Prognostic factors in Kaposi sarcoma, single centre experience.

Background: Kaposi sarcoma (KS) is a multicentric vascular and lymphatic neoplasm caused by human herpesvirus 8 (HHV-8). It generally concerns the elderly and immunosuppressed population. Four major clinical types of KS have been described. The most common subtype is Classical KS (CKS).

Objectives: Our retrospective study aimed to better define prognostic subgroups among patients with CKS, which is the most common in our country.

Method: Between 2014 and 2020, 43 patients with CKS were treated with local excision, radiotherapy and chemotherapy. Reviewed information included demographics, clinical features, laboratory findings, treatment responses and overall survival.

Results: During the follow-up, eight patients (18.6%) died of CKS. The complete response rate was 46.5%, partial response and stable disease 51.2%, and progressive disease 2.3% of all patients. Gender, haemoglobin level at diagnosis, and disseminated involvement were prognostic factors affecting survival in all patients.

Conclusion: We confirmed that male gender, low haemoglobin levels, and disseminated involvement are associated with poor prognosis in CKS patients. It is the only Turkish study in which prognostic analysis was performed for this rare cancer.