Infantile mitochondrial leucodystrophy - a case report

Area of Science:

• Pediatric Neurology
• Neuroscience
• Mitochondrial Diseases

Background:

• Leucodystrophy is a group of rare inherited disorders that affect myelin, the protective sheath of nerve fibers.
• Mitochondrial diseases are genetic disorders affecting mitochondria, the powerhouses of cells, leading to a wide range of symptoms.

Observation:

• A 7-month-old infant presented with psychomotor delay, abnormal reflexes, nystagmus, spasticity, and optic nerve atrophy.
• Clinical diagnosis was leucodystrophy, with imaging showing ventricular widening and frontal lobe atrophy. Generalized EEG changes and swallowing difficulties were noted.
• Autopsy revealed cardiac hypertrophy and orthochromatic leucodystrophy with neuropathological features of mitochondrial disease, including capillary changes, spongiosis, and brainstem damage.

Findings:

• Neuropathology indicated leucodystrophy with mitochondrial disease characteristics, specifically capillary hyperplasia, spongiosis, and symmetrical brainstem damage.
• Electron microscopy confirmed abnormal mitochondria and destruction of myelin and neurofibrils.
• The findings suggest a potential link between mitochondrial disease and cardiac hypertrophy in this case.

Implications:

• This case underscores the complex presentation of leucodystrophy and Leigh syndrome in infants.
• It highlights the importance of considering mitochondrial dysfunction in the differential diagnosis of pediatric neurological disorders with cardiac involvement.
• Further research into mitochondrial diseases is crucial for understanding and managing these devastating conditions.