Final answer:
A BIRADS 4 lesion has a 20% to 35% chance of being cancerous, indicating the need for further diagnostic procedures such as a biopsy.
Step-by-step explanation:
A BIRADS 4 lesion typically suggests a suspicion of cancer, where the probability of malignancy ranges from 20% to 35%. This reflects a need for further investigation, often including a biopsy, to determine if the lesion is indeed cancerous. A BIRADS 4 lesion is not a definitive diagnosis of cancer, but rather an indication of the possibility based on imaging characteristics.
Factors that can influence the risk of a lesion being malignant include a history of being diagnosed with precancerous skin lesions, having a family history of skin cancer, having a personal history of skin cancer, having a weakened immune system, and being exposed to other forms of radiation or to certain toxic substances like arsenic.