Recurrent respiratory papillomatosis with lower airway involvement in a young woman

Diagnostic techniques in HPV infections and the need to implement them in plantar lesions: A systematic review

INTRODUCTION

Human papillomavirus has been reported as the etiological cause of most cervical cancers and other potentially malignant lesions. It also affects other areas, producing benign tumors on the skin. Plantar warts are a common problem found in clinical practice and share signs and symptoms with other dermatological conditions. Diagnosis of HPV infection remains a hot topic in research.

METHOD

The present work systematically reviews the literature on the diagnostic techniques available in the clinical setting for any type of lesion produced by the virus and compares the techniques identified to those found in use for foot lesions.

RESULTS

Results showed a variety of diagnostic methods, including molecular techniques, which exhibit more sensitivity than other methods but are less frequently applied to plantar lesions, where visual inspection is the most frequent method but can lead to errors.

CONCLUSION

The techniques identified need to be applied to plantar lesions to improve differential diagnosis in clinical practice.

EXPERT OPINION

Research will continue to grow and a proper diagnostic technique for plantar lesions will be available in the near future.

An Experimental Model of Human Recurrent Respiratory Papillomatosis: A Bridge to Clinical Insights

OBJECTIVES/HYPOTHESIS

To investigate the growth pattern of recurrent respiratory papilloma (RRP) implants on chicken embryo chorioallantoic membranes (CAMs) and to evaluate possible associations between the clinical course of the disease and the behavior of experimentally implanted RRP tumors.

STUDY DESIGN

Experimental study.

METHODS

Fresh 172 RRP tissue samples from 12 patients were implanted onto chick embryo CAMs. Morphological and morphometric analysis of the experimental CAM and chorionic epithelium was performed. The microvascular network of the CAM with the RRP implant was investigated under the effect of fluoresceinated anionic dextran. The peculiarities of the clinical course of the disease were evaluated.

RESULTS

The implanted RRP tissue samples survived on CAMs in 86% of cases, retaining their essential morphologic characteristics and proliferative capacity of the original tumor. Implants induced thickening of both the CAM and the chorionic epithelium, but none of the RRP implants crossed the basement membrane of the hosting CAM. A "crawling film" of acellular material with newly formed papilloma sprouts located on the outer chorionic epithelium of the CAM was detected. Direct association between a recurrence rate of RRP and the number of newly formed papilloma sprouts around the implanted tumor on CAMs was revealed.

CONCLUSION

The chicken embryo CAM-based model is appropriate for investigations of RRP and facilitates the understanding of tumor biology and the clinical course of the disease, thus providing the basis for further research and acceleration of the identification and development of new specific therapeutic compounds that limit the spread and recurrence of RRP.

LEVEL OF EVIDENCE

N/A Laryngoscope, 131:E914-E920, 2021.