Agents that cause defects in an embryo are called __________

A 68-year-old man has a small squamous cell carcinoma of the right posterior lateral border of the tongue. If left untreated, this lesion would most likely metastasize first to which of the fol-lowing?

a. Submental lymph nodes b. Submandibular lymph nodes c. Mandible d. Lung

Insurance companies and other third-party payers of treatment require original radiographs for pretreatment authorization purposes

Indicate whether the statement is true or false