Which type of research investigates past events and records?

Lateral medullary syndrome is characterized by

a. Horner's syndrome, loss of pain and temperature over ipsilateral face and contralateral body, and disturbances in equilibrium sense b. Paralysis of ipsilateral tongue and weakness of contralateral body c. Coma and death d. Oculomotor ophthalmoplegia and weakness of the contralateral body

This patient returns to the office today to follow up on a Torus fracture of the upper end of the right tibia. An X-ray was taken and there is nonunion of the fracture. This would be reported with code _____

Fill in the blank(s) with correct word