Association between the insertion type of the uncinate process and the development of Frontal Sinus Mucoceles - is there a relationship?

BACKGROUND: The frontal sinus drainage pathway is formed by either the ethmoid infundibulum or the middle meatus, which depends on the superior insertion of the uncinate process. According to Landsberg & Friedman the are 6 types of superior uncinate process insertion. The aim of this study is to find an association between the uncinate process insertion type and the development of frontal sinus mucoceles. METHODS: Fifty sinus CT scans were analysed. Exclusion criteria were previous nasal surgeries, malignancy, polyposis and an insufficient image quality. Superior insertions of the uncinate process were analysed according to the Landsberg & Friedman classification. The results were tabulated and analysed using SPSS 25.0. RESULTS: The analysis revealed type 1 insertion in 6% of the CT scans, type 2 in 32%, type 3 in 26%, type 4 in 0%, type 5 in 28% and type 6 in 8%. Despite 44% of the CT scans with frontal sinus mucocele showing a type 2 insertion of the uncinate process, both the Chi-Square test and the Cramer's V test showed no statistical significance (p>.05). Logistic regression also showed that uncinate process insertion type does not influence the likelihood of development of frontal sinuses mucoceles. CONCLUSIONS: The insertion of the uncinate process does not influence the development of frontal sinus mucoceles.

Association between the insertion type of the uncinate process and the development of Frontal Sinus Mucoceles - is there a relationship?

Background: The frontal sinus drainage pathway is formed by either the ethmoid infundibulum or the middle meatus, which depends on the superior insertion of the uncinate process. According to Landsberg & Friedman the are 6 types of superior uncinate process insertion.The aim of this study is to find an association between the uncinate process insertion type and the development of frontal sinus mucoceles.MethodsFifty sinus CT scans were analysed. Exclusion criteria were previous nasal surgeries, malignancy, polyposis and an insufficient image quality. Superior insertions of the uncinate process were analysed according to the Landsberg & Friedman classification. The results were tabulated and analysed using SPSS 25.0.ResultsThe analysis revealed type 1 insertion in 6% of the CT scans, type 2 in 32%, type 3 in 26%, type 4 in 0%, type 5 in 28% and type 6 in 8%. Despite 44% of the CT scans with frontal sinus mucocele showing a type 2 insertion of the uncinate process, both the Chi-Square test and the Cramer's V test showed no statistical significance (p>.05). Logistic regression also showed that uncinate process insertion type does not influence the likelihood of development of frontal sinuses mucoceles.ConclusionsThe insertion of the uncinate process does not influence the development of frontal sinus mucoceles. (AU)

Antecedentes: La vía de drenaje del seno frontal es formada por el infundíbulo etmoidal o por el meato medio, lo que depende de la inserción superior de la apófisis unciforme. Según Landsberg y Friedman hay seis tipos de inserción superior de la apófisis unciforme.El objetivo del estudio es entender si hay alguna correlación entre el tipo de inserción de la apófisis unciforme y el desarrollo de mucoceles del seno frontal.Material y métodosSe analizaron 50 tomografías computarizadas de los senos paranasales. Los criterios de exclusión fueron cirugías nasales previas, malignidad, poliposis y una calidad de imagen insuficiente. Las inserciones superiores de la apófisis unciforme fueron analizadas según la clasificación de Landsberg y Friedman. Los resultados se tabularon y analizaron usando el SPSS 25.0.ResultadosEl análisis reveló la inserción de tipo 1 en 6% de las tomografías computarizadas, tipo 2 en 32%, tipo 3 en 26%, tipo 4 en 0%, tipo 5 en 28% y tipo 6 en 8%. A pesar de que el 44% de las tomografías computarizadas con mucocele del seno frontal muestran una inserción de tipo 2 de la apófisis unciforme, tanto la prueba de X2 como la prueba de V de Cramer, no mostraron significación estadística (p > 0,05). La regresión logística también demostró que el tipo de inserción de la apófisis unciforme no influye en la probabilidad de desarrollo de mucoceles de los senos frontales.ConclusiónLa inserción de la apófisis unciforme no influye el desarrollo de los mucoceles en los senos frontales. (AU)

Alteraçöes dos capilares da "Stria vascularis" em diabetes experimental / Capillaries changes of the Stria vascularis in experimental diabetes

Chinchilas foram feitas diabéticas com uma única injeçäo intraperitoneal de streptozotocin na dose de 100 mg/kg e o estado hipergicêmico foi comprovado através de curvas glicêmicas realizadas periodicamente. Após três, seis e 12 meses de diabetes experimental estabelecido, grupos de animais foram sacrificados com dose maciça de pentobarbital pela via intraperitoneal, decapitados e tiveram os ossos temporais removidos para estudo morfológico. Foram usadas duas técnicas de coloraçäo em preparaçöes convencionais de osso temporal: hematoxilina e eosina e PAS (Periodic-Acid-Schiff). Cortes finos de ducto coclear semelhantes aos usados para microscopia eletrônica foram corados pela técnica de Gomori (PASM-Periodic-Acid-Schiff-methenamine-silver). Esta última técnica tem sido muito útil na demonstraçäo de membranas basais em capilares dos rins e de outros órgäos, mas nunca foi usada para os capilares da cóclea. Os resultados deste estudo morfológico säo relatados e comentados nesta comunicaçäo