Frog face deformity of nose caused by

EXTENSIONS OF NASOPHARYNGEAL FIBROMA Nasopharyngeal fibroma is a benign tumour but locally invasive and destroys the adjoining structures. It may extend into: 1. Nasal cavity causing nasal obstruction, epistaxis and nasal discharge. 2. Paranasal sinuses. Maxillary, sphenoid and ethmoid sinuses can all be invaded. 3. Pterygomaxillary fossa, infratemporal fossa and cheek. 4. Orbits giving rise to proptosis and "frog-face deformity." It enters through the inferior orbital fissure and also destroys apex of the orbit. It can also enter the orbit through superior orbital fissure. 5. Cranial cavity. It can extend into: (a) Anterior cranial fossa through roof of ethmoids or cribriform plate. (b) Middle cranial fossa through erosion of floor of middle cranial fossa or indirectly by invading the sphenoid sinus and sella turcica. In the former case, tumour lies lateral to internal carotid aery and in the latter case medial to the aery. Ref:- Dhingra; pg num:-246