Juvenile Nasopharyngeal Angiofibroma: Difference between revisions

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=== Physical Examination ===
=== Physical Examination ===
Many patients will not have obvious findings on anterior rhinoscopy. A large vascular-appearing mass is commonly fond on nasal endoscopy on the posterior lateral nasal sidewall near the region of the sphenopalatine artery. Note that these hypervascular masses should not be biopsied, as this may result in significant bleeding that is hard to control in the clinic setting.
Many patients will not have obvious findings on anterior rhinoscopy. A large vascular-appearing mass is commonly fond on nasal endoscopy on the posterior lateral nasal sidewall near the region of the sphenopalatine artery. Note that '''these hypervascular masses should not be biopsied''', as this may result in significant bleeding that is hard to control in the clinic setting.


=== Laboratory Tests ===
=== Laboratory Tests ===

Revision as of 16:42, 17 November 2024


Overview

Juvenile nasopharyngeal angiofibroma (JNA) is a benign vascular neoplasm of the nasal cavity and nasopharynx that classically presents in adolescent boys.

Pathophysiology

Relevant Anatomy

JNA's typically originate in the region of the sphenopalatine artery (SPA) in the posterior nasal cavity/nasopharynx. From there, they can extend into the paranasal sinuses, pterygopalatine fossa (PPF), infratemporal fossa (ITF), orbit, or cranial vault.

  • Cadaveric model of the PPF

    Cadaveric model of the PPF

  • Neural contents of the PPF

    Neural contents of the PPF

  • Maxillary artery branches, with SPA at the distal end

    Maxillary artery branches, with SPA at the distal end

  • Location of the sphenopalatine foramen

    Location of the sphenopalatine foramen

  • Location of the ITF

    Location of the ITF

Disease Etiology

Epidemiology

Juvenile nasopharyngeal angiofibroma has been reported to be the most common benign neoplasm of the nasopharynx in young males. It accounts for 0.05% to 0.5% of all head and neck tumors, with a reported incidence of 1 in 5,000 to 1 in 60,000 in the US annually.[1][2][3] It classically presents in adolescent males, with an typical age of presentation between 13 and 22 years old.[4]

Genetics

There is no identified definitive genetic locus that predisposes patients to JNA's. However, there have been a number of studies looking at the various genetic components that could influence their formation.[5] Due to fact that JNA's classically form in adolescent males, there have been several studies focused on the possible hormonal influence on their formation and growth. JNA's tend to have an abundance of progesterone and estradiol, but a relatively lower concentration of testosterone and dihydrotestosterone.[6][7] Supplemental testosterone was trialed in JNA patients, but both tumor growth[8] and tumor recurrence[9] have been documented.

Histology

Diagnosis

Patient History

Patients may have a history of any of the following symptoms:

  • Unilateral nasal obstruction
  • Recurrent epistaxis
  • High-volume epistaxis
  • Eustachian tube dysfunction
  • Headache
  • Facial swelling
  • Anosmia / Hyposmia
  • Cranial neuropathy
  • Vision changes

Physical Examination

Many patients will not have obvious findings on anterior rhinoscopy. A large vascular-appearing mass is commonly fond on nasal endoscopy on the posterior lateral nasal sidewall near the region of the sphenopalatine artery. Note that these hypervascular masses should not be biopsied, as this may result in significant bleeding that is hard to control in the clinic setting.

Laboratory Tests

Laboratory tests are not commonly useful in the diagnosis of JNA's, but should be performed preoperatively in the case of a planned surgical resection.

  • Hemoglobin / Hematocrit
  • Platelet level
  • Platelet function (if family history of platelet dysfunction)
  • PT / INR
  • Blood Type and Screen (all patients)
  • Blood Type and Cross (patients with advanced stage tumors where a significant blood loss is expected)

Imaging

[Text about imaging choices]

There are several classification systems that have been proposed for JNAs based on imaging findings.

Classification Systems for Juvenile Nasopharyngeal Angiofibromas
Classification System Stage I Stage II Stage III Stage IV Stage V
Andrews (1989)[10] Confined to NP Invading one of the following with evidence of bony erosion: PPF, MS, ES, or SS Invading ITF or orbit

IIIa: No intracranial extension
IIIb: Extradural (parasellar) extension		 Intradural extension

IVa: No infiltration of CS, PF, or OC
IVb: Infiltration of CS, PF, or OC		 --
Chandler (1984)[11] Confined to NP Extension into the nasal cavity, SS, or both Extension into any of the following: antrum, ES, PMF, ITF, orbit, or cheek Intracranial extension --
Onerci (2006)[12] Nose, NP, ES, and SS or minimal extension into PMF MS involvement, full occupation of PMF, extension to anterior cranial fossa, limited extension into ITF Deep extension into cancellous bone at pterygoid base or body and GW of sphenoid, significant lateral extension into ITF or pterygoid plates, orbital involvement, CS obliteration Intracranial extension between pituitary gland and ICA, tumor localization lateral to ICA, middle fossa extension and extensive intracranial extension --
Radkowski (1996)[13] IA: Confined to nose or NP
IB: Extends into one or more sinuses		 IIa: Minimal extension into medial PMF
IIb: Full occupation of PMF with local mass effect
IIc: Extension into ITF, cheek, or posterior to pterygoid plates		 Erosion of skull base

IIIa: Minimal skull base involvement
IIIb: Extensive intracranial extension, with or without invasion into CS		 -- --
Sessions (1981)[14] IA: Confined to nose or NP
IB: Extends into one or more sinuses		 IIa: Minimal extension into PMF
IIb: Full occupation of PMF with or without orbital erosion
IIc: ITF with or without cheek extension		 Intracranial extension -- --
UPMC (2010)[15] Nasal cavity, medial PPF Paranasal sinuses, lateral PPF; no residual vascularity Skull base erosion, orbit, ITF involvement; no residual vascularity Skull base erosion, orbit, ITF involvement; residual vascularity Intracranial extension with residual vascularity

M: Medial extension
L: Lateral extension
Abbreviations: Cavernous sinus (CS), Ethmoid sinus (ES), Infratemporal fossa (ITF), Internal carotid artery (ICA), Maxillary sinus (MS), Nasopharynx (NP), Optic chiasm (OC), Pituitary fossa (PF), Pterygomaxillary fissure (PMF), Pterygopalatine fossa (PPF), Sphenoid sinus (SS)

Differential Diagnosis

Management

Medical Management

Surgical Management

Outcomes

Complications

Prognosis

References

  1. ↑ Boghani Z, Husain Q, Kanumuri VV, Khan MN, Sangvhi S, Liu JK, Eloy JA. Juvenile nasopharyngeal angiofibroma: a systematic review and comparison of endoscopic, endoscopic‐assisted, and open resection in 1047 cases. The Laryngoscope. 2013 Apr;123(4):859-69.
  2. ↑ Ferouz AS, Mohr RM, Paul P. Juvenile nasopharyngeal angiofibroma and familial adenomatous polyposis: an association?. Otolaryngology—Head and Neck Surgery. 1995 Oct;113(4):435-9.
  3. ↑ Huang Y, Liu Z, Wang J, Sun X, Yang L, Wang D. Surgical management of juvenile nasopharyngeal angiofibroma: analysis of 162 cases from 1995 to 2012. The Laryngoscope. 2014 Aug;124(8):1942-6.
  4. ↑ Newman M, Nguyen TB, McHugh T, Reddy K, Sommer DD. Early-onset juvenile nasopharyngeal angiofibroma (JNA): a systematic review. Journal of Otolaryngology-Head & Neck Surgery. 2023 Dec;52(1):s40463-023.
  5. ↑ Doody J, Adil EA, Trenor III CC, Cunningham MJ. The genetic and molecular determinants of juvenile nasopharyngeal angiofibroma: a systematic review. Annals of Otology, Rhinology & Laryngology. 2019 Nov;128(11):1061-72.
  6. ↑ Kumagami H. Estradiol, dihydrotestosterone, and testosterone in juvenile nasopharyngeal angiofibroma tissue. American Journal of Rhinology. 1993 May;7(3):101-4.
  7. ↑ Kumagami H. Sex hormones in juvenile nasopharyngeal angiofibroma tissue. Auris Nasus Larynx. 1993 Jan 1;20(2):131-5.
  8. ↑ Johnsen S, Kloster JH, Schiff M. The action of hormones on juvenile nasopharyngeal angiofibroma. Acta Oto-Laryngologica. 1966 Jan 1;61(1-6):153-60.
  9. ↑ Riggs S, Orlandi RR. Juvenile nasopharyngeal angiofibroma recurrence associated with exogenous testosterone therapy. Head & Neck: Journal for the Sciences and Specialties of the Head and Neck. 2010 Jun;32(6):812-5.
  10. ↑ Andrews JC, Fisch U, Aeppli U, Valavanis A, Makek MS. The surgical management of extensive nasopharyngeal angiofibromas with the infratemporal fossa approach. The Laryngoscope. 1989 Apr;99(4):429-37.
  11. ↑ Chandler JR, Moskowitz L, Goulding R, Quencer RM. Nasopharyngeal angiofibromas: staging and management. Annals of Otology, Rhinology & Laryngology. 1984 Jul;93(4):322-9.
  12. ↑ Onerci M, Oğretmenoğlu O, Yücel T. Juvenile nasopharyngeal angiofibroma: a revised staging system. Rhinology. 2006 Mar 1;44(1):39-45.
  13. ↑ Radkowski D, McGill T, Healy GB, Ohlms L, Jones DT. Angiofibroma: changes in staging and treatment. Archives of Otolaryngology–Head & Neck Surgery. 1996 Feb 1;122(2):122-9.
  14. ↑ Sessions RB, Bryan RN, Naclerio RM, Alford BR. Radiographic staging of juvenile angiofibroma. Head & neck surgery. 1981 Mar;3(4):279-83.
  15. ↑ Snyderman CH, Pant H, Carrau RL, Gardner P. A new endoscopic staging system for angiofibromas. Archives of Otolaryngology–Head & Neck Surgery. 2010 Jun 21;136(6):588-94.
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