As of December 2017, the most common conditions certified by the World Trade Center Health Program were rhinosinusitis, gastroesophageal reflux disease (GERD), asthma, sleep apnea, cancer, posttraumatic stress disorder, respiratory disease, chronic obstructive pulmonary disease, depression, and anxiety disorder. The most common cancers were skin cancer and prostate cancer. The World Trade Center Health Program regularly publishes the most commonly certified condition on its website.[3]