Paraneoplastic pemphigus: an association with fludarabine?

Area of Science:

• Immunodermatology
• Onco-immunology
• Clinical Medicine

Background:

• Paraneoplastic pemphigus (PNP) is a rare, severe autoimmune blistering disease.
• It is associated with an underlying neoplasm, often lymphoproliferative disorders.
• Early diagnosis and management are crucial for patient outcomes.

Observation:

• Three adult male patients with chronic lymphocytic leukemia (CLL) developed PNP.
• The onset of PNP occurred within one week of completing fludarabine treatment.
• All patients presented with characteristic mucocutaneous blistering.

Findings:

• Withdrawal of fludarabine led to significant improvement in cutaneous manifestations.
• Fludarabine, a nucleoside analogue, is known to induce autoimmune phenomena.
• This suggests a potential role for fludarabine in the pathogenesis of PNP in these patients.

Implications:

• Fludarabine may trigger or exacerbate paraneoplastic pemphigus in susceptible individuals.
• Awareness of this potential adverse effect is important for clinicians treating CLL patients.
• Further research is warranted to elucidate the precise mechanisms linking fludarabine to PNP.