Usefulness of colour Doppler flow imaging in the management of lacrimal gland lesions.

OBJECTIVE: To assess the role of colour Doppler flow imaging (CDFI) in the diagnosis and management of lacrimal fossa lesions. METHODS: Institutional ethical committee approval was obtained. Fifty-one patients with 62 lacrimal fossa lesions were retrospectively included from 2003-2015. All patients underwent conventional ultrasonography and CDFI, with a qualitative and quantitative analysis of the vascularization. All patients had lacrimal gland surgery. Definitive diagnosis was based on pathological examination. RESULTS: The study included 47 non-epithelial lesions (NEL) and 15 epithelial lesions (EL), with 24 (39 %) malignant lesions and 38 (61 %) benign lesions. NEL were significantly more likely to present with septa (p < 0.001), hypoechogenicity (p < 0.001), high vascular intensity (p < 0.001), both central and peripheral vascularization (p < 0.001), tree-shape vascularization (p < 0.05) and a low resistance index (RI) (p < 0.0001). EL were significantly more likely to present with the presence of cysts (p < 0.001), and a higher RI. Receiver operating characteristic curves identified a RI value of 0.72 as the best cut-off to differentiate NEL from EL, with a sensitivity and specificity of 100 %. CONCLUSION: CDFI is a valuable tool in the differential diagnosis of lacrimal fossa lesions. Resistance index measurement enables substantial distinction between EL and NEL, thus providing crucial data for surgical management. KEY POINTS: • CDFI is a valuable tool in lacrimal fossa lesions. • Resistance Index measurement enables substantial distinction between epithelial and non-epithelial lesions. • Management of patients becomes more appropriate.

[Management of orbital cavernous hemangioma - evaluation of surgical approaches: report of 43 cases]. / Prise en charge des hémangiomes caverneux orbitaires - évaluation des voies d'abord chirurgicales: à propos de 43 cas.

Cavernous hemangioma is the most frequent benign orbital tumor in adults. The purpose of this study was to examine its clinical features, to define surgical indications, and to determine the roles of the various surgical approaches praticed in ophthalmology: transconjunctival (increasingly utilized), anterior transcutaneous, and lateral orbitotomy. The records of all patients treated for orbital cavernous hemangioma (OCH) since 2004 at the Fondation Rothschild (Paris, France) were retrospectively reviewed. Forty-three patients were treated for orbital cavernous hemangioma. Fifty-eight percent were women, mean age 50.2; 79 % of the tumors were intraconal. Among those patients, 36 underwent surgical removal, 5 were followed periodically, and 2 were lost to follow-up. The main surgical indications were: optic nerve compression (26 patients), proptosis (24 patients) and diplopia (3 patients). Transconjunctival, anterior transcutaneous and Kronlein approaches were used in 16, 12 and 4 patients respectively. Four patients had intrapalpebral hemangiomas easily reached transcutaneously. Two patients demonstrated transient partial 3rd nerve palsy (one with the lateral orbitotomy approach and one with the transconjunctival approach), one patient with the lateral orbitotomy approach developed a palsy of the superior branch of the 3rd nerve, and one patient with the transcutaneous anterior approach developed mydriasis. Surgical excision of OCH's is required in the presence of clinical complications. The transconjunctival approach is a safe technique which can lead to complete resection of the tumor in most cases.

[How to deal with orbital syndrome: diagnostic approach]. / Conduite à tenir devant un syndrome orbitaire : approche diagnostique.

Evaluation of a patient with orbital disease needs a multidisciplinary approach. Clinical examination should seek to glean information regarding pathophysiologic effect and location and to evaluate consequences of this disease on cosmetic, vision and ocular motility. Procedures of imaging are based on the implied complementary exams that should be done according to the suspected clinical location and characters help to characterize the underlying process. Imaging can define the location, size, limits and relationship of the disease to other tissues and especially to the vascular system. It may be completed by blood test. The final diagnosis is based on several arguments and can appeal for a diagnostic biopsy in the most difficult cases.

[Evaluation of reconstructive techniques after orbital exenteration in 56 cases]. / Évaluation des techniques de reconstruction après exentération orbitaire. À propos de 56 cas.

PURPOSE: To describe the management of orbital exenterations and the surgical techniques for the reconstruction of orbital exenteration cavities. PATIENTS AND METHODS: This retrospective study includes 56 patients who underwent orbital exenteration between 2000 and 2009. Patients' age at the time of exenteration, diagnoses, complications and reconstructive techniques were studied. RESULTS: Fifty-six patients - 31 male and 25 female patients - who underwent orbital exenteration between 2000 to 2009 were included in the study. The mean age was 62.5 years at the time of exenteration. Average follow-up was 23 months. The principal diagnoses were basal cell carcinoma of the eyelids (25%) and conjunctival melanoma (20%). For orbital reconstruction, 18 patients (32%) had a muscle flap, and 24 patients (43%) underwent secondary reconstruction by bone-anchored implants after spontaneous epithelialisation of the orbit. Approximately 50% of the patients received postoperative radiation therapy. DISCUSSION: Surgical reconstruction using muscle flaps may mask recurrent tumor. Epithelialisation and bone-anchored implants supporting the prosthesis allow for recurrent cancer surveillance while providing better stabilization of the prosthesis. Radiation therapy seems to render the orbit more fragile and thus less stable for implants. CONCLUSION: Orbital exenteration is a mutilating technique. Rehabilitation techniques have been improved, in particular the bone-anchored implants which allow adaptation of the prosthesis with satisfactory cosmetic results.

[Management of orbital inflammation in internal medicine: a retrospective case series of 29 patients]. / Prise en charge de l'inflammation orbitaire en médecine interne : à propos d'une série de 29 patients consécutifs.

PURPOSE: To describe a case series of patients investigated in internal medicine for an inflammation of the orbit and to clarify the clinical and pathological features of patients with idiopathic orbital inflammatory syndrome (IOIS). PATIENTS AND METHODS: Forty patients were consecutively referred by a specialized center where an orbital biopsy was performed in case of accessible lesion. Eleven patients were excluded because of missing data or diagnosis of lymphomas, periorbital xanthogranulomas, or Graves' disease. Patients with systemic disease (SD) or auto-immune disorder (AID) that validated the international criteria, or those having an IOIS in the absence of local or systemic etiology, were included. The clinicopathologic and immunologic characteristics of IOIS patients, their treatment and their evolutionary profiles are reported according to the histological types described by Mombaerts. RESULTS: Of the 29 patients enrolled, eight had a dacryoadenitis revealing a SD/AID, mainly a necrotizing vasculitis, seven patients had a presumed IOIS and 14 an IOIS histologically documented. The presentation of IOIS was dominated by a diffuse involvement of the orbit. Corticosteroids were administered alone or with an immunosuppressant in 57 and 24% of IOIS patients, respectively. The incidence of relapse/resistance was higher than that of remission, particularly in case of presumed IOIS or in its classical form. All four patients with a stage III-IV of Chisholm were relapsing or resistant. CONCLUSION: A dacryoadenitis may reveal some types of SD/AID. Unlike the severe sialadenitis, the form of sclerosing IOIS may not be a factor associated with relapse or resistance.

Combined endovascular and surgical approach for the treatment of palpebral arteriovenous malformations: experience of a single center.

BACKGROUND AND PURPOSE: Palpebral AVMs (pAVMs) are rare vascular lesions for which the treatment is challenging. Our aim was to present the technical aspects of the presurgical treatment by interventional neuroradiology of pAVMs and to report the clinical and angiographic results of combined (interventional neuroradiology/surgery) treatment of these malformations. MATERIALS AND METHODS: Nine patients (5 females, 4 males) with a mean age of 22 years (range, 12-35 years) were treated in our department from December 1992 to April 2007 for superficial pAVMs. Seven patients presented with isolated pAVMs, while 2 had hemifacial AVMs. Ten TAE procedures, by using a liquid embolic agent (glue or Onyx) or microparticles, were performed in 7 patients. Six patients underwent absolute alcohol, glue, or sclerotic agent injection by direct puncture in 8 procedures. Clinical and angiographic follow-up were performed with a mean delay of, respectively, 6.3 and 5 years. RESULTS: Three patients had a single EVT. Iterative procedures were performed in 5 patients. In 1 patient, EVT was not performed because of the risk of occlusion of the central retinal artery. No complication occurred except 1 case of transient palpebral hematoma. No visual acuity loss related to an endovascular procedure was reported. Exclusion of the AVMs at the end of the procedure was >75% in all cases and total in 3/8 cases. All the patients except 2 underwent at least 1 surgical procedure after the embolization. Good clinical regression of the mass was obtained in all patients at long-term follow-up. CONCLUSIONS: Combined endovascular and surgical treatment of pAVMs is an effective and safe technique with good clinical results at long-term follow-up.

[Intraorbital pressure measured before, during, and after surgical decompression in Graves' orbitopathy]. / Mesure de la pression intraorbitaire avant, pendant et après décompression orbitaire osseuse dans l'orbitopathie dysthyroïdienne.

PURPOSE: In Graves' orbitopathy, the volumetric increase of the oculomotor muscles and orbital fat leads to exophthalmia and a rise in orbital pressure. This rise in pressure may be implicated in the appearance of a compressive optic neuropathy. To investigate this increase in pressure and its variations accompanying surgical decompression, systematic measurements were taken before, during, and after every case of orbital decompression in Graves' disease. RESULTS: The intraorbital pressure before the surgical procedure was 14.05 mmHg ± 9.19 for a normal value estimated in the literature at 4 mmHg ± 1.5 (statistically significant difference, P<0.0001). In the group presenting a compressive optic neuropathy (NO), the preoperative pressure was 26.8 mmHg ± 7.85 versus 9.8 mmHg ± 4.2 in the group without NO: the pressure was significantly higher in the group with NO (P<0.001). After orbital decompression (one to three walls depending on the severity of the exophthalmia), the pressure was measured at 4.3 mmHg ± 2.53 for the entire series: 6.4 mmHg ± 2.07 in the group with NO versus 3.6 mmHg ± 2.32 in the group without NO (significant difference, P<0.05). The total decrease in pressure induced by the surgery was 9.75 mmHg ± 7.55 and was significantly greater for the group with NO: reduction of 20.4 mmHg versus 6.2 mmHg for the group without NO (P<0.001). The reduction in pressure was greater after collapse of the first wall (floor) than after collapse of following walls for all groups (P<0.001). The maximum pressure observed during the intervention (caused by the instruments) was measured at 78.3 mmHg ± 23.47 without pupillary changes. DISCUSSION: This study shows that the intraorbital pressure is increased in Graves' orbitopathy and more in serious forms with compressive optic neuropathy. Orbital decompression, as its name indicates, provides decompression and a return to a near-normal orbital pressure situation. Compressive optic neuropathy does not result only from the direct compression of the oculomotor muscles on the optic nerve, but also from an overall rise in the pressure level within the orbital cavity. CONCLUSION: Intraorbital pressure is increased in Graves' orbitopathy, participating in the appearance of compressive optic neuropathy. Orbital decompression provides a significant reduction in intraorbital pressure.

[Clinical polymorphism of myasthenia gravis beginning with isolated ocular symptoms; a five years retrospective analysis]. / Polymorphisme clinique de la myasthénie à point de départ oculaire; analyse rétrospective sur cinq ans.

INTRODUCTION: myasthenia gravis is a neuromuscular junction disorder that can jeopardize the patient's life and has a high clinical polymorphism that makes it difficult to diagnose. PATIENTS AND METHODS: after reviewing the disease physiology, its clinical symptoms, and the different means to diagnose and treat it, we present a 15-patient series that we cared for at the Rothschild ophthalmologic foundation from 2002 to 2007 for myasthenia gravis that began with isolated ocular symptoms, so as to highlight the clinical diversity of this pathology. RESULTS: when the disease was diagnosed, 11 patients out of 15 had a ptosis with diplopia, two had an isolated ptosis, and two had isolated diplopia. After investigations, we discovered that three patients had a malignant thymoma and one had thymic hyperplasia. An autoimmune disease association was found in two patients: the first one had Hashimoto thyroiditis and the second one developed optical neuromyelitis a few years after his myasthenia gravis. Only three patients secondarily developed a generalized myasthenia gravis. DISCUSSION: our series of patients has a low disease generalization rate in comparison with the published data in the medical literature, indicating that two-thirds of patients with ocular myasthenia gravis should develop generalized myasthenia gravis within approximately 2 years after the beginning of their illness. This could be explained by the early consultation of these patients and the common prescription of an immunosuppressive therapy, reducing the risk of secondarily generalized myasthenia gravis according to some studies. CONCLUSION: despite the small number of patients, this study underlines the clinical polymorphism of ocular myasthenia gravis and the risks it may cause. Close collaboration between ophthalmologists and neurologists is needed to ensure good care for these patients.

[Compressive optic neuropathy related to an anterior clinoid mucocele]. / Neuropathie optique compressive liée à une mucocèle de l'apophyse clinoïde antérieure.

Nasal sinus mucoceles are an uncommon cause of painful optic neuropathy. We report the case of a patient presenting an acute compressive optic neuropathy related to an anterior clinoid mucocele. The diagnosis was mainly made with CT and MRI, and the patient was treated with endoscopic endonasal transseptal surgery 10 days after the beginning of the disorder. Visual recovery was complete 3 days later. We review the literature on the etiologies of this type of pathology, the work-up, and the possible treatments.

[Basedow exophthalmos]. / L'exophtalmie basedowienne.

Dysthyroid orbitopathy is a disease that is edematous and inflammatory, generally chronic, sometimes subacute or acute, and is characterized by exophthalmos in the majority of cases, retraction of the lid, restrictive strabismus with diplopia, corneal ulceration, ocular hypertension, and compressive optic neuropathy. Proptosis is the cardinal sign. Exophthalmos is frequently axial and is bilateral in 85%-90% of cases. Displacement of the globe in the vertical and horizontal axes is not rare, particularly when intense enlargement of an extraocular muscle produces a mass effect. Proptosis stems from a conflict for the space in the orbital cavity. The infiltration of the fat, muscles, and lacrimal gland by lymphocytes, plasma cells, and mucopolysaccharides, which are very hydrophilic, all contribute to the orbitopathy. The majority of patients with minimal exophthalmos do not require special treatment since they tend to improve spontaneously. In severe forms, it is important to evaluate the activity for steroid use to eliminate the inflammation in the soft tissues and to make rehabilitative surgery possible under better conditions. When a good response is not obtained, radiotherapy is evaluated. The surgical treatment by bone orbital decompression and sometimes lipectomy is indicated in inactive forms, disfiguring exophthalmos, certain particular cases such as dysthyroid optic neuropathy, ocular hypertension, corneal exposition.

[Orbital tumor emergencies in childhood]. / Urgences tumorales orbitaires pédiatriques.

Emergencies in childhood orbital tumorals are rare. The absolute emergency involves malignant primary orbital tumors, such as rhabdomyosarcoma or secondary malignant tumors (metastatic neuroblastoma, leukemia), involving a vital prognosis requiring prompt diagnosis. Delayed emergencies are usually vascular lesions. Among these lesions, immature orbital hemangioma, with a good prognosis, must be distinguished from orbital adnexal lymphangiomas, which are less frequent but can lead to dramatic cosmetic and functional disorders. In rare cases, they can be responsible for sudden, painful proptosis, due to orbital hemorrhage, with a risk of optic nerve compression, requiring emergency surgical treatment. Neurogenous lesions, either isolated, such as in gliomas, or associated with a systemic disease, such as Recklinghausen neurofibromatosis, threaten the functional prognosis. Diagnosis of pediatric orbital tumors is based on a good clinical examination, precise imaging investigations, and evaluation of the locoregional extension of the tumor. Biopsy is required in emergency situations, when rhabdomyosarcoma is suspected, in order to start the chemotherapy. However, the biopsy can be superfluous, and even useless or dangerous, when clinical and imaging investigations are sufficient to provide a diagnosis of capillary hemangioma, lymphangioma, or metastatic tumor from an abdominal malignancy. Treatment is closely related to the etiopathogenesis of the tumor. The outcomes are vital, functional and cosmetic. They may require orbital surgery (biopsy, tumoral resection, orbital decompression in case of a compressive hemorrhage), systemic corticotherapy (as in immature adnexal hemangioma), radiation, and chemotherapy (rhabdomyosarcoma, secondary malignant tumor). These diseases require a pediatric ophthalmological medical center specializing in orbital surgery, with close collaboration of multiple specialists such as onco-pediatricians and neurosurgeons.

[Periocular aging: physiopathogenesis, clinical aspect, and treatment]. / Vieillissement péri-oculaire ; physiopathogénie, aspect clinique et prise en charge.

Aging around the eyes plays a considerable role in facial aging. The demand for periocular rejuvenation is increasingly frequent. Until the past few years, eyelid esthetics was synonymous with blepharoplasty: surgery that consisted in resecting the myocutaneous excesses and reducing fatty deposits. The contribution of new medical and surgical treatments combined with new and more rigorous analysis of the esthetic disorders makes it possible to respond more precisely to patient demand and individualize surgical and/or medical treatment that is not highly aggressive and only uses products that are well tolerated, biocompatible, or resorbable.

[Diagnosis and therapeutic management of an intraorbital organic foreign body]. / Diagnostic et prise en charge des corps étrangers végétaux intra-orbitaires.

INTRODUCTION: Orbital organic foreign bodies are rare and can present different clinical features. The objective of this report is to show the danger of this type of foreign body, present the imaging data, and suggest a diagnostic approach and therapeutic management. We describe three cases of orbital organic foreign bodies with three different clinical presentations. CASE REPORTS: The first case was a 43-year-old male complaining of a chronic cutaneous fistula of the inferior right eyelid lasting 4 months after an orbital trauma with a wooden object. Two surgeries were necessary to extract the foreign bodies. In the second case, a 37-year-old female with post-traumatic ptosis after a bicycle accident several months before, the imaging exams revealed a fracture of the left orbital ceiling and a superior extraconical foreign body that was removed by a neurosurgery approach. The third case, a 69-year-old male with a right orbit abscess following a trauma with a tree branch had a persistent right orbit inflammation lasting 4 months despite two drainage surgeries and an extraction of an orbital organic foreign body. A third surgery was necessary to completely extract the foreign bodies. DISCUSSION/CONCLUSION: Detecting an orbital organic foreign body is sometimes difficult, especially when the clinical history is unclear, the ophthalmologic exam reveals no abnormalities, or if the patient is referred to the hospital several months after the traumatic event. Orbital organic foreign bodies can lead to potentially serious orbital or intracranial complications. Computed tomography and orbital ultrasound sometimes do not yield an evocative pattern: for instance, in computed tomography, the low density of wood can be misdiagnosed as air. On the other hand, these foreign bodies can persist in the orbit after several surgical explorations because they can easily break or migrate. Magnetic resonance imaging is useful when an orbital organic foreign body is suspected, but the analysis is easier when clinical data are suggestive.

[Surgical treatment of diffuse adult orbital lymphangioma: two case studies]. / Traitement chirurgical des lymphangiomes orbitaires diffus de l'adulte: à propos de deux cas.

PURPOSE: Orbital lymphangioma is a rare vascular malformation; it is a benign but severe anomaly because of its infiltrative, diffuse, and hemorrhagic nature, and its high morbidity rate. Surgical resection is a real challenge on account of the intricate architecture of the lesion. The authors report their surgical experience concerning two cases of diffuse orbital lymphangioma whose diagnosis was established in adulthood and whose surgical treatment was successful. CASE REPORTS: Two patients presented with adult orbital lymphangioma. Progression was slow during the first decade and then was quickly followed by complications: major exorbitism, compressive optic neuropathy, and corneal exposure. Neuroimaging showed a diffuse and cystic orbital malformation. Surgical resection was performed as completely as possible, in one case with a Krönlein orbitotomy and in the other case only via a conjunctive route. An aspirate drain was put in the orbit for 48 h so as to prevent dead spaces forming after resection, an essential risk factor of hemorrhagic or cystic recurrence. Systemic corticotherapy was administered for the 5 days following surgery. The resection was total in one case and subtotal in the other. The surgical follow-up was uneventful with an excellent aesthetic result and an improvement in visual acuity. After 12 months, no tumoral or hemorrhagic recurrence was noted. DISCUSSION: The surgical treatment of orbital lymphangiomas is challenging because of their infiltrative nature. In diffuse forms, a complete resection is rarely possible because of the risk of sacrificing visual function. In the two cases reported herein, the resection of the extraconal portion was complete, but the intraconal portion was completely removed only in one case. Using the aspirate drain, negative pressure was maintained in the orbital cavity, preventing the formation of chocolate cysts induced by surgery. Although the clinical result was very satisfying, long-term follow-up is necessary to evaluate recurrence. CONCLUSION: Diffuse orbital lymphangiomas can be treated successfully with a subtotal resection without clinical recurrence in the short term. These results are promising because they demonstrate that many orbital lymphangiomas can benefit from surgical treatment with an excellent esthetic and functional result.

High-resolution magnetic resonance imaging of the upper eyelid: correlation with the position of the skin crease in the upper eyelid.

PURPOSE: The position and appearance of the upper eyelid crease is one of the challenges in eyelid surgery. The aim of this study was to compare the clinical appearance of the upper eyelid crease with its anatomy, including the position of the levator, the septum, and the orbital fat as determined by Magnetic Resonance Imaging (MRI). MATERIALS AND METHODS: Oculoplastic examination was performed in normal volunteers of the same age with different appearances of the upper eyelid. MRI (Intera 1.5 T, Philips, the Netherlands) was carried out with both head and surface coils in all volunteers. Subjects were asked to keep their eyes closed during the whole procedure, thus reducing artefacts due to eyeball movements. The protocol lasted 8 minutes and included a multiplanar scout to obtain T1-weighted 3D-images. Thin sagittal T2 sequences were obtained along the plane of the optic nerve and focused on both orbits, allowing a precise analysis of the orbital content and eyelid anatomy. RESULTS: Six volunteers were included in this prospective study, three of Caucasian origin and three of North African, Central African and Asian origin, respectively. We distinguished two appearances of the crease: in some cases, the superior eyelid sulcus was convex, while in other cases it was concave. The superior eyelid fold was either high or low. Two Caucasian subjects had a deep, concave superior eyelid sulcus with a high crease. This crease appearance was correlated with a short concave appearance of the septum, which pulled back the pre-aponeurotic fat. The non-Caucasian volunteers all had a convex superior eyelid sulcus. The orbital septum insertion was low on the levator aponeurosis, and the orbital fat pad drooped onto the levator muscle, accounting for the convexity of the upper eyelid sulcus. A skin fold was formed by redundant skin over the crease. CONCLUSIONS: MRI provides excellent images and allows a good analysis of the upper eyelid components. It permits a detailed analysis of the architecture for a better understanding of its appearance and of the crease position, although further investigation with a larger number of volunteers is required.

[Surgical management of diplopia in dysthyroid orbitopathy]. / Prise en charge chirurgicale des diplopies dysthyroïdiennes.

INTRODUCTION: Forty percent of thyroid-related orbitopathies are associated with strabismus. In the healing phase of disease, fibrous hypertrophy of extraocular muscles may result in restrictive myopathy. We report our experience of surgical management in these cases. PATIENTS AND METHODS: We present a retrospective case series conducted on 42 patients, operated between September 1998 and April 2003. All patients underwent complete oculoplastic and orthoptic examinations. Muscular recession was performed in all cases, with general anesthesia in cases of clinical muscular restriction; adjustable recession with topical anesthesia was performed in cases of moderate muscular restriction. Postoperative alignment and elimination of diplopia in the functional position of the gaze were evaluated. RESULTS: The study included 42 patients (28 women, 14 men) with a mean age of 51 years. The mean follow-up was 48 months (range, 10 months to 6 years). Twenty-six patients presented vertical diplopia, 11 horizontal diplopia, and five mixed diplopia with a vertical and a horizontal component. These patients were operated on twice, beginning with vertical surgery. In cases of general anesthesia, muscular recession was adapted to an intraoperative forced duction test and a muscular elongation test. We obtained 94% good results for vertical diplopia and 81% for horizontal diplopia. Incomplete results were under correction. Adjustable muscular recession was adapted to intraoperative evaluation with patient participation. All patients had good results. CONCLUSION: Successful surgical treatment depends on precise identification of the muscles that are restricting motility and producing misalignment. We insist on the importance of an intraoperative forced duction test and a muscular elongation test in case of clinical muscular restriction. Adjustable surgery is useful in cases of moderate muscular fibrosis.

[Three-dimensional computer-assisted modeling of the orbital cavity and the eyelids]. / Modélisation informatique tridimensionnelle de la cavité orbitaire et des paupières.

PURPOSE: To develop a virtual model of the orbital cavity and the eyelids using a three-dimensional model. METHODS: Amapi Designer 7 and Carrara 3 Studio (Eovia, Mountain View, CA, USA) software were used to obtain 3D models of the orbital cavity and the eyelids. Three-dimensional creation is divided into two main processes. In the modeling process, a 3D model of the orbit, the arterial supply, and the eyelids are created using polygonal meshes and surgical tools with parametric surfaces. In the rendering process, colors are arbitrarily chosen to make elements in the model easier to read. A virtual camera is adjusted and light sources are created to produce virtual simulations of the orbit and the eyelids. RESULTS: Surgical techniques were illustrated with 3D models. Ptosis surgery (resection of the levator muscle and Müller's muscle conjunctival resection) and the transconjunctival approach to lower eyelid blepharoplasty were described step by step. CONCLUSION: Three-dimensional models have applications in many medical fields, providing representation of anatomical structures. They can be used to depict the anatomy of the orbital region in a realistic way. Three-dimensional computer-generated images are an aid in teaching residents in orbital anatomy and surgery.

[Optic nerve sheath meningioma: diagnosis and new treatment options, a case study of monocular blindness during pregnancy]. / Méningiomes du nerf optique, questions diagnostiques et nouvelles réponses thérapeutiques. A propos d'un cas révélé pendant la grossesse.

Optic nerve sheath meningiomas are challenging lesions to manage. We report here a case of primary optic nerve sheath meningioma in a pregnant woman with sudden unilateral vision loss. Then we review the current literature on the subject, prognosis factors, and report the results of fractionated radiotherapy and current therapeutic guidelines. Pregnancy may accelerate growth of meningiomas and this diagnosis must be considered in all cases of optic neuropathy in pregnant woman.

[Involutional ptosis]. / Les ptosis liés à l'âge.

Aponeurotic defects and disinsertion of the levator aponeurosis are responsible for acquired involutional ptosis. The typical clinical findings in aponeurotic defects are high or moderate ptosis, good to excellent levator function, thinning of the eyelid above the tarsus, high to absent lid crease, and normal Müller's muscle function. The purpose of the treatment is to repair the defect or to advance the aponeurosis on the tarsus. This surgery can be done via the anterior approach with aponeurotic surgery or via the posterior approach with Müller's muscle conjunctival resection. In all cases, upper lid blepharoplasty is down.