Eustachian tube involvement in a patient with relapsing polychondritis detected by magnetic resonance imaging: A case report

Table 1 Summary of the clinical course of the patient

Time point	Remarks
July 24, 2021	Redness of the bilateral auricles
July 27, 2021	Antibiotics administration at a clinician
August 10, 2021	Referred to our hospital
August 18, 2021	Non contrast enhanced chest to abdominal CT without significant findings
August 20, 2021	Biopsy for auricular cartilage
August 21, 2021	Contrast enhanced head and neck MRI with presenting figures
	Prednisolone administration was started
September 1, 2021	Symptoms and laboratory abnormality improved remarkably
October 28, 2021	Disappeared edema and contrast enhancement of eustachian tubes on MRI