Single Nasal Bones: A Report of Two Cases

The nasal bones are important bony parts of the external nose and maxillofacial scaffold. Generally, the nasal bone is a small quadrangular plate paired and attached to the frontonasal suture superiorly and the nasal septum internally. The nasal septum is symmetrically located and comprises the septal cartilage, the perpendicular plate of the ethmoid bone, and the vomer. Herein, we report the anatomy of single nasal bones (SNB) identified in two human skulls. Two adult human skulls were found to have SNB. In one, the nasal septum was bifid and hooked as it joined with the nasal bone superiorly. Understanding the morphological variations of the nasal bone and septum is important for maxillofacial surgeries and should be further clarified and studied. Although apparently very rare, a SNB, as seen in the present two cases, should be considered when interpreting imaging of the face.