The key feature that indicates malignancy in a client with acute immunodeficiency syndrome (AIDS) is Kaposi sarcoma.
Kaposi sarcoma can be defined as a type of malignant cancer observed in mucous cell layers of the gastrointestinal system that may be serious if it is not treated at time.
In conclusion, the key feature that indicates malignancy in a client with acute immunodeficiency syndrome (AIDS) is Kaposi sarcoma.
Learn more about Kaposi sarcoma here:
https://brainly.com/question/11991778
#SPJ1