Persistent Retinal Iron in Abusive Head Trauma.

Area of Science:

• Ophthalmology
• Pediatric Pathology
• Forensic Medicine

Background:

• Retinal hemosiderin deposition is a histological marker for retinal hemorrhages.
• Its persistence is typically assumed to be short-term, usually within 6-8 weeks post-hemorrhage in abusive head trauma (AHT).
• Accurate dating of retinal hemorrhages is crucial in AHT investigations.

Observation:

• A 5-month-old infant presented with signs of AHT, including subdural hematomas and retinal hemorrhages.
• At age 3, the patient experienced a femur fracture and later died.
• Ophthalmopathological examination revealed retinal and optic nerve atrophy with bilateral hemosiderin deposition.

Findings:

• The infant exhibited bilateral retinal hemosiderin deposition 32 months after the initial AHT event.
• This case demonstrates hemosiderin deposition persisting significantly longer than the commonly accepted 6-8 week timeframe.
• The findings challenge the established timeline for hemosiderin resolution in AHT.

Implications:

• The persistence of retinal hemosiderin deposition has significant implications for forensic investigations and the diagnosis of AHT.
• This case highlights the need to reconsider the temporal interpretation of hemosiderin in AHT.
• It suggests that hemosiderin deposition may be a more enduring indicator of past retinal hemorrhages than previously thought.