Page 67 - Revista Portuguesa - SPORL - Vol 62. Nº1

Figure 2
Sequence of Coronal computed tomography scan in a patient with a right polypoid mass with a
complete homolateral opacification of maxillary and ethmoidal sinus which corresponded to an inverted
papilloma. (B) Note the area of bony erosion on the middle maxillary sinus wall (white asterisks) due to
mass expansion arising from the left metatal region and extending toward the homolateral nasal cavity.

T1-weighted MRI sequences without contrast in Stage I of the disease, 28% in Stage II, 25%
and T2-weighted MRI sequences with contrast in Stage III and 16% in Stage IV. Staging made
revealed the presence of images with signs of it possible for us to determine the degree of
hypo- and hyperintensity in the interior of the limited disease or extended disease in the nasal
neoplasms, known as "contoured cerebriform sinus cavities. All patients underwent surgery,
pattern". The MRI images also indicated that in and their lesions were resected endoscopically.
16% of these cases, there were noticeable signs Intraoperatively, the insertion site of the SPs
of neoplastic progression and extra-nasosinusal was identified in different anatomical areas,
extension. The correlative comparison of the CT with a predictive coincidence of 67% with
scan and MRI of this group of patients showed respect to the finding of focal hyperostosis
consistency with the presence of advanced confirmed in the preoperative CT scans.
disease. (Figure 3) The endoscopic and imaging Histopathologic findings reported were 67%
findings observed allowed us to assess the IPs, 30% FPs and 3% OPs. Associated histologic
location, size, and extension of the neoplasms malignancy (squamous cell carcinoma)
for their corresponding staging, using the related to recurrent IPs was reported in
scale proposed by Krouse . According to this 3% of patients. The incidence of recurrent
1
scale, 31% of the patients studied were placed disease was observed in 33% of the group.

Volume 62 . Nº1 . Março 2024 67