CT
Large irregular soft tissue mass lesion is seen centered upon the right nasal cavity. The mass appears of homogeneous high density at the non contrast series, with faint non homogeneous contrast enhancement at the post contrast series. It show the following extensions:
- Anteriorly, it extends via the right nasal nare anteriorly
- Laterally, it extends within the right maxillary antrum with bone thinning and pressure erosion of the lateral wall with small extra-sinus extension
- Medially, it causes erosion of the nasal septum and extend into the left nasal cavity
- Posteriorly, it extends posteriorly reaching the posterior choana and nasophayrnx.
- Superiorly, it erodes the floor of both ethmoidal complexes, extending into both ethmoid air cells with bony erosions of their bony septae. It also erodes the right nasal process of maxillary bone showing small right intra-orbital extension along the infero-medial floor of the orbit. Right proptosis is noted
- No intra-cranial extension noted.
3D reconstruction showed widening of the right nasal cavity and pressure bony erosion of the right nasal bone and nasal process of right maxillary bone.
3D surface rendering reconstruction images shows right nasal enlargement and right proptosis.
Frontal and sphenoid sinusitis.