of the latter 10 had morphologically verified benign tumors , 5 -- mixed type tumors , and 4 -- malignant tumors ( sarcoma in 2 patients , a thyroid cancer metastasis to the parapharyngeal lymph nodes in 1 , malignant chemodectoma in 1 ) .
C0006826
malignant tumors
C1261473
sarcoma