Axial Globe Position Measurement: A Prospective Multicenter Study by the International Thyroid Eye Disease Society.

PURPOSE: Identify a reproducible measure of axial globe position (AGP) for multicenter studies on patients with thyroid eye disease (TED). METHODS: This is a prospective, international, multicenter, observational study in which 3 types of AGP evaluation were examined: radiologic, clinical, and photographic. In this study, CT was the modality to which all other methods were compared. CT AGP was measured from an orthogonal line between the anterior lateral orbital rims to the cornea. All CT measurements were made at a single institution by 3 individual clinicians. Clinical evaluation was performed with exophthalmometry. Three clinicians from each clinical site assessed AGP with 3 different exophthalmometers and horizontal palpebral width using a ruler. Each physician made 3 separate measurements with each type of exophthalmometer not in succession. All photographic measurements were made at a single institution. AGP was measured from lateral photographs in which a standard marker was placed at the anterior lateral orbital rim. Horizontal and vertical palpebral fissure were measured from frontal photographs. Three trained readers measured 3 separate times not in succession. Exophthalmometry and photography method validity was assessed by agreement with CT (mean differences calculation, intraclass correlation coefficients [ICCs], Bland-Altman figures). Correlation between palpebral fissure and CT AGP was assessed with Pearson correlation. Intraclinician and interclinician reliability was evaluated using ICCs. RESULTS: Sixty-eight patients from 7 centers participated. CT mean AGP was 21.37 mm (15.96-28.90 mm) right and 21.22 mm (15.87-28.70 mm) left (ICC 0.996 and 0.995). Exophthalmometry AGP fell between 18 mm and 25 mm. Intraclinician agreement across exophthalmometers was ideal (ICC 0.948-0.983). Agreement between clinicians was greater than 0.85 for all upright exophthalmometry measurements. Photographic mean AGP was 20.47 mm (10.92-30.88 mm) right and 20.30 mm (8.61-28.72 mm) left. Intrareader and interreader agreement was ideal (ICC 0.991-0.989). All exophthalmometers' mean differences from CT ranged between -0.06 mm (±1.36 mm) and 0.54 mm (±1.61 mm); 95% confidence interval fell within 1 mm. Magnitude of AGP did not affect exophthalmometry validity. Oculus best estimated CT AGP but differences from other exophthalmometers were not clinically meaningful in upright measurements. Photographic AGP (right ICC = 0.575, left ICC = 0.355) and palpebral fissure do not agree with CT. CONCLUSIONS: Upright clinical exophthalmometry accurately estimates CT AGP in TED. AGP measurement was reliably reproduced by the same clinician and between clinicians at multiple institutions using the protocol in this study. These findings allow reliable measurement of AGP that will be of considerable value in future outcome studies.

Transcranial orbital decompression for progressive compressive optic neuropathy after 3-wall decompression in severe graves' orbitopathy.

PURPOSE: To determine surgical outcomes after transcranial decompression of the superior orbit in patients with progressive compressive optic neuropathy (CON) secondary to Graves' orbitopathy (GO) who had previously been treated with 3-wall decompression. METHODS: Approval from the West Virginia University Institution Review Board was obtained. A retrospective review of 4 patients with GO who received bilateral transcranial decompression of the orbits for progressive compressive optic neuropathy after bilateral maximal extracranial 3-wall decompression was performed. The patients were treated by the Multidisciplinary Orbit and Skull Base Services at West Virginia University and the University of Michigan. RESULTS: Bilateral transcranial decompression of the orbit for GO was performed on 8 orbits in 4 patients. All 8 orbits had radiographic evidence of compression of the orbital apex, and all patients had been treated with steroids, orbital radiation, and bilateral 3-wall decompression. Preoperative vision ranged from 20/25 to 20/100, which improved to 20/25 or better in all eyes. The visual field mean deviation improved from a mean of -13.05 to -1.67 dB. Hertel measurements improved from a mean of 19.25 to 15.25 mm. Extraocular motility was essentially unchanged. Two patients were noted to have asymptomatic ocular pulsations. There were no other complications, and all patients remained stable during a follow-up period of 5 years (range 2-8 years). CONCLUSIONS: Transcranial decompression is an effective and safe method of salvaging vision when standard treatments fail. This is only the second report of transcranial decompression for refractory compressive optic neuropathy after decompression from a standard approach.

Calculated computed tomography volumes of lacrimal glands and comparison to clinical findings in patients with thyroid eye disease.

PURPOSE: To describe the range of lacrimal gland volumes on CT in Caucasian patients with thyroid eye disease (TED) and to correlate with clinical findings. METHODS: With institutional review board approval, 125 orbital CT scans for TED were reviewed. OsiriX software was used to calculate the volume of the lacrimal gland. Comparison of the volumes was made with previously published results of the normal population. Patient race, gender, smoking status, diplopia, tearing, exophthalmometry, superficial punctate keratitis (SPK), lagophthalmos, restriction in motility, and VISA score were collected. RESULTS: The mean volume of the lacrimal gland in patients with TED was 0.890 cm in right orbits (standard deviation [SD] 0.348), 0.851 cm in left orbits (SD 0.350), with no significant difference between right and left (p = 0.311). The mean volume was 0.811 cm in right male orbits (SD 0.386) and 0.911 cm in right female orbits (SD 0.335), with no significant difference between men and women (p = 0.774). These findings were confirmed in an analysis of left orbits. The volume of right and left orbits correlated well (r = 0.777, p < 0.0001). The lacrimal gland volume in patients with TED was greater compared with the normal population using a 2-sample t test (p < 0.0001). Exophthalmometry (right: r = 0.225, p = 0.0115; left: r = 0.267, p = 0.0026) and subjective tearing (right: r = 0.226, p = 0.0138; left: r = 0.197, p = 0.0322) correlated with lacrimal gland volume. CONCLUSIONS: This study is the first to report the volume of the lacrimal gland calculated on CT scan for patients with TED. The lacrimal gland is larger in patients with TED and correlates with subjective tearing and exophthalmometry.

Bilateral diffuse orbital myositis in a patient with relapsing ulcerative colitis.

Ophthalmic manifestations of inflammatory bowel disease are common, but orbital inflammatory disease is rare with most cases associated with Crohn disease. We describe the first case of bilateral, diffuse, orbital myositis associated with ulcerative colitis in a patient taking infliximab. Within 72 hours of intravenous methylprednisolone treatment, the orbital inflammation dramatically improved. After 8 weeks of prednisone, it completely resolved and has remained quiet for 13 months. This is only the third report of ulcerative colitis-associated orbital inflammatory disease.

CT dimensions of the lacrimal gland in Graves orbitopathy.

PURPOSE: To determine if lacrimal dimensions are enlarged in Graves orbitopathy on CT and to correlate size with clinical data. METHODS: One hundred and twenty-eight adult Caucasian patients with Graves orbitopathy who had CT at initial presentation to the authors' clinic were identified. The lacrimal gland width and length were measured on axial and coronal scans using the OsiriX software according to an established protocol. Comparison of dimensions with a published normal population was made. Clinical data near the time of CT were collected, including gender, age, smoking, subjective diplopia, exophthalmometry, intraocular pressure, corneal staining, and the VISA activity score for correlation with gland size. RESULTS: The lacrimal glands in Graves orbitopathy were significantly larger in all measured dimensions (p = 0.0001 for each dimension). There were no differences between the genders (p values ranged between 0.3855 and 0.8699). Exophthalmometry showed weak correlation with gland size in all dimensions (p value range, 0.0058 to <0.0001; r value range, -0.2616 to 0.4181). Smoking correlated significantly with gland enlargement in right coronal and axial width dimensions (p = 0.0150 and p = 0.0232, respectively). VISA inflammatory score was borderline correlated with right axial width. Lacrimal gland size did not correlate with diplopia, intraocular pressure, or corneal staining. CONCLUSIONS: The lacrimal gland is statistically significantly enlarged in Graves orbitopathy. Only weak correlation was found between gland enlargement and smoking, proptosis, and inflammatory activity. Future research will address the causal changes of enlargement and their effect on lacrimal function.

Delayed Eikenella corrodens orbital infection after fracture repair.

Orbital cellulitis and abscess after fracture repair are rare. Ophthalmic infection with Eikenella species is even more unusual, but can be severe. We report a case of Eikenella corrodens infection in a 28-year-old man who underwent zygomaticomaxillary and orbital floor blowout fracture surgery 4 years before presentation. Eikenella species are often resistant to frequently used empiric antibiotics, and because of specific growth conditions, easily missed on standard cultures. Appropriate efforts should be made to identify and treat E. corrodens in atypical orbital and periocular infections.

Computed tomography dimensions of the lacrimal gland in normal Caucasian orbits.

INTRODUCTION: CT is frequently used to assess the lacrimal gland, yet no published reports exist of normal dimensions using this modality. We retrospectively evaluated CT data from normal orbits and measured the lacrimal gland dimensions. METHODS: Two-hundred ninety-three consecutive orbital CT scans (586 orbits) of 282 patients were identified. Caucasian patients aged 18 years and older without known orbital disease were included. Traumatized orbits were excluded. All repeated scans were excluded. Length and width of the lacrimal gland were measured in axial and coronal sections with GE Centricity Software. The primary outcome was a descriptive analysis of the distribution of dimensions in normal orbits. A random subset of patient scans was measured independently by observers at different levels of training, and intraclass correlation coefficients (ICCs) were established. RESULTS: Three hundred orbits (150 right orbits and 150 left orbits) of 282 patients were included. Normal distributions occurred with axial and coronal length measurements. Mean (10th and 90th percentiles) lacrimal gland axial length in right orbits was 14.7 mm (10.9 mm and 18.3 mm) and 14.5 mm in left orbits (10.3 mm and 18.3 mm). Coronal length averaged 17.7 mm in right eyes (13.9 mm and 21.8 mm) and 16.9 mm in left eyes (12.8 mm and 20.8 mm). Axial and coronal width showed non-normal distributions. No statistically significant difference in dimensions was found between genders, and a significant inverse linear relation occurred between gland size and age. Agreement was significant among the observers (ICC >0.7). CONCLUSION: This study presents a normal range of Caucasian lacrimal gland dimensions seen on CT. Lacrimal gland size decreases with age, and no gender difference exists. This range can aid in differentiating diseased and nondiseased lacrimal glands, especially when correlated with physical examination. This may be useful in clinical trials that involve lacrimal gland size.

Amniotic membrane in medial canthal reconstruction.

PURPOSE: To describe the use of amniotic membrane for reconstruction of large medial canthal defects. METHODS: Four cases of medial canthus resection of cutaneous malignancies were reconstructed using amniotic membrane to cover exposed sclera and orbital fat, combined with other reconstructive techniques including titanium plating and myocutaneous flaps. RESULTS: Complete epithelialization of the scleral defect covered with amniotic membrane was seen within 6 weeks in all 4 patients. CONCLUSIONS: Amniotic membrane is useful for complex reconstructions of the medial canthus, and can be combined with other techniques such as myocutaneous flaps. This technique results in good functional and cosmetic results.

Striated muscle hamartoma of the eyelid in an adult woman.

A 57-year-old woman presented with a recurrent lower eyelid growth that was found to be a striated muscle hamartoma on surgical biopsy. This is a rare entity in adults with no history of congenital abnormality. Several other rare, benign lesions may be clinically similar and should be considered in the differential diagnosis of an eyelid lesion containing striated muscle.