Hereditary systemic angiopathy (HSA) with cerebral calcifications, retinopathy, progressive nephropathy, and...

Area of Science:

• Neurology
• Genetics
• Vascular Biology

Background:

• Hereditary conditions affecting cerebral, retinal, and systemic microvessels, such as CADASIL, CRV, and HERNS, are increasingly recognized.
• A variant form of hereditary systemic angiopathy (HSA) has been identified in a Caucasian family across two generations.

Purpose of the Study:

• To describe a novel variant of hereditary systemic angiopathy (HSA).
• To detail the clinical, radiological, and pathological features of this rare vascular disorder.
• To emphasize the importance of early diagnosis and the limitations of current therapeutic options.

Main Methods:

• Clinical case study of a family with two affected generations.
• Detailed neurological examinations and symptom characterization.
• Radiological imaging (cerebral calcifications, white matter lesions).
• Multi-organ biopsies (brain, nerve, muscle, kidney, colon) for histopathological analysis.
• Review of previous therapeutic interventions.

Main Results:

• HSA presents in mid-adulthood with visual impairment, headaches, seizures, motor deficits, and cognitive decline, progressing to hepatic and renal failure.
• Ophthalmoscopic findings include retinal microaneurysms and optic disc atrophy.
• Radiology reveals cerebral calcifications and tumor-like white matter lesions.
• Biopsies demonstrate widespread small vessel disease with endothelial changes, inflammation, and thrombotic microangiopathy.
• Immunosuppressive therapies (cyclophosphamide, azathioprine, methotrexate) were ineffective.

Conclusions:

• This HSA variant represents a distinct hereditary systemic microvessel disease with multi-organ involvement.
• Early diagnosis is crucial to avoid unnecessary invasive procedures and harmful treatments.
• No effective curative therapies are currently available for this condition.