[Zuckerkandl's tubercle. Location, shape and dimensions].

Introduction And Objective: Although Zuckerkandl's tubercle is not known by many head and neck surgeons, it is a fundamental surgical anatomical detail, already described in the nineteenth century. Its detection is of great importance as the reference in the search for the recurrent nerve and superior parathyroid gland.

Material And Method: We designed a prospective study to analyse the posterolateral border of thyroid lobes, looking for this tubercle.

[The avian middle ear (Struthio camelus). Data for the physiology of sound transmission in systems with a single ossicle in the chain].

Introduction And Goals: The columella of birds, often cited in the literature, has yet to be adequately described. We aim to give an account of this transmission element, describing its anchoring systems and detailing the muscle associated to it.

Material And Method: We performed microscopic dissection and obtained images of ostrich specimens (Struthio camelus), chosen because it is the bird with the largest head.