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Related Experiment Video

Updated: May 30, 2026

Technique of Conjunctival Biopsy and Direct Immunofluorescence for Diagnosing Mucous Membrane Pemphigoid

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Published on: June 17, 2025

Immunohistochemical differences between normal and chronically inflamed conjunctiva: diagnostic features.

Manisha Mehta¹, Sana S Siddique, Luis Alonso Gonzalez-Gonzalez

¹Department of Ophthalmology, Massachusetts Eye Research and Surgery Institution, Cambridge, MA 02412, USA.

The American Journal of Dermatopathology

|July 26, 2011

Summary

This summary is machine-generated.

Subepithelial fibrinogen in the conjunctiva is a normal finding. Its appearance, not just its presence, is key to diagnosing conditions like ocular cicatricial pemphigoid and lichen planus.

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Area of Science:

Ophthalmology
Histopathology

Background:

Conjunctival fibrinogen is often misinterpreted, leading to misdiagnosis of conditions like lichen planus.
Misdiagnosis can result in prolonged steroid treatment and delayed appropriate therapy for chronic conjunctivitis.

Purpose of the Study:

To investigate the occurrence and pattern of fibrinogen at the epithelial basement membrane zone (BMZ) in normal and inflamed conjunctiva.
To differentiate the histologic appearance of conjunctival fibrinogen in various cicatrizing conjunctivitis cases.

Main Methods:

Obtained bulbar conjunctiva samples from 10 patients with chronic conjunctivitis and 8 healthy controls.
Performed immunofluorescent staining with antifibrinogen antibodies, PAS, and Giemsa staining.

Main Results:

Basement membrane zone (BMZ) fibrinogen was present in all samples.
Normal conjunctiva and most chronic conjunctivitis cases showed linear, smooth BMZ fibrinogen.
Fragmented fibrinogen was seen in ocular cicatricial pemphigoid, while spikes and spurs were observed in lichen planus.

Conclusions:

Basement membrane zone (BMZ) fibrinogen is a normal component of the conjunctiva.
The morphological features of BMZ fibrinogen are crucial diagnostic indicators, not merely its presence.