Rare Disorders

These conditions may be infrequent, but that doesn't make them any less scary or puzzling. Causes can range from genetic abnormalities to certain diseases and infections.

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My Constant Insomnia Turned Out to Be a Symptom of a Rare Disorder Called Hypophosphatasia

After doctors couldn't figure out why she was suffering such terrible insomnia, Heather Barrow, 41, did her own research—and she learned she was born with a rare genetic disorder that also affected her mom and teenage daughter.
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