Herein, we report a case of retropharyngeal hemorrhage. A 48-year-old woman was referred to our hospital with sore throat. At first, retropharyngeal abscess was suspected, and the patient was referred to our department. Treatment with antibiotics was ineffective. MRI was performed, which suggested retropharyngeal hemorrhage caused by a parathyroid. We drained the hematoma and performed parathyroidectomy. Histological examination of the resected specimen showed the hemorrhage from parathyroid cyst. Hemorrhage from a parathyroid cyst is rare and there have been no reports of cases diagnosed before surgery. In cases of sore throat, careful diagnosis and prompt treatment are needed. Parathyroid can be a origin of retropharyngeal hemorrhage. Moreover, cases of hemorrhage from a parathyroid cyst should be treated taking into consideration the functional status of the cyst.
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