Nonhypertensive male with multiple paragangliomas of the heart and neck: A case report

Table 1 Timeline

Timeline of the patient
Initial presentation	Presented with the chief complaint of recently recurrent chest pain
Day 1	Echocardiography revealed an intracardiac mass in the right atrioventricular groove, wrapped around the proximal segment of the right coronary artery
Day 2	Coronary artery computed tomography showed that abnormal blood vessels were presented between the right atrium and right ventricle
Day 5	Coronary angiography showed that there were abundant blood vessels that were wrapped around and supplied the intracardiac mass in the right atrioventricular groove
Day 6	Positron emission tomography/computed tomography suggested that the intracardiac mass was a malignant tumor
Day 8	The level of normetanephrine in the blood was obviously increased
Day 18	Open heart surgery was performed, and the intracardiac mass was completely excised. Quick freezing pathology indicated that the intracardiac mass was a mesenchymal malignant tumor
Day 25	The final pathology results demonstrated that the intracardiac mass was a cardiac paraganglioma
Day 26	The combination of pathological and immunohistochemistry results demonstrated bilateral carotid masses, these bilateral carotid masses were also paragangliomas
Day 27	Discharged from hospital
Day 83	At the 3-mo follow-up, the patient did not have recurrent chest pain

Table 2 Laboratory data of this patient on arrival to our hospital

Laboratory examinations
Variable	Reference range	Results (this hospital on arrival)
White cell count, × 109/L	3.5-9.5	13.54
Hemoglobin, g/L	130-175	114
Platelet count, × 109/L	125-350	196
Hematocrit, %	40-50	34.7
Urea nitrogen, mmol/L	2.9-8.2	6.5
Creatinine, μmol/L	44-115	100
Glucose, mmol/L	3.9-5.6	5.6
Sodium, mmol/L	137-147	141
Potassium, mmol/L	3.5-5.3	3.9
Chloride, mmol/L	99-110	103
Phosphorus, mmol/L	0.9-1.34	0.93
Calcium, mmol/L	2.15-2.55	2.35
Protein, g/L
Total	65-85	68
Albumin	35-55	43
Globulin	20-40	25
Cardiac troponin, ng/mL	< 0.03	0.011
NT-proBNP, pg/mL	0-100	52.9
MM subtype of creatine kinase, U/L	24-174	186
Creatine kinase, U/L	34-174	200
FT3, pmol/L	3.1-6.8	4.5
FT4, pmol/L	12-22	15.3
TSH, μIU/mL	0.27-4.2	3.65
Prothrombin time	10-13	10.8
International normalized ratio	0.5-1.2	0.99
Partial thromboplastin time	25-31.3	27.6

FT3: Free triiodothyronine; FT4: Free thyroxine; NT-proBNP: N-terminal prohormone of brain natriuretic peptide; TSH: Thyroid-stimulating hormone.