variant c.166_170del:p.(Pro56Tyfs*5) of the SHDB gene. Patient with no family history of paraganglioma. Alpha-adrenergic blockade was started with doxazosin and, after two weeks, beta-adrenergic blockade with propranolol. After 3 months, he underwent preoperative embolization 48 hours before surgery with total tumor resection. Patient did not require antihypertensive drugs after surgery. CONCLUSIONS: We reported a case of a young patient diagnosed with catecholamine secreting HNPGL that carries pathogenic variant of SHDB. Presentation: Thursday, June 15, 2023