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Left 10° cranial 25° ventral-right caudodorsal oblique projection showing the right first and second ribs, obtained in a 4-year-old warmblood gelding. A rudimentary first rib is visible (arrow) (Grade 3/3) and C7 shows complete transposition of the ventral lamina (Grade 3). Second rib width is classified with grade 1. The head of the horse is to the left.
