Juvenile Nasopharyngeal Angiofibroma (JNA) is a rare, benign, but locally aggressive and highly vascular neoplasm. It accounts for approximately 0.05% to 0.5% of all head and neck tumors. JNA occurs almost exclusively in prepubescent and adolescent males, with a mean age of presentation around 17 years.

Pathogenesis and Origin 

While the exact embryological etiology remains debated, some theories suggest it arises from the incomplete regression of the first branchial arch artery, representing a vascular malformation rather than a true neoplasm. The tumor characteristically originates from the lateral basisphenoid, near the sphenopalatine foramen, at the trifurcation of the palatine bone, the horizontal ala of the vomer, and the pterygoid process root. From this epicenter, it spreads along paths of least resistance through natural fissures and foramina. It can expand medially into the nasopharynx and nasal cavity, laterally through the pterygomaxillary fissure into the infratemporal fossa, and superiorly into the orbit or intracranial cavity. A classic radiographic hallmark of its lateral extension into the pterygomaxillary fissure is the "Holman-Miller sign," which is the anterior bowing of the posterior wall of the maxillary sinus.

Clinical Presentation and Diagnosis 

Patients typically present with a classic triad of painless unilateral nasal obstruction, recurrent profuse epistaxis, and a nasopharyngeal mass. As the tumor enlarges, it can cause facial swelling, proptosis, diplopia, and conductive hearing loss due to eustachian tube obstruction. On endoscopy, JNA appears as a smooth, firm, purple-reddish mass.

Crucially, an in-office biopsy is absolutely contraindicated 

due to the tumor's extreme vascularity and the risk of life-threatening hemorrhage. Diagnosis relies instead on clinical presentation and characteristic imaging. Computed tomography (CT) delineates bony erosion, widening of foramina, and the Holman-Miller sign. Magnetic resonance imaging (MRI) is essential to assess soft tissue and intracranial extension, classically demonstrating heterogeneous enhancement with "flow voids" indicating high-flow vessels, which gives the tumor a distinct "salt and pepper" appearance. Digital subtraction angiography is a critical diagnostic and therapeutic tool used to map the arterial supply—which predominantly comes from the internal maxillary artery—and prepare for surgery.

Treatment 

The primary treatment for JNA is complete surgical resection. Preoperative embolization of the feeding vessels 24 to 48 hours before surgery is highly recommended to significantly reduce intraoperative blood loss and improve surgical visualization. Historically, open surgical techniques such as midfacial degloving and lateral rhinotomy were utilized. However, the Endoscopic Endonasal Approach (EEA) has become the gold standard, offering the advantages of reduced morbidity, avoidance of facial incisions, and comparable or lower recurrence rates.

Follow-up and Recurrence 

JNAs have a notable tendency to recur, typically within 6 to 36 months postoperatively. Recurrence is often attributed to microscopic residual disease in the cancellous bone of the basisphenoid, making extensive drilling of this area a crucial surgical step to prevent relapse. Patients require close, long-term clinical and radiological follow-up—usually with periodic MRIs—for at least 3 to 5 years. In cases where the tumor is unresectable or recurs in critical anatomical areas, radiation therapy or stereotactic radiosurgery may be employed as an effective salvage treatment.

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Author

Asst.Prof.Wirach Chitsuthipakorn

Board Otolaryngology, 2009 

Certificate of Medical Proficiency in Rhinology and Allergy, 2022

Research profiles: Google Scholar; ResearchGate

First published: 14 June 2026 

Last reviewed and updated: 14 June 2026