RESUMO
OBJECTIVE: To establish whether nasal bony landmarks on computed tomography could be utilised reliably in endoscopic approaches to the sphenopalatine foramen. METHODS: A prospective analysis of 102 consecutive helical computed tomography scans of the paranasal sinuses was carried out by 2 senior ENT surgeons. Distances from the sphenopalatine foramen to endoscopically palpable bony landmarks were measured. RESULTS: There were a total of 102 patients (45 females and 57 males), with a mean age of 62 years. The mean distance from the posterior fontanelle to the sphenopalatine foramen was 14.1 mm (standard deviation = 2.13). The average vertical distance of the sphenopalatine foramen opening from the bony attachment of the inferior turbinate was 14.13 mm. There were no statistically significant differences between any of these measurements (foramen width p-value = 0.714, distance from fontanelle p-value = 0.43 and distance from inferior turbinate p-value = 0.48). CONCLUSION: Determination of reliable bony landmarks is clinically useful in endoscopic surgery and can aid identification of the sphenopalatine foramen. The inferior turbinate concha and posterior fontanelle may be used as reliable computed tomography landmarks for endoscopic approaches to the sphenopalatine foramen.
Assuntos
Pontos de Referência Anatômicos/diagnóstico por imagem , Osso Nasal/diagnóstico por imagem , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Pontos de Referência Anatômicos/cirurgia , Artérias/anatomia & histologia , Criança , Endoscopia/métodos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Osso Nasal/anatomia & histologia , Osso Nasal/cirurgia , Mucosa Nasal/irrigação sanguínea , Seios Paranasais/anatomia & histologia , Seios Paranasais/diagnóstico por imagem , Estudos Prospectivos , Fossa Pterigopalatina/anatomia & histologia , Fossa Pterigopalatina/irrigação sanguínea , Fossa Pterigopalatina/cirurgia , Tomografia Computadorizada Espiral/métodos , Tomografia Computadorizada por Raios X/métodos , Conchas Nasais/anatomia & histologia , Conchas Nasais/diagnóstico por imagemRESUMO
Congenital dermoid cysts are benign developmental lesions and are a well-recognised entity in head and neck surgery. First reported in 1828 by Berger et al., these lesions have been referred to as dermoids, hairy polyps, teratoid tumours with varying classification systems. This has caused confusion in the medical literature with a lack of consensus regarding optimal diagnosis and management. Within the Eustachian tube, there have been 16 reported cases in the English literature demonstrating the rarity of these lesions. The aim of this report is to present a case of histopathologically confirmed Eustachian tube dermoid, confirm the current classification system and demonstrate the challenges they can pose given the relative inaccessibility of such lesions.
