Surgery for chronic rhinosinusitis with nasal polyps: An update

The subsequent risk of retinal vein occlusion disease after sinusitis diagnosis: a nationwide population-based study

Retinal vein occlusion (RVO) is a common retinal vascular disease that causes visual impairment. However, there is limited evidence regarding the relationship between sinusitis and risk of RVO. This study investigated the association between sinusitis and the subsequent risk of RVO disease. A retrospective cohort study was conducted and patients with sinusitis or RVO were selected from the National Health Insurance Research Database (NHIRD) of Taiwan. In this population-based study, we identified a total of 131,532 sinusitis patients, who were matched with 263,064 non-sinusitis individuals based on sex and age. The Cox proportional hazard regression was applied to demonstrate the adjusted hazard ratio (aHR) with 95% confidence interval (CI) of main outcomes. Our results showed that the crude hazard ratio (cHR) for the risk of RVO was 1.35 (95% CI: 1.20-1.52) in the sinusitis cohort compared with the non-sinusitis cohort. After adjustment for demographics and comorbidities in the multivariable cox regression, the adjusted hazard ratio (aHR) was 1.28 (95% CI: 1.13-1.44). Moreover, statistically significant differences were observed in the 14-year cumulative incidence of RVO (p < 0.0001), central RVO (p = 0.0002), and branch RVO (p = 0.0004) between the sinusitis and non-sinusitis cohorts. In conclusion, our study revealed that patients with sinusitis were at higher risk of being diagnosed with RVO.

Comparison of Proliferating Cell Nuclear Antigen (PCNA) Expression among Nasal Polyp and Chronic Rhinosinusitis

BACKGROUND AND OBJECTIVE

Chronic rhinosinusitis is a common inflammatory disorder in sinonasal mucosa that could be developed with or without nasal polyps. Cellular proliferation is suggested as a possible mechanism of nasal polyp development. However, conducted studies in this context are limited. So, the present study's aim is the comparison of proliferating cell nuclear antigen (PCNA) expression in nasal polyps and chronic rhinosinusitis.

MATERIALS AND METHODS

In this cross-sectional study, 70 nasal polyp and 60 chronic rhinosinusitis samples from patients referred to Mostafa Khomeini Hospital, Tehran from 2017 to 2022 were immunohistochemically stained by PCNA marker. The percentage of PCNA nuclear expression was determined in two groups and its association with the type of pathological lesion and the patient's age and sex was analyzed by SPSS statistic software version 24 statistical software (IBM Statistics, USA).

RESULTS

The mean percentage expression of PCNA in nasal polyp and chronic rhinosinusitis samples was 16.55 ± 13.66 and 17.58 ± 12.68 respectively (ranging from 0 to 57 in both groups) however, there was no significant statistical difference between the two groups (p = 0.479). No relationship was found between PCNA expression with age and sex in none of the chronic rhinosinusitis and nasal polyp groups.

CONCLUSION

Proliferative activity of the nasal epithelial cell is similar in chronic rhinosinusitis with and without nasal polyps and it is considered that the increase of epithelial cell proliferative activity probably has no role in nasal polyp development in patients with chronic rhinosinusitis.