[Dermatological manifestations of monoclonal gammopathies]

Area of Science:

• Hematology
• Dermatology
• Oncology

Background:

• Monoclonal gammopathies of uncertain significance (MGUS) are pre-malignant hematological disorders.
• MGUS involves monoclonal protein production and <10% bone marrow plasma cell infiltration.
• MGUS carries risks of malignant progression and associations with renal, neurological, and skin conditions.

Purpose of the Study:

• To review the literature on the relationship between monoclonal gammopathies (MGs) and skin diseases.
• To elucidate the pathophysiological mechanisms linking MGs and specific skin manifestations.
• To propose a screening algorithm for MGs in patients with particular dermatological conditions.

Main Methods:

• Exhaustive literature review on MGUS and associated skin diseases.
• Analysis of pathophysiological mechanisms supporting causal relationships.
• Development of a diagnostic screening algorithm for MGs based on dermatological findings.

Main Results:

• Established causal links between MGs and skin diseases like cryoglobulinemia, amyloidosis, and xanthogranuloma.
• Identified a subset of skin diseases with unclear pathogenesis linked to MGs.
• Highlighted the critical role of dermatologists in early detection and multidisciplinary management.

Conclusions:

• Dermatologists are essential in suspecting hematological disorders based on skin signs.
• A multidisciplinary approach is vital for managing patients with MGUS and skin manifestations.
• The proposed screening algorithm aims to improve early diagnosis of MGs in at-risk patients.