[Unilateral coana atresia. A pediatric case report].

Choanal atresia is characterized by obliteration of the posterior nasal opening. It is the most common congenital anomaly of the nasal passages. It has an incidence of 1 in 5000 to 7000 newborns; predominantly female.

[Complicated cholesteatoma in a child with Down syndrome: a case report].

Acquired cholesteatoma in children is an aggressive disease due to its rapid growth and high recurrence rate. The complications are divided into intra-and extratemporal complications or intracranial complication. Subperiosteal abscess is the most common extratemporal complication.

[Septal hematoma: Report of two pediatric cases].

Hematomas and septal abscesses are an emergency in rhinology and require early surgical treatment due to the risk of infectious, functional, and aesthetic complications. They generally occur as a consequence of nasal trauma, although they have also been described in relation to other triggers. Accumulation of blood or pus between the mucoperichondrium and septal cartilage, causes avascular necrosis injury to the cartilage with cartilage destruction.

[Traumatic perilymphatic fistula. Report of a pediatric case].

Traumatic perilymphatic fistula is an unusual pathology. Generally caused by pencils, swabs, hair buckles, and matches. Among the most frequent symptoms, patients can present hearing loss and vertigo.