Clinicopathologic features of excised mitomycin filtering blebs

Area of Science:

• Ophthalmology
• Glaucoma Surgery
• Tissue Engineering

Background:

• Trabeculectomy is a common glaucoma surgery.
• Mitomycin is used to enhance surgical outcomes.
• Ocular hypotony can be a complication of glaucoma surgery.

Observation:

• Two conjunctival filtering blebs post-trabeculectomy with mitomycin were examined after excision for hypotony.
• Microscopy revealed attenuated epithelium and loose subepithelial connective tissue.
• Activated fibrocytes and inflammatory cells were observed in the bleb tissue.

Findings:

• Mitomycin may attenuate, but not eliminate, the inflammatory response, possibly due to concurrent infections.
• Hypotony and bleb failure were likely caused by over-filtration and wound leaks.
• A lack of postoperative subconjunctival fibrosis, secondary to mitomycin, contributed to bleb failure.

Implications:

• Understanding mitomycin's effect on bleb healing is crucial for managing glaucoma surgery complications.
• Further research may explore strategies to optimize subconjunctival fibrosis post-mitomycin treatment.
• This study highlights the complex interplay between mitomycin, inflammation, and bleb function.