Nasal ridge curving posteriorly to an imaginary line that connects the nasal root and tip. The phenotype is Concave nasal ridge (HP_0011120, a Human Phenotype Ontology id). Also known as: Boxer's nasal deformity, Boxer's nose deformity, Concave dorsum of nose, Concave nasal dorsum, Saddle nose, Saddle shaped nasal dorsum, Ski jump nose.