The U.S. Equal Employment Opportunity Commission (EEOC) enforces the employment provisions of the ADA.  The EEOC has issued the fourth in a series of question-and-answer documents addressing particular disabilities in the workplace. It explains how the ADA might apply to job applicants and employees who have or had cancer.  In particular, this guide explains:

* when cancer is a disability under the ADA;

* when an employer may ask an applicant or employee questions about his or her cancer and how it should treat voluntary disclosures;

* what types of reasonable accommodations employees with cancer may need; and,

* how employers can ensure that they do not discriminate against applicants and employees with cancer.

You can read more at http://www.eeoc.gov/facts/cancer.html