Kaposi's sarcoma (KS) usually occurs when CD4+ lymphocyte counts are:
When CD4 count falls less than 200/L, the patient develops full-blown AIDS. This stage is characterized by the development of HIV wasting syndrome with weight loss and diarrhea for 1 month.
The patients with AIDS show a marked susceptibility to the development of malignancies. 
Human herpes virus-8–associated Kaposi’s sarcoma is the most noted malignancy associated with AIDS.

​Parija SC. Textbook of Microbiology & Immunology. Elsevier Health Sciences; 2014. Page:571
Above 600
Between 1000-2000
Below 200
Above 2000