Differential Diagnosis for Autoimmune Disorder with Frequent Passing Out
- Single most likely diagnosis
- Postural Orthostatic Tachycardia Syndrome (POTS): This condition is often associated with autoimmune disorders and can cause frequent passing out due to a sudden drop in blood pressure when standing up. It's a common cause of orthostatic intolerance in patients with autoimmune diseases.
- Other Likely diagnoses
- Autoimmune Autonomic Ganglionopathy: This is a rare autoimmune disorder that affects the autonomic nervous system, leading to orthostatic intolerance and potentially causing frequent passing out.
- Multiple System Atrophy (MSA): Although not exclusively an autoimmune disorder, MSA can have autoimmune components and causes autonomic dysfunction, including orthostatic hypotension, which may lead to passing out.
- Do Not Miss diagnoses
- Addison's Disease: An autoimmune disorder that causes adrenal insufficiency, potentially leading to hypotension and passing out. Missing this diagnosis could be life-threatening due to the risk of adrenal crisis.
- Myasthenia Gravis: An autoimmune neuromuscular disorder that can cause muscle weakness, potentially affecting respiratory and bulbar muscles, leading to sudden loss of consciousness.
- Rare diagnoses
- Autoimmune Hypopituitarism: A rare condition where the immune system attacks the pituitary gland, potentially leading to various hormonal deficiencies, including adrenal insufficiency, which could cause passing out.
- Stiff Person Syndrome: A rare autoimmune disorder characterized by progressive stiffness and rigidity of the muscles, which can lead to impaired mobility and potentially cause falls or passing out due to loss of balance.