CT classification and significance of lamina papyracea ingression in orbital medial wall / 中国耳鼻咽喉头颈外科

ABSTRACT

OBJECTIVE To investigate the CT classification of the lamina papyracea ingression and its significance. METHODS Data of computed tomography(CT) were analyzed retrospectively in 928 patients with nasal symptoms in out-patient department of Huairou Hospital from April 2017 to September 2017. All data were analyzed predicatively to observe the prevalence of lamina papyracea ingression. RESULTS The probability of lamina papyracea ingression in this group was 6.03％(112/1856). The lamina papyracea ingression were divided into four types on the basis of the coronal CT: upper medial rectus type, medial rectus type, under medial rectus type and generalized type. There was no difference in the incidence between the under medial rectus type and the extensive type(P=1.00), there were significant differences in the incidence of the remaining types(P=0.00). CONCLUSION In this study, the classification of the lamina papyracea ingression on coronal CT is helpful to understand lamina papyracea ingression better and reduce the intraorbital complicatians of endoscopic sinus surgery.