Pereira Filipe José, Velasco e Cruz Antonio Augusto, Anselmo-Lima Wilma Teresinha, Elias Júnior Jorge
São Paulo University, Ribeirão Preto, SP, Brazil.
Arq Bras Oftalmol. 2006 Jul-Aug;69(4):513-8. doi: 10.1590/s0004-27492006000400011.
To describe the CT findings of orbital cellulitis due to sinusitis.
The records and CT scans of 45 consecutive patients with orbital cellulitis due to sinusitis treated at the Hospital of the Medical School of Ribeirão Preto were analyzed by a radiologist and two orbital surgeons.
Three major types of CT changes were observed: diffuse fat infiltration, subperiosteal abscess and orbital abscess. Diffuse fat infiltration (characterized by an increased density of the extra- or intraconal fat) was seen in 11 patients (24.44%). A subperiosteal abscess was diagnosed in 28 patients (62.23%). A surgically proved orbital abscess was detected in 6 patients (13.33%).
In all cases of orbital cellulitis due to sinusitis intraorbital changes can be detected by CT scans either as a diffuse infiltration of the orbital fat or as a detachment of the periorbita (subperiosteal abscess) or a true orbital abscess. Category I of Chandler orbital cellulitis classification (inflammatory edema) must be understood as a stage of a process that is already happening within the orbit and, as the term "preseptal cellulitis" means a palpebral infection, this designation should not be used to stage orbital cellulitis.
描述鼻窦炎所致眶蜂窝织炎的CT表现。
对里贝朗普雷图医学院医院收治的45例连续性鼻窦炎所致眶蜂窝织炎患者的记录及CT扫描进行分析，分析者为一名放射科医生和两名眼眶外科医生。
观察到三种主要类型的CT改变：弥漫性脂肪浸润、骨膜下脓肿和眶内脓肿。11例患者（24.44%）出现弥漫性脂肪浸润（表现为眶内或眶外脂肪密度增加）。28例患者（62.23%）诊断为骨膜下脓肿。6例患者（13.33%）经手术证实存在眶内脓肿。
在所有鼻窦炎所致眶蜂窝织炎病例中，CT扫描均可检测到眶内改变，表现为眶脂肪弥漫性浸润、眶隔分离（骨膜下脓肿）或真正的眶内脓肿。钱德勒眶蜂窝织炎分类的I类（炎性水肿）应被理解为眼眶内已发生过程的一个阶段，并且由于“眶隔前蜂窝织炎”一词指睑部感染，该名称不应被用于眶蜂窝织炎的分期。
