<prompt> Panda sign:Unilateral sign of anterior cranial fossa fractureBilateral sign of anterior cranial fossa fractureUnilateral sign of posterior cranial fossa fractureBilateral sign of posterior cranial fossa fracture  <response>: Periorbital Ecchymosis Racoon Eyes Panda sign: Anterior Cranial Fossa Fracture - Usually BL. Longitudinal A and transverse B fractures of petrous pyramid of temporal bone, and anterior basal skull fracture C Panda bear or raccoon sign due to leakage of blood from anterior fossa into periorbital tissues, Absence of conjunctival injection differentiates fracture from direct eye trauma. 