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The Moyamoya Disease in Adults Key Indications

A young woman is lying in a hospital bed, holding a glass of orange juice. She's wearing a medical gown and appears to be recovering or resting. The room has bright light coming through the window, suggesting it might be early morning or daytime. There are various medical items around her such as bottles that could contain medication or fluids.
A young woman is lying in a hospital bed, holding a glass of orange juice. She's wearing a medical gown and appears to be recovering or resting. The room has bright light coming through the window, suggesting it might be early morning or daytime. There are various medical items around her such as bottles that could contain medication or fluids.

Moyamoya Disease in Adults Key Indications

Moyamoya Disease in Adults Key Indications Moyamoya disease in adults is a rare, progressive cerebrovascular disorder characterized by the narrowing or occlusion of the terminal portions of the internal carotid arteries and their main branches. This leads to the development of a delicate network of collateral vessels that resemble a “puff of smoke” on imaging studies, which is where the disease gets its name (“moyamoya” means “hazy” or “puff of smoke” in Japanese). While moyamoya is often diagnosed in children, adult-onset cases present unique clinical features and challenges, making early recognition vital for effective management.

Moyamoya Disease in Adults Key Indications One of the primary indications for suspecting moyamoya in adults is the presentation of transient ischemic attacks (TIAs) or ischemic strokes. Adults with moyamoya frequently experience recurrent episodes of neurological deficits, such as weakness, numbness, or speech difficulties, often affecting one side of the body. These symptoms result from reduced cerebral blood flow due to progressive arterial stenosis. Because these episodes can be mistaken for other stroke subtypes, a high index of suspicion is necessary, especially in younger adults presenting with unexplained ischemic events.

Hemorrhagic strokes are another key indication in adult moyamoya disease. Unlike in children, where ischemic episodes are more common, adults are more prone to intracranial hemorrhages, especially intracerebral or subarachnoid hemorrhages. The fragile collateral vessels that develop in response to arterial occlusion are prone to rupture, leading to bleeding. Therefore, sudden-onset severe headache, altered consciousness, or neurological deficits in adults with known or suspected moyamoya should prompt immediate imaging to evaluate for hemorrhage. Moyamoya Disease in Adults Key Indications

Moyamoya Disease in Adults Key Indications Recurrent, unexplained headaches can also be an indication, especially when accompanied by other neurological symptoms. While headaches are less specific, they may signal increased intracranial pressure or vascular instability asso

A young woman is lying in a hospital bed, holding a glass of orange juice. She's wearing a medical gown and appears to be recovering or resting. The room has bright light coming through the window, suggesting it might be early morning or daytime. There are various medical items around her such as bottles that could contain medication or fluids.
A young woman is lying in a hospital bed, holding a glass of orange juice. She’s wearing a medical gown and appears to be recovering or resting. The room has bright light coming through the window, suggesting it might be early morning or daytime. There are various medical items around her such as bottles that could contain medication or fluids.

ciated with moyamoya. Additionally, some adults may present with seizures, which can occur due to chronic ischemia or hemorrhages affecting cortical structures.

Diagnosis hinges on neuroimaging. Magnetic resonance angiography (MRA) and computed tomography angiography (CTA) are non-invasive methods that reveal the characteristic stenosis of the terminal internal carotid arteries and the abnormal collateral networks. Digital subtraction angiography (DSA), considered the gold standard, provides detailed visualization of cerebral vasculature, helping confirm moyamoya and plan surgical interventions if needed. Moyamoya Disease in Adults Key Indications

Management strategies aim to prevent strokes and improve cerebral perfusion. Medical treatments often include antiplatelet agents to reduce thrombotic risk, but they do not alter the disease course. Surgical revascularization procedures, such as direct bypass (e.g., superficial temporal artery to middle cerebral artery anastomosis) or indirect techniques (e.g., encephaloduroarteriosynangiosis), are indicated in many adult cases to restore adequate blood flow and reduce the risk of future ischemic or hemorrhagic events.

Moyamoya Disease in Adults Key Indications In summary, key indications for suspecting moyamoya in adults encompass recurrent ischemic symptoms, hemorrhagic strokes, unexplained headaches, and seizures, especially when neuroimaging reveals characteristic vascular changes. Prompt recognition and intervention are essential to prevent severe neurological deficits and improve long-term outcomes.

*The information on our website is not intended to direct people to diagnosis and treatment. Do not carry out all your diagnosis and treatment procedures without consulting your doctor. The contents do not contain information about the therapeutic health services of Acıbadem Health Group.
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