The nose is made up of a fixed and rigid part that is called nasal pyramid, although it rather has the shape of a tent or roof, and a pliable mobile part which is the nasal tip, the alae and its annexes. The nasal tip and the alae are structured by the so called alar or lower lateral horseshoe shaped cartilages with their lateral and medial crura or crus and accessory cartilages, the domes between lateral and medial cruras, the interdomal fibrofatty pad, the caudal or lower septum and the skin of the alae.
Both halves of the nasal tip join with each other in the center of the tip to form a tripod in which the lateral legs are the lateral cruras of the alar or lower lateral cartilages and the central leg the union of both medial cruras of the alar or lower lateral cartilages.
Nasal tip bossing irregularities can be due to different causes which might coexist in one particular case, however the majority are post surgical situations; poorly planned, designed and placed tip grafts, damages, random sections, flipping and nonsensical transections on the dome cartilages, skin damage at the tip, fillers and finally, as a congenital cause, the severe asymmetry of nasal domes, their inversion or differential medial cruras support may also produce a tip bossing deformity, aggravated in cases with thin skin cover at the tip.
Treatment of nasal tip bossae has to be customized to each individual situation, under direct visualization by means of open rhinoplasty approach, addressing each and every of the problems underlying this heterogeneous group of deformities, all of them treated with structure rhinoplasty procedures with massive grafting and plasties to repair issues and reshape the nasal tip and its annexes.