Dear Sir: Thank you for that pointing it out. All the CT images were read and reread by an experienced radiologist whose skill is beyond reproach and experience unquestionable. The results of the study therefore are verifiable and it, too, will stand scrutiny. There were no mistakes or mislabelling of the CT scan images of each patient. The reported result of only 3 otic-involved fractures out of 41 patients included in the study stands and is spot on.
Objective: To compare the proportion of temporal bone fractures using traditional (longitudinal vs. transverse) and otic involvement (otic sparing vs. non-otic sparing) classification schemes and their relationship with the development of facial paralysis. Methods: Design: Retrospective Case Series Settings: Tertiary Government Hospital Patients: Records of 49 patients diagnosed with temporal bone fracture in our institution from August 2016 to June 2018. Results: A total of 41 records of patients with temporal bone fractures, 32 males, 9 females, aged 5 to 70 years-old (mean 37.5-years-old) were included. In terms of laterality 23 (56%) involved the right and 17 (41%) the left side. Traditionally classified, 32 (78%) were longitudinal and 9 (22%) were transverse. Using newer classification based on otic involvement and non-otic involvement, 38 (93%) were otic-sparing and 3 (7%) were non otic-sparing. Only 9 (22%) out of 41 total fracture patients developed facial paralysis, involving 7 of the 32 longitudinal fractures and 2 of the 9 transverse fractures, or 8 of the 38 otic-sparing and 1 out of 3 non otic-sparing fractures. Conclusion: Because of the small sample size, no conclusions regarding the proportion of temporal bone fractures using traditional (longitudinal vs. transverse) and otic involvement (otic sparing vs. non-otic sparing) classification schemes and their relationship with the development of facial paralysis can be drawn in this study. Keywords: head injuries; head trauma; skull fracture; temporal bone fracture; motor vehicles; traffic accidents; facial paralysis
Keywords: ophthalmic artery; vasospasm; iatrogenic; endoscopic sinus surgery; blindness Endoscopic sinus surgery (ESS) is a generally benign, minimally invasive procedure used for management of paranasal sinus diseases, although complications may occur due to proximity of vital structures such as the brain, orbit and great vessels.1 The overall ESS major complication rate is 0.5-1%, of which orbital injury accounts for 0.09% due to direct trauma.2 We report a case of unilateral delayed sudden visual loss without orbital trauma observed intraoperatively or on post[1]operative imaging studies, following a seemingly routine endoscopic sinus surgery for chronic rhinosinusitis. CASE REPORT An 18-year-old lad with no significant medical history underwent ESS for bilateral chronic rhinosinusitis with nasal polyposis. (Figure 1 A-D) The surgery and recovery from anesthesia were uneventful. On the 12th hour post-operatively, the patient noted blurring of vision on the left. Ophthalmologic examination revealed hyperemic conjunctiva (Figure 2A) with visual acuity of counting fingers at 1 foot while fundoscopy showed retinal hemorrhages. Extraocular eye movements (EOM) and intraocular pressure (IOP) were normal (12mmHg). With an assessment of pre-retinal hemorrhages, 500 mg Tranexamic acid was intravenously infused, and a paranasal sinus (PNS) computed tomography (CT) scan and orbital magnetic resonance imaging (MRI) were requested. A few hours later, he complained of left eye pain with increasing intensity and further deterioration of vision. Repeat visual acuity testing showed light perception. There was now a constricted pupil, non-reactive pupillary light reflex, periorbital swelling and progression of conjunctival chemosis. (Figure 2B) The IOP of the left eye had increased to 30mmHg then progressed to 40mmHg with development of total visual loss and a lateral gaze limitation. With an impression of choroidal hemorrhage and retrobulbar hemorrhage, a lateral canthotomy relieved the eye pain. The contrast PNS CT scan with orbital cuts showed that the lamina papyracea was intact with no definite hemorrhagic collections in the intraconal or extraconal spaces of both orbits. (Figure 3A, B) A small hyper density along the lateral inferior margin of the left globe at the intraconal region with slight thickening of the anterior periorbital region represented the lateral canthotomy. The PNS MRI / magnetic resonance angiography (MRA) with orbital cuts showed retinal detachment and periorbital edema in the left eye. (Figure 4) A B-Scan ocular ultrasonogram showed retinal detachment and vitreous opacities. The diagnosis was ocular ischemic syndrome secondary to ophthalmic artery vasospasm, and the patient was given sublingual nitroglycerine and intravenous dexamethasone 8mg every 12 hours for 24 hours, with improvement of periorbital swelling. He was discharged after 12 days with no resolution of the unilateral visual loss.
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