1) The document discusses calcaneal fractures, which are the most common tarsal bone fractures, usually caused by an axial load.
2) CT scans and X-rays are used to classify the fractures based on the Sanders and Essex-Lopresti classifications, which identify involvement of the posterior facet joint.
3) Treatment depends on the classification and displacement. Non-operative treatment is used for non-displaced fractures while operative treatment with open reduction and internal fixation is used for displaced intra-articular fractures to restore the anatomy.