Rationale of treatment in Graves ophthalmopathy

Graves-Basedow ophthalmopathy surgical approaches: Open vs Endoscopic

Graves-Basedow's disease (GBD) is an autoimmune pathology that affects the thyroid and is characterized by the presence of goiter, hyperthyroidism, ophthalmopathy, and dermopathy. Graves-Basedow ophthalmopathy (GBO) is a set of inflammatory and infiltrative alterations of the orbital tissue that affects 40-90% of subjects suffering from GBD. Our study aims to investigate the differences in the clinical outcomes of patients treated with two different techniques: the classic open and the more modern endoscopic. A retrospective clinical study was carried out from the year 2011 until the year 2020 to evaluate the clinical outcomes of two different surgical techniques for the treatment of GBO. Eighteen patients were given surgical indications, 12 males and 6 females aged between 37 and 69 years (average age 48.5 years), for a total of 36 orbits. From the year 2011 to the year 2014, all patients were treated with the open orbital decompression technique; from 2015 onwards, patients were subjected to orbital decompression with the endoscopic transnasal approach. Pre- and postoperative ophthalmometry, reduction of proptosis, and reduction of oculo-orbital index were compared for the two techniques. As evidenced by the statistical analysis carried out on the sample before and after surgical treatment, there is a statistically significant difference between ophthalmometry and the Oculo-Orbital Index (IOO) values; this indicates that surgical orbital decompression with two walls (floor and medial wall) is effective in reducing exophthalmos. The positive result is also confirmed by the reduction of proptosis, measured in millimeters, averaging 1.7 mm. In the analysis of data relating to the two different patient groups, treated respectively with endoscopic orbital decompression (Technique 1) and classical open orbital decompression (Technique 2), the results obtained show that there is no statistically significant difference between the results of the two techniques. Therefore, the choice of surgical approach is at the discretion of the surgeon. It is our opinion that orbital decompression with the endoscopic transnasal technique should be an absolute indication in all patients who have clinical and radiographic signs of involvement of the optic nerve at the orbital apex (crowded apex syndrome) thanks to the ability of this technique to add and decompress the optical channel at the apex. For all other patients with GBO, the endoscopic technique of orbital decompression can be indicated as a first-line surgical approach considering the absence of skin scars and the best aesthetic results.

Changes of Volume Parameters in the Treatment of Graves Ophthalmopathy by Endoscopic Transethmoidal Decompression of the Orbital Inner Wall Combined with Fat Decompression

Objective

To observe the orbital volume changes and the analysis of surgical effect of Graves orbitopathy (GO) after endoscopic medial wall decompression combined with muscle cone fat.

Methods

Twenty-two patients (30 eyes) with Graves orbital disease who visited the Department of Ophthalmology of Ningbo Medical Center from December 2019 to September 2021 were retrospectively collected. All patients were diagnosed as nonorganic active stage before operation, and all of them received endoscopic transethmoidal decompression of the medial orbital wall combined with intramuscular orbital fat decompression due to decreased vision, visual field defect or color vision disorder, and concomitant proptosis. Regular follow-up after operation. The curative effect is judged according to the degree of improvement of visual acuity, color vision, degree of correction of exophthalmos, diplopia, and other complications at 9 months after operation. Orbital CT combined with computer aided measurement software (Mimics 21) was used to measure the changes of orbital volume before and after exophthalmos surgery. The relationship between the value and eyeball regression is analyzed.

Results

Preoperative exophthalmos ranged from 17.4 mm to 27.6 mm, with an average of (22.08 ± 2.86) mm. The postoperative exophthalmos was 14-25 mm, with an average of (19.52 ± 3.10) mm. Among them, 7 eyes (23.3%) had exophthalmos regression less than 1 mm, 6 eyes (20%) had a regression of 1-2 mm, 7 eyes (23.3%) had a regression of 2-3 mm, 5 eyes (16.7%) had a regression of 3-4 mm, and 5 eyes (16.7%) had a regression of 4-5.3 mm. The exophthalmos after operation was significantly lower than that before operation, and the difference was statistically significant (t = 9.909, P < 0.05). The preoperative orbital volume was 18.6 cm3-25.3 cm3 with an average of (22.39 ± 1.91) cm3. The postoperative orbital volume was 19.8 cm3-26.6 cm3, with an average of (23.89 ± 1.90) cm3.The orbital volume change range is 0.1 cm3-3.8 cm3, and the average orbital volume change is (1.51 ± 1.00) cm3. Compared with preoperative orbital volume, the difference was statistically significant (t = -8.074, P < 0.05).

Conclusion

Endoscopic decompression of the medial orbital wall through the ethmoid approach combined with decompression of the orbital fat within the muscle cone can effectively correct the exophthalmos while decompressing the orbital apex, and it is minimally invasive and has no facial scars. It has the advantages of extremely low incidence of postoperative diplopia and eye shift. There is a significant correlation between orbital volume changes and the regression of exophthalmos, which can provide reference for clinical guidance of surgical methods and prediction of surgical results.

Cutting-edge endonasal surgical approaches to thyroid ophthalmopathy

Objective

Thyroid orbitopathy is a poorly understood extrathyroidal manifestation of Graves' disease that can cause disfiguring proptosis and vision loss. Orbital decompression surgery for Graves' orbitopathy (GO) can address both cosmetic and visual sequelae of this autoimmune condition. Endonasal endoscopic orbital decompression provides unmatched visualization and access to inferomedial orbital wall and orbital apex. This review examines the state of the art approaches employed in endonasal endoscopic orbital decompression for GO.

Methods

Review of literature evaluating novel surgical maneuvers for GO.

Results

Studies examining the efficacy of endonasal endoscopic orbital decompression are heterogenous and retrospective in design; however, they reveal this approach to be a safe and effective technique in the management of GO.

Conclusion

Subtle variations in endoscopic techniques significantly affect postsurgical outcomes and can be tailored to the specific clinical indication in GO making endonasal endoscopic decompression the most versatile approach available.

Level of Evidence

NA.

[Transethmoidal decompressive orbitotomy in the patients presenting with endocrine ophthalmopathy at the stage of remission: peculiarities of the surgical intervention and the results of exophthalmos correction]

The objective of the present study was to analyze the original results of the transethmoidal decompressive surgical interventions on the eye orbits of the patients presenting with endocrine ophthalmopathy (EOP) including the evaluation of regress of exophthalmos during the post-operative period. The study included 51 patients with endocrine ophthalmopathy at the stage of remission or pharmacotherapeutic compensation of the underlying process. A total of 80 eye-socket were treated in 29 patients with unilateral exophthalmos and 22 ones having bilateral exophthalmos. All the patients underwent transethmoidal decompression of the orbit (TEDO) with the use of the endonasal approach. The examination before and after surgery included the standard ophthalmological evaluation (such as the external inspection, visiometry, tonometry, computed perimetry, biomicroscopy, and ophthalmoscopy) as well as additional studies including exophthalmometry and orbitometry. The activity of endocrine ophthalmopathy was estimated with use of the clinical activity score scale. The main indication for surgery was cosmetically unacceptable exophthalmos. The results of the analysis of the surgical techniques employed in the present study, anatomical features revealed intra-operatively, methods of post-operative care for the patients, and final outcomes of the treatment taken together have demonstrated the high effectiveness of transethmoidal decompressive surgery. Not a single case of visual acuity deterioration was documented during the follow-up period. Persistent convergent strabismus and post-operative diplopia developed in 18% of the patients. Regress of exophthalmos following transethmoidal decompressive orbitotomy varied from 3.5 to 6.5 mm and averaged 5.1 mm in comparison with the mean initial value of 23.9 mm. In means that transethmoidal decompressive orbitotomy ensured the overall regress of exophthalmos by 18.8 mm (p<0.05). The multispiral CT study revealed the significant reduction of the volume of the eye muscles and the intraorbital adipose tissue. It is worthwhile to emphasize the necessity of the detailed preoperative examination of the patients. Our study included the patients presenting with endocrine ophthalmopathy at the stage of remission or pharmacotherapeutic compensation which gave hope of the favourable outcome of the treatment in terms of the degree of regress of exophthalmos and the improvement of the quality of life. The decision to perform transethmoidal decompressive orbitotomy should be taken based on the results of the multidisciplinary conference including an otorhinolaryngologist, ophthalmologist, and endocrinologist. It is concluded that the results of the present study give evidence of the social significance of transethmoidal decompressive orbitotomy taking into consideration that the patients given such treatment experience dramatic improvement of the quality of life.

[The complications of transethmoidal decompressive orbitotomy associated with endocrine ophthalmopathy]

The objective of the present study was the analysis of the results of transethmoidal decompressive orbitotomy (TEDO) with the resection of the bone matrix of the medial and inferior orbital walls in the patients presenting with endocrine ophthalmopathy (EOP) with the purpose of reduction of the risk of development of this pathological conditions. A total of 51 patient with EOP at the stage of complete remission or pharmacotherapeutic compensation underwent transethmoidal decompressive medial orbitotomy in the ENT Clinic of 1 I.M. Sechenov First Moscow State Medical University during the period from 2006 to 2016. Twenty two of these patients presented with the unilateral process and 29 ones with bilateral exophthalmos. The surgical intervention was performed on the total of 80 eye orbits. The main complaints of the treated patients during the post-operative period included difficulties in nasal breathing (33%), dryness of the nose and crust formation (43%), discharge from the nose and along the posterior pharyngeal wall (15%), nasal bleeding (2%), pain in the forehead and maxillary region (8%), headache (2%). As far as the state of eyes and sight is concerned, 14 (27%) patients reported double vision at the primary gaze position while 6 others (12%) complained of the appearance of diplopia upon a change in the gaze position during the post-operative period. The post-operative endoscopic study revealed synechiae of different localization in the nasal cavity (47%), discharge from the maxillary sinuses (16%) and from the frontal sinus (2%). Eight (16%) patients were found to suffer from maxillary sinusitis, one had acute frontitis, and one sphenoidal sinus mucocelle. These complications were eliminated by pharmacotherapy and additional surgical interventions (2%). Analysis of the results of the study has demonstrated that the above complications were associated with the inadequate post-operative care for the nasal cavity, the excessively large size of the bone window formed during transethmoidal decompressive orbitotomy, resection of the inferior orbital wall, intrusion of the medial rectus muscle of the eye into the wide bone window. We evaluated the possible influence of the orbital soft tissues on the physiological parameters of the functioning of the paranasal sinuses in the post-operative period including blockade of the paranasal drainage pathways by the prolapsed orbital tissues. A few possible approaches to the reduction of the risk of post-operative complications are proposed. The authors emphasize the importance of the further improvement of the surgical treatment of endocrine ophthalmopathy.

The success rate of TED upper eyelid retraction reoperations

Although reoperation rates for upper lid retraction surgery for thyroid eye disease (TED) typically range between 8% and 23%, there is little literature describing the outcomes of these second operations. In this retrospective observational cohort study, all patients that underwent surgery for upper eyelid retraction over a 14-year period at a single institution were included. Cases were included if a second eyelid retraction surgery was performed during the study period. Success of surgery was defined as a marginal reflex distance (MRD1) of 2.5 to 4.5 mm in each eye and less than 1 mm difference in MRD1 between the eyes. Overcorrection and undercorrection were defined as above and below these bounds, respectively. 72 eyes in 49 patients were included in the study. The mean age was 56.6 (±11.5) years. By definition, all patients had at least 1 lid lengthening surgery for upper eyelid retraction, and at least 1 subsequent surgery. For this second surgery, 61 eyes (85%) underwent retraction surgery and 11 eyes (15%) underwent ptosis surgery. After this second operation, 31% were undercorrected and 33% were overcorrected. A third surgery was performed in 19 eyes (25%), 12 had surgery for residual retraction and 7 for ptosis. After the third operation 10% of eyes were under corrected and 11% were over corrected. Four patients underwent a fourth surgery: one for retraction and three for ptosis. Success was noted in 35% after the second surgery and 44% after the third. Surgical success in eyelid retraction surgery increases from a second to a third consecutive surgery, and residual asymmetry was roughly equally distributed between over- and undercorrection.

Orbital Decompression in the Endoscopic Age

Objective

Postoperative diplopia occurs in up to 45% of patients following orbital decompression for exophthalmos associated with Graves’ orbitopathy. We sought to describe outcomes of our balanced orbital decompression strategy that includes the preservation of a modified inferomedial orbital strut (mIOS).

Study Design

Case series with chart review.

Setting

Academic medical center.

Subjects and Methods

A total of 115 consecutive orbital decompressions were performed on 73 patients (42 bilateral) with Graves’ orbitopathy. All patients underwent (1) a balanced decompression technique incorporating an endoscopic medial and external lateral decompression and (2) a mIOS technique with preservation of the anterior half of the inferomedial orbital strut. A periorbital periosteal (orbital) sling was utilized in patients (n = 54) without threatened vision loss, proptosis >28 mm, or periorbital disruption to prevent prolapse of the medial rectus muscle.

Results

Utilization of the mIOS technique with or without a sling did not adversely affect the reduction in proptosis (5.1 mm with sling vs 5.0 mm without sling; P = .85).The incidence of new-onset postoperative diplopia was 17% (n = 6). The sling was not associated with postoperative diplopia (odds ratio = 0.54, 95% confidence interval: 0.08-3.40, P = .51), while it was associated with resolution of preexisting diplopia (odds ratio = 6.67, 95% confidence interval: 1.06-42.06, P = .04). No intraoperative complications occurred, and no patients suffered a decrement in visual acuity.

Conclusion

Balanced orbital decompression utilizing a mIOS in patients with Graves’ orbitopathy provides a safe and effective reduction in proptosis with a low rate of new-onset diplopia as compared with historical values. Utilization of an orbital sling may be beneficial in reducing postoperative diplopia in select patients.

Critical Appraisal on Orbital Decompression for Thyroid Eye Disease: A Systematic Review and Literature Search

INTRODUCTION

Orbital decompression is the indicated procedure for addressing exophthalmos and compressive optic neuropathy in thyroid eye disease. There are an abundance of techniques for removal of orbital bone, fat, or a combination published in the scientific literature. The relative efficacy and complications of these interventions in relation to the specific indications remain as yet undocumented. We performed a systematic review of the current published evidence for the effectiveness of orbital decompression, possible complications, and impact on quality of life.

METHODS

We searched the current databases for medical literature and controlled trials, oculoplastic textbooks, and conference proceedings to identify relevant data up to February 2015. We included randomized controlled trials (RCTs) comparing two or more interventions for orbital decompression.

RESULTS

We identified only two eligible RCTs for inclusion in the review. As a result of the significant variability between studies on decompression, i.e., methodology and outcome measures, we did not perform a meta-analysis. One study suggests that the transantral approach and endonasal technique had similar effects in reducing exophthalmos but the latter is safer. The second study provides evidence that intravenous steroids may be superior to primary surgical decompression in the management of compressive optic neuropathy requiring less secondary surgical procedures.

CONCLUSION

Most of the published literature on orbital decompression consists of retrospective, uncontrolled trials. There is evidence from those studies that removal of the medial and lateral wall (balanced) and the deep lateral wall decompression, with or without fat removal, may be the most effective surgical methods with only few complications. There is a clear unmet need for controlled trials evaluating the different techniques for orbital decompression. Ideally, future studies should address the effectiveness, possible complications, quality of life, and cost of each intervention.

Aesthetic refinements in the treatment of graves ophthalmopathy

BACKGROUND

Graves ophthalmopathy is a chronic, multisystem, autoimmune disorder characterized by increased volume of intraorbital fat and hypertrophic extraocular muscles. Proptosis, impaired ocular motility, diplopia, lid retraction, and impaired visual acuity are treated with orbit decompression and fat reduction. The authors present the addition of skeletal augmentation to further improve periorbital aesthetics.

METHODS

Through a transconjunctival with lateral canthotomy incision, a balanced orbital decompression was executed, removing medial and lateral walls and medial floor. Intraorbital fat was excised. All patients underwent placement of porous polyethylene infraorbital rim implants and midface soft-tissue elevation, increasing inferior orbital rim projection and improving the globe-cheek relationship. From 2009 to 2012, 13 patients (11 female and two male; 26 eyes) with Graves ophthalmopathy underwent surgery at two institutions. Outcomes were evaluated for improvements of proptosis, diplopia, dry eye symptoms, and cosmetic satisfaction.

RESULTS

Postoperative follow-up ranged from 0.5 to 3 years (median, 1.5 years). The mean improvement on Hertel exophthalmometry was 5.4 mm. Diplopia resolved in three patients (23 percent). No patients had worsening diplopia, and 12 (92 percent) discontinued use of eye lubricants. All patients had cosmetic satisfaction. One patient suffered temporary inferior orbital nerve paresthesia. There were no infections, hematomas, or ocular complications.

CONCLUSIONS

Skeletal augmentation is a useful adjunct to orbital decompression and fat excision for treating Graves ophthalmopathy. Balanced orbital decompression with infraorbital rim implants is reliable, effective, and safe, with good, lasting results. Resolution of ocular symptoms is improved, as are the patient's personal well-being and social life, with a high-benefit-to-low-risk.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

The lateral canthus web and its surgical management

BACKGROUND

The lateral canthus is structurally important for normal eyelid contour and for reconstruction of the periorbital region. An abnormal lateral canthus contour has significant implications regarding lateral visual field and affects periocular cosmesis.

PURPOSES

To describe of a series of patients with dehiscence of the lateral canthus and the surgical approach of treatment.

METHODS

Four cases with primary lateral canthal web that were seen by the same surgeon between 2005 and 2012. The average age was 69.7 years, (range 52-81 years), one male and three females. Primary complaints were lateral visual field constriction, tired eyes, and abnormal eyelids. In 3 cases, reconstruction of the lateral canthus was performed using periosteal flaps.

CONCLUSIONS

Reconstruction of the lateral canthus with periosteal flaps yielded a satisfactory result in cases of lateral canthus web. Additional cases would enhance our understanding of this pathology.

Hyperthyroid vs hypothyroid eye disease: the same severity and activity

PURPOSE

To compare demographics, severity, and activity of thyroid eye disease (TED) in patients with hyperthyroidism (Hr-TED) vs primary hypothyroidism (Ho-TED).

PATIENTS AND METHODS

In a cross-sectional study, demographics, complete eye examination, severity score (NOSPECS, total hundred eye score), clinical activity score, and Rundle grading were recorded for patients with TED and different thyroid disorders referred from an endocrinology clinic from 2003 to 2006.

RESULTS

TED was clinically found in 303 patients (303/851, 35.6%). The majority of them (280/303, 92.4%) had Graves' hyperthyroidism and 23 (23/303, 7.5%) had primary hypothyroidism. Mean age, gender, mean severity score, mean activity score, Rundle grade, unilateral presentation of TED, smoking habit, mean duration of eye disease, and mean interval time of thyroid to TED were not significantly different between the two groups (0.06<P<0.9). Mean duration of thyroid disease was significantly (P=0.02) longer in the Hr-TED group (49.6 months) than in the Ho-TED group (22.7 months). Most of the patients in both groups (63.2% of Hr-TED and 73.9% of Ho-TED) developed the eye disease within 18 months before or after the thyroid disease.

CONCLUSION

The same demographics, clinical characteristics, and severity and activity scores for Hr-TED and Ho-TED imply that both groups present the same category of eye disease.

Thyroid eye disease

Thyroid eye disease (TED) is the most common cause of proptosis in adults, and should always be a consideration in patients with unexplained diplopia, pain, or optic nerve dysfunction. At least 80% of TED is associated with Graves disease (GD), and at least 50% of patients with GD develop clinically evident symptomatic TED. The most confusing patients for doctors of all subspecialties are the patients with eye symptoms and signs that precede serum evidence of a thyroid imbalance. Management of TED may include immunosuppressive medications, radiation, or surgery. Although the prognosis for optic nerve function is excellent, the restrictive dysmotility can result in permanent disability. Orbit and eyelid reconstruction are reserved for stable, inactive patients and are the final steps in minimizing facial alterations and enhancing the patient's daily functioning.

The value of the maxillo-malar osteotomy in the treatment of Crouzon syndrome with exorbitism

Premature fusion of the cranial sutures along with midface hypoplasia, shallow orbits, and ocular proptosis are the principal features of Crouzon syndrome. Treatment varies according to the variable expressivity of the disease and usually begins during a child's first year with fronto-orbital advancement with cranial decompression. Subsequent development of midfacial hypoplasia needs correction. Procedures for this purpose include the Le Fort III osteotomy or its segmental variants, monobloc frontofacial advancement, or bipartition osteotomy. Adult Crouzon often presents with marked midface hypoplasia and exorbitism. We report an adult-diagnosed Crouzon syndrome case with typical facial features and exorbitism corrected by orbital decompression and zygomaticomaxillary advancement.

The influence of previous orbital irradiation on the outcome of rehabilitative decompression surgery in graves orbitopathy

PURPOSE

To investigate whether orbital irradiation influences the outcome of decompression surgery in Graves orbitopathy.

DESIGN

Retrospective, comparative case series.

METHODS

The medical records of all the patients with Graves orbitopathy treated with a three-wall orbital decompression through a coronal approach at our institution between January 1, 1990 and December 31, 2000 were reviewed. Only patients who underwent bilateral surgery for aesthetic rehabilitation, without preoperative diplopia, and who, in the active phase of the disease, had received orbital radiotherapy alone (20 Grays (Gy) in 10 daily fractions of two Gy over a period of two weeks; group R), systemic glucocorticoids alone (daily administration for more than three months independently from the dosage; group G), or both radiotherapy and glucocorticoids (group RG) were selected. Groups were compared for demographics, smoking habits, preoperative characteristics, and surgical outcome (mean reduction of exophthalmos, reduction of lid retraction, persistence of periorbital swelling requiring cosmetic eyelid surgery, onset of diplopia within 20 degrees of the central position of gaze, and variations in the peripheral field of diplopia).

RESULTS

Sixty-one of 376 patients were selected for this study. There were no differences between group R (n=29), group G (n=15), and group RG (n=17) with respect to demographics or predecompression characteristics, whereas the number of smokers was significantly greater in group RG (P=.019). We could not find differences in surgical outcome by comparing the three groups.

CONCLUSIONS

The total radiation dose, fraction size, and irradiated volume commonly used to treat active Graves orbitopathy do not adversely interfere with the outcome of rehabilitative decompression surgery.

Efficacy of corticosteroids and external beam radiation in the management of moderate to severe thyroid eye disease

Thyroid Eye Disease (TED, Graves ophthalmopathy, thyroid ophthalmopathy) is the most common cause of orbital inflammation and proptosis in adults. There is no agreement on its management although corticosteroids and external beam orbital radiation (XRT) have traditionally been believed to provide benefit in active inflammation. Our review of the published literature in English disclosed an overall corticosteroid-mediated treatment response of 66.9% in a total of 834 treated patients who had moderate or severe TED. Intravenous corticosteroids used in repeated weekly pulses were more effective (overall favorable response = 74.6%, n = 177) and had fewer side effects than daily oral corticosteroids (overall favorable response = 55.5%, n = 265). A combination of corticosteroid and radiation therapy seemed to be more effective than corticosteroids alone. Our conclusions are tempered by a notable lack of standardization within and between study designs, treatment protocols, and outcome measures. Accordingly, the North American Neuro-Ophthalmology Society (NANOS), American Society of Ophthalmic Plastic and Reconstructive Surgery (ASOPRS) and the Orbital Society, in conjunction with Neuro-Ophthalmology Research and Development Consortium (NORDIC), will investigate the design and funding of a multi-center controlled trial.

Transpalpebral Decompression of Endocrine Ophthalmopathy by Intraorbital Fat Removal (Olivari Technique): Experience and Progression after More than 3000 Operations over 20 Years

BACKGROUND

Graves' ophthalmopathy is a chronic, multisystem disorder characterized by increased intraorbital fat tissue and hypertrophic extraocular muscles caused by an autoimmune process. Graves' ophthalmopathy represents the most frequent extrathyroidal manifestation of Graves' disease. Clinical findings are impaired ocular motility, diplopia, lid retraction, and impaired visual acuity up to optic neuropathy, with menacing blindness.

METHODS

Transpalpebral decompression by intraorbital fat removal was first described by Olivari in 1988. From 1984 to 2004, a consecutive series of 1635 patients (3210 eyes) with Graves' ophthalmopathy underwent this operation at the authors' institution. The medical records of 1374 patients (84 percent) could be evaluated retrospectively.

RESULTS

Postoperatively, the majority of patients showed significant improvements of major symptoms such as ocular protrusion, diplopia, decreased visual acuity, swelling of the eyelids, retrobulbar pressure, and headache. In addition, complications-most of them temporary and reversible-were rare. Because the osseous orbita is not touched, no complications, such as penetration of the dura, infection of the sinus maxillaris, meningitis, irritation of the infraorbital nerve, or obstruction of the lacrimal system, were observed. However, the high number of additional eyelid corrections (average, 2.5 individual corrections) following the decompression indicated the complexity of surgical treatment in endocrine orbitopathy.

CONCLUSION

Transpalpebral decompression has proved to be reliable, effective, and safe, with good, lasting results leading to an improvement not only in visual function but also in the patient's personal well-being and social life, with a high-benefit-to-low-risk ratio.

Transconjunctival Müller muscle recession with levator disinsertion for correction of eyelid retraction associated with thyroid-related orbitopathy

PURPOSE

To evaluate the efficacy of transconjunctival Müller muscle recession and graded levator disinsertion for eyelid retraction in patients with thyroid-related orbitopathy (TRO).

DESIGN

Retrospective consecutive case series.

METHODS

Medical record review of 78 TRO patients (107 eyelids) who underwent surgery for upper eyelid retraction in a 5-year period was performed. Main outcome measures were anatomic and functional success, minimal reflex distance (MRD), lagophthalmos, eyelid asymmetry, and patient discomfort.

RESULTS

One hundred seven eyelid retraction surgeries were performed on 78 TRO patients (63 women, mean age 49 years); mean follow-up time was 16.7 months. Upper eyelid position, lagophthalmos, exposure keratopathy, and patients' discomfort markedly improved after surgery (P < .001). Marginal reflex distance (MRD1) decreased an average of 2.6 mm from 6 mm pre-operatively to 3.4 mm post-operatively (P < .001); lagophthalmos decreased an average of 0.6 mm from 1.3 mm pre-operatively to 0.4 mm post-operatively (P = .006) Failure rate was 8.4%, most improved with a second surgery. Overcorrection was noticed in three cases (2.8%). Eyelid asymmetry improved from a mean of 1.0 mm pre-operatively to 0.4 mm post-operatively (P = .001); more than 80% of patients showed eyelid asymmetry of 1 mm or less.

CONCLUSION

Transconjunctival Müller muscle and levator recession is safe and effective in correction of mild, moderate, or severe eyelid retraction in TRO patients. The failure rate is less than 10% and may be addressed by a second surgery.

[Grave's ophthalmopathy: therapeutic strategy. Review of 30 patients]

BACKGROUND

Graves' ophthalmopathy is the primary etiology for exophthalmos in adults. It is a complex orbital disease whose pathophysiology remains controversial. Since its initial description more than 150 years ago, its heterogeneous clinical manifestations and poorly understood links with thyroid pathology remain unresolved issues. Disease activity is the main determinant for the management of Graves' ophthalmopathy, but treatments are often symptomatic, aiming at decreasing orbital inflammation.

MATERIAL AND METHODS

We report a retrospective analysis of 30 patients diagnosed with Graves' ophthalmopathy followed in our department between 1991 and 2002. Following a phase of medical management of their disease, all patients underwent surgical orbital decompression.

RESULTS

Medical and surgical care provided as well as results are presented with a mean follow-up of 23 months.

DISCUSSION

Based on our clinical experience, new concepts in the field of Graves' ophthalmopathy are discussed. Disease activity, evaluated through various means, appears to be the primary guide for therapeutic management. Moreover, the importance of a multidisciplinary approach is highlighted, in order to improve the management of this difficult disorder.

Thyroid-associated orbitopathy: a clinicopathologic and therapeutic review

PURPOSE OF REVIEW

To review the literature related to thyroid-associated orbitopathy and to emphasize recent developments in its pathophysiology, diagnosis, and therapy. Current therapeutic trends and controversies are discussed.

RECENT FINDINGS

Expression of thyroid stimulating hormone receptor is highest in the fat and connective tissue of patients with thyroid-associated orbitopathy, where fibroblasts have the potential for adipogenesis. Electrophysiology can now detect subclinical optic neuropathy, and somatostatin-receptor scintigraphy can help justify immunomodulation. Other than steroids, radiotherapy can control inflammation, but its use is controversial. Current trends in orbital decompression are to camouflage incisions and to limit strabismus with balanced decompression, deep lateral wall techniques, fat removal, and onlay implants. Proptosis reductions of 0.9 to 12.5mm are possible by the use of various algorithms. Before or after decompression, botulinum toxin can correct strabismus, intraocular pressure elevation, and retraction. The latter is now also treated with full-thickness blepharotomy.

SUMMARY

As knowledge of the pathophysiology of thyroid-associated orbitopathy grows, there is a slow movement from nonspecific and invasive measures to more directed treatments causing less morbidity.

Graves' exophthalmos: Volumetric assessment of orbital expansion

INTRODUCTION

Graves' ophthalmopathy is characterized by an increase in the volume of orbital soft tissue contents and an associated increase in intraorbital pressure. Surgical expansion of bony orbital volume is therefore an effective method of treating moderate to severe exophthalmos. Numerous correlations between specific decompression procedures and reduction of proptosis have been made. The main emphasis of the majority of these studies, however, appears to be of a qualitative nature rather than quantitative.

OBJECTIVES

To quantitatively examine the consequences of surgical orbital decompression in the treatment of severe Graves' exophthalmos, with respect to changes in ocular globe projection and orbital soft tissue and bony volume.

MATERIAL AND METHODS

A series of three patients (five orbits) with severe exophthalmos were evaluated. All patients were operated on by a single surgeon using a standard technique of orbitozygmatic osteotomy in conjunction with three-wall orbital decompression and release of periorbita. Data obtained from standardized preoperative and three-month postoperative computed tomography scans were transferred to an offline computer workstation. Scalar and volumetric parameters were quantitatively analyzed to determine changes in globe projection in relation to intraorbital volume differences.

RESULTS

Following surgery, mean globe retrodisplacement from the lateral orbital rim and from the optic foramen were 6.7 mm and 3.3 mm, respectively. Osteotomy and decompression were effective in producing an 18.6% increase in bony orbital volume. However, the volume of intraorbital soft tissues increased substantially following surgery, with a 23.4% increase in orbital fat volume and a 12.2% increase in neurovascular tissue volume.

CONCLUSIONS

The degree of globe retrodisplacement achieved by surgical expansion of the bony orbital cavity in patients with Graves' ophthalmopathy may be less than anticipated, due to a post-operative increase in the intraorbital soft tissue volumes.