Intraoperative Label-free Detection of Cholesteatoma Using Autofluorescence: A Feasibility Study.

Area of Science:

• Otolaryngology
• Medical Imaging
• Biophotonics

Background:

• Cholesteatoma, a destructive epidermal growth in the middle ear, poses surgical challenges.
• Accurate intraoperative identification of cholesteatoma is crucial for complete resection and preventing recurrence.

Purpose of the Study:

• To evaluate the efficacy of autofluorescence imaging in differentiating cholesteatoma from adjacent tissues during surgery.
• To assess the potential of autofluorescence as an adjunctive tool for intraoperative cholesteatoma detection.

Main Methods:

• Prospective cohort study involving 6 patients with cholesteatoma undergoing middle ear surgery.
• Utilized a custom endoscopic imaging system with 470 nm excitation light for real-time visualization.
• Compared autofluorescence signals from cholesteatoma, mucosa, bone, and granulation tissue.

Main Results:

• Autofluorescence imaging successfully delineated cholesteatoma from surrounding tissues, including bone, granulation tissue, and mucosa.
• The 470 nm excitation targeted endogenous fluorophores like flavin adenine dinucleotide (FAD) and keratin, which are specific to cholesteatoma.
• This method enhanced cholesteatoma identification, particularly in challenging cases where white light alone was insufficient.

Conclusions:

• Autofluorescence-guided identification of cholesteatoma is feasible intraoperatively.
• Autofluorescence imaging shows promise as a valuable adjunctive tool for surgeons in cholesteatoma surgery.