Familial Cold Autoinflammatory Syndrome
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Familial Cold Autoinflammatory Syndrome is not the name you expected.
Familial cold autoinflammatory syndrome (FCAS), also known as familial cold urticaria, is a rare, inherited inflammatory disorder characterized by intermittent episodes of rash, fever, joint pain and other signs/symptoms of systemic inflammation triggered by exposure to cold. Onset of FCAS occurs during infancy and early childhood and persists throughout the patient's life.
FCAS is one of the cryopyrin associated periodic syndromes (CAPS) caused by mutations in the CIAS1/NLRP3 gene. These syndromes are characterized by fever, rash, and joint pain. As in other CAPS, amyloidosis can rarely develop later in life in FCAS patients. Amyloidosis is due to an abnormal accumulation of the protein amyloid in a patient's tissues and organs such as the kidneys where it results in damage and often kidney failure if untreated.
FCAS shares symptoms, and should not be confused, with acquired cold urticaria, a more common condition mediated by different mechanisms that usually develops later in life and is rarely inherited.
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Last Updated: 6/29/2015
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