What precaution should patients follow to preserve their markings during teletherapy?

The correct choice underscores the importance of preserving markings for patients undergoing teletherapy, which often involves radiation treatment. These markings are typically made with a specialized ink or tattoo that helps the radiation oncologist accurately target the treatment area. Preserving these markings is crucial because they guide the delivery of radiation, ensuring that it is administered to the correct location while minimizing exposure to surrounding healthy tissue.

Patients are encouraged to take care not to alter, wash off, or physically disrupt these markings, as any changes can lead to shifts in the therapy's effectiveness and could result in complications or missed treatment opportunities. This guidance is fundamentally about maintaining precise treatment accuracy.

The other options, while related to care and hygiene, do not directly relate to the priority of preserving the markings necessary for accurate treatment. Washing the area daily might inadvertently cause damage to the markings, using deodorant might irritate the skin or affect the visibility of the markings, and covering the area with bandages could obscure or smudge the markings. Therefore, focusing on the preservation of the marks is the most critical aspect patient must adhere to during their therapy.