Cryofibrinogenemia: What Rheumatologists Should Know.

Area of Science:

• Rheumatology
• Hematology
• Dermatology

Background:

• Cryofibrinogenemia is a rare condition characterized by cryofibrinogen precipitating at low temperatures.
• Clinical manifestations include skin lesions (ulcers, necrosis, livedo reticularis), arthralgia, thrombosis, and limb ischemia.
• It presents diagnostic challenges, often considered in the differential diagnosis of antiphospholipid syndrome, vasculitis, TTP, and cryoglobulinemia.

Purpose of the Study:

• To increase physician awareness, particularly among rheumatologists, regarding the underdiagnosed condition of cryofibrinogenemia.
• To highlight the clinical features and diagnostic considerations of cryofibrinogenemia.
• To emphasize the need for further research into its prevalence and association with rheumatological disorders.

Main Methods:

• This is a narrative review.
• Literature search on cryofibrinogenemia, its clinical presentation, and diagnostic challenges.
• Review of histopathological findings and current management strategies.

Main Results:

• Cryofibrinogenemia presents with characteristic skin lesions and thrombotic events.
• Histopathology typically shows thrombi in dermal blood vessels without vasculitis.
• No validated classification criteria currently exist.

Conclusions:

• Cryofibrinogenemia is an underdiagnosed condition in rheumatological practice.
• Early recognition and diagnosis are essential for appropriate management, which may include corticosteroids, immunosuppressants, anticoagulants, and fibrinolytic agents.
• Further epidemiological studies are needed to determine its prevalence in rheumatological disorders and its potential associations.