Flagellate dermatitis after bleomycin. A histological and immunohistochemical study

Area of Science:

• Dermatology
• Oncology
• Pathology

Background:

• Hodgkin's disease is a type of lymphoma that affects the lymphatic system.
• Bleomycin is a chemotherapy agent used in the treatment of various cancers, including Hodgkin's disease.
• Flagellate dermatitis is a rare adverse reaction to certain medications, characterized by a whip-like rash.

Observation:

• A patient with Hodgkin's disease developed flagellate dermatitis following bleomycin administration.
• The skin eruption presented as erythematous lesions with a characteristic linear or reticulated pattern.
• Post-inflammatory hyperpigmentation was noted after the resolution of the acute rash.

Findings:

• Histopathological and immunohistochemical analyses confirmed a drug-induced toxic reaction in the skin.
• The findings excluded a lymphomatous infiltration of the skin as the cause of the dermatitis.
• The pigmentary changes were attributed to a postinflammatory process.

Implications:

• This case highlights the importance of recognizing bleomycin-induced flagellate dermatitis as a distinct clinical entity.
• Accurate diagnosis through histopathological examination is crucial to differentiate it from cutaneous lymphoma.
• Understanding the postinflammatory nature of pigmentary changes can aid in patient counseling and management.