Diffuse large B cell lymphoma in a patient with hypocomplementemic urticarial vasculitis.

Area of Science:

• Immunodermatology
• Oncology
• Hematology

Background:

• Hypocomplementemic urticarial vasculitis (HUV) is an autoimmune condition characterized by urticarial lesions, low complement levels, and vasculitis.
• HUV is recognized to have potential associations with various hematologic malignancies, particularly lymphomas.
• While urticarial vasculitis is linked to lymphomas, the specific association between HUV and non-Hodgkin lymphoma remains under-documented in medical literature.

Observation:

• This case report describes a patient initially diagnosed with Hypocomplementemic urticarial vasculitis (HUV).
• The patient subsequently developed a distinct hematologic malignancy ten years after the initial HUV diagnosis.
• The diagnosed malignancy was identified as diffuse large B cell lymphoma, a subtype of non-Hodgkin lymphoma.

Findings:

• The study presents a unique temporal association between Hypocomplementemic urticarial vasculitis and the subsequent development of diffuse large B cell lymphoma.
• This case highlights a potential, previously undescribed link between HUV and non-Hodgkin lymphoma.
• The ten-year interval between HUV onset and lymphoma diagnosis suggests a possible long-term association.

Implications:

• This case underscores the importance of considering underlying malignancies in patients diagnosed with Hypocomplementemic urticarial vasculitis.
• Further research is warranted to elucidate the potential pathogenetic mechanisms linking HUV and non-Hodgkin lymphoma.
• Clinicians should maintain a high index of suspicion for hematologic neoplasms in patients with persistent or recurrent HUV.