Someone recently asked me on Twitter: Do I have to disclose my cancer to a new employer? This is one of the most common questions that we get. The quick and simple answer is: no. However, you do have to tell if you are requesting reasonable accommodations in order to perform your basic duties. The Americans with Disabilities Act, which protects you from discrimination and requires your employer to provide reasonable accommodations doesn't apply if you haven't disclosed your diagnosis. For more on the ADA and what constitutes a "reasonable accommodation," click here or here.