Definition: It is a fracture that is difficult to detect or difficult to detect in time with conventional X-ray and can be detected only after a period of time or with other imaging methods. It is one of the common causes of misdiagnosis and underdiagnosis. Common occult fractures: circumflex, knee, hip, shoulder, foot tarsal, rib, wrist, ankle, elbow, sacrococcygeal, temporomandibular, cervical spine spine – Common occult fractures: circumflex, knee, hip, shoulder, foot tarsal, rib, wrist, ankle, elbow, sacrococcygeal, temporomandibular, cervical spine spine thoracic rib joint, mandible, thyroid cartilage, hyoid bone, sinus bone prominence, thoracic rib joint, mandible, thyroid cartilage, hyoid bone, sinus bone, etc.