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Updated: Aug 12, 2026

Enrichment of Bruch's Membrane from Human Donor Eyes
Published on: November 15, 2015
Multinucleated giant cells on Bruch's membrane late in recurrent retinal and subretinal hemorrhaging
1Department of Ophthalmology, University of Michigan Hospitals, Ann Arbor.
Abstract:
Two cases with a history of recurrent subretinal hemorrhaging are reported. Multinucleated giant cells of macrophage origin were demonstrated on Bruch's membrane in a few stages of their functions of phagocytosis of old blood and storage of blood remnants. Their classification as foreign-body giant cells fails to recognize the important purification, disposal and storage functions of these cells in situations with extensive intraocular hemorrhage, exudation or necrosis.
Insights
Multinucleated giant cells on Bruch's membrane aid in clearing intraocular hemorrhage. These macrophage-derived cells perform vital purification and storage functions, distinct from foreign-body responses.
Area of Science:
- Ophthalmology
- Cell Biology
- Pathology
Background:
- Recurrent subretinal hemorrhaging presents a clinical challenge.
- Understanding the cellular mechanisms of hemorrhage resolution is crucial.
Observation:
- Multinucleated giant cells of macrophage origin were identified on Bruch's membrane.
- These cells were observed during various stages of processing blood remnants.
Findings:
- The identified giant cells actively phagocytose old blood and store residual blood components.
- Their function extends beyond simple foreign-body reactions, involving critical cleanup roles.
Implications:
- Reclassifying these cells acknowledges their specialized roles in intraocular hemorrhage management.
- This finding may inform future therapeutic strategies for retinal bleeding disorders.
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