Kaposi's sarcoma following immunosuppressive therapy for vasculitis

Area of Science:

• Oncology
• Nephrology
• Immunology

Background:

• Kaposi's sarcoma (KS) is a known complication following renal transplantation, often linked to human herpesvirus 8 (HHV-8) reactivation.
• Immunosuppressive therapy post-transplantation is a significant risk factor for developing KS.

Observation:

• A 50-year-old woman developed KS 18 weeks after initiating immunosuppressive therapy for vasculitis.
• The patient exhibited positive IgG antibodies to HHV-8, indicating prior exposure and potential reactivation.
• Initial management involved interrupting cyclophosphamide and tapering prednisone, leading to KS lesion regression and clinical stabilization.

Findings:

• Despite initial improvement, the patient later presented with diffuse cutaneous KS, necessitating complete steroid withdrawal.
• Discontinuation of steroids resulted in rapid deterioration of her general status and renal function.
• The patient ultimately succumbed to disseminated intravascular coagulation syndrome.

Implications:

• This case highlights the complex interplay between immunosuppression, HHV-8, and KS development in transplant recipients.
• The management of KS in this context requires careful balancing of immunosuppression withdrawal against the risk of graft rejection and disease progression.
• The case underscores the potential for severe outcomes, including death, from disseminated KS in immunocompromised individuals.