Head and neck hemangiopericytoma.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D005626:Frontal Sinus; D006257:Head; D006258:Head and Neck Neoplasms; D006390:Hemangioendothelioma; D006393:Hemangiopericytoma / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology / Q000473:pathology / Q000628:therapy; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007822:Laryngeal Neoplasms; D008048:Lip Neoplasms; D008297:Male; D008339:Mandibular Neoplasms; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D010157:Palatal Neoplasms; D010255:Paranasal Sinus Neoplasms; D012737:Sex Factors; D014062:Tongue Neoplasms