Can Computed Tomography Findings Predict the Recurrence of Sinonasal Inverted Papilloma?

Computed Tomography Imaging Patterns of Sinonasal Inverted Papillomas: Comparison of Primary and Recurrent Disease

OBJECTIVE

To analyze clinical and radiographic features that may impact the rate of focal hyperostosis (FH) on computed tomography (CT) for primary and recurrent sinonasal inverted papillomas (IPs) as well as highlight factors that may affect concordance between FH and IP true attachment point (TAP).

METHODS

All IPs resected between 2006 and 2022 were retrospectively reviewed. CTs were read by a neuroradiologist blinded to operative details. IP with malignancy was excluded. Operative reports and long-term follow-up data were evaluated.

RESULTS

Of 92 IPs, 60.1% had FH, 25% had no CT bony changes, and 20.7% were revision cases. The recurrence rate for rhinologists was 10.5% overall and 7.3% for primary IPs. Primary and revision IPs had a similar rate of FH (63% vs. 52.6%; p = 0.646) and FH-TAP agreement (71.7% vs. 90%; p = 0.664). Nasal cavity IPs, especially with septal attachment, were more likely to lack bony changes on CT (57.1%) compared to other subsites (p = 0.018). Recurrent tumors were 16 mm larger on average (55 mm vs. 39 mm; p = 0.008). FH (75.0% vs. 60.9%; p = 0.295), FH-TAP concordance (91.7% vs. 74.4%; p = 0.094), and secondary IP (18.8% vs. 20.3%; p = 0.889) rates were similar between recurrent and nonrecurrent tumors.

CONCLUSION

Primary and revision IPs have a similar rate of FH and FH-TAP agreement. Nasal cavity IPs are less likely to exhibit bony CT changes. Lower recurrence was associated with smaller size and fellowship training but not multiple TAPs, revision, FH absence, or FH-TAP discordance.

LEVEL OF EVIDENCE

3 Laryngoscope, 134:1591-1596, 2024.

Classification of nasal polyps and inverted papillomas using CT-based radiomics

OBJECTIVES

Nasal polyp (NP) and inverted papilloma (IP) are two common types of nasal masses. And their differentiation is essential for determining optimal surgical strategies and predicting outcomes. Thus, we aimed to develop several radiomic models to differentiate them based on computed tomography (CT)-extracted radiomic features.

METHODS

A total of 296 patients with nasal polyps or papillomas were enrolled in our study. Radiomics features were extracted from non-contrast CT images. For feature selection, three methods including Boruta, random forest, and correlation coefficient were used. We choose three models, namely SVM, naive Bayes, and XGBoost, to perform binary classification on the selected features. And the data was validated with tenfold cross-validation. Then, the performance was assessed by receiver operator characteristic (ROC) curve and related parameters.

RESULTS

In this study, the performance ability of the models was in the following order: XGBoost > SVM > Naive Bayes. And the XGBoost model showed excellent AUC performance at 0.922, 0.9078, 0.9184, and 0.9141 under four conditions (no feature selection, Boruta, random forest, and correlation coefficient).

CONCLUSIONS

We demonstrated that CT-based radiomics plays a crucial role in distinguishing IP from NP. It can provide added diagnostic value by distinguishing benign nasal lesions and reducing the need for invasive diagnostic procedures and may play a vital role in guiding personalized treatment strategies and developing optimal therapies.

CRITICAL RELEVANCE STATEMENT

Based on the extraction of radiomic features of tumor regions from non-contrast CT, optimized by radiomics to achieve non-invasive classification of IP and NP which provide support for respective therapy of IP and NP.

KEY POINTS

• CT images are commonly used to diagnose IP and NP. • Radiomics excels in feature extraction and analysis. • CT-based radiomics can be applied to distinguish IP from NP. • Use multiple feature selection methods and classifier models. • Derived from real clinical cases with abundant data.

Surgical treatment of sinonasal inverted papilloma

PURPOSE OF REVIEW

To highlight how surgery of inverted papilloma has developed during the past year. Moreover, to give our own opinion on the state of research regarding inverted papilloma surgical management.

RECENT FINDINGS

Recent studies covering surgical treatment of inverted papilloma concentrated on the optimum surgical management aiming at complete resection, least morbidity and best outcome, with special interest regarding the maxillary and frontal sinuses. In maxillary sinus inverted papilloma, to avoid empty nose and/or epiphora, recent articles exerted all attempts to preserve the integrity of both the inferior turbinate and nasolacrimal duct, yet offer best exposure of all maxillary sinus walls specially the anterior and inferior ones. These included the new modifications of the prelacrimal and Denker approaches and lateral nasal wall transposition. In frontal sinus inverted papilloma, to avoid an external approach and insure postoperative patency of frontal sinus ostium, the periorbital suspension was introduced and orbital transposition approach was comprehensively utilized especially in far lateral located lesions and/or in supraorbital recess involvement. Associated malignancy is an important issue to identify as management plans significantly differ. Recurrence occurs early within the first 2 years but long-term follow-up is mandatory.

SUMMARY

Surgical procedures of sinonasal inverted papilloma are planned according to origin rather than the tumor extent. Origin targeted surgery and proper management of the site of attachment are the key to achieve complete surgical resection of sinonasal inverted papilloma. Recent trends advise the least destructive surgical techniques that offer best exposure, complete excision SNIP and least recurrence.