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Biomedical subjects

M Binaghi

Publications and source records attributed to M Binaghi.

At least 19 recordsLinked to original sources

[Severe thyroid ophthalmopathy related to interferon alpha therapy].

The authors report a case of a 49-year-old patient presenting with dysthyroid ophthalmopathy, who was treated with interferon alpha for chronic hepatitis C. Proptosis appeared 3 months after treatment onset and many complications occurred over more than 1 year. The extreme severity seen in this case is infrequent. After a summary of other ocular damage linked to interferon, the authors suggest that every interferon treatment include a check-up before beginning therapy and regular biological and ophthalmological monitoring.

Female↗

[Choroidal neovascularization as a complication following laser treatment of central serous chorioretinopathy].

We report the case of a 39-year old man who presented with central serous chorioretinopathy. Two months after diagnosis, argon laser photocoagulation was performed. One month later, the patient noticed distortion and a reduction in vision revealing a subretinal neovascularization above the fovea next to the laser scar. The patient underwent surgical extraction of the neovascular membrane and recovered a visual acuity of 20/30. This case report shows a complication of laser treatment of central serous chorioretinopathy and underlines the diagnostic difficulties of this disease and its treatment modalities. The surgical excision, the first reported in this etiology, led to good visual recovery, as is usually observed in young patients operated on for neovascular membrane.

Adult↗

Choreic movements and MRI abnormalities in the subthalamic nuclei reversible after administration of coenzyme Q10 and multiple vitamins in a patient with bilateral optic neuropathy.

A 37-year-old man developed choreic movements of the limbs over a few months. His medical history included bilateral visual loss detected at the age of 9 and worsening at age 20. Visual field testing showed a central scotoma. Fundus examination showed atrophy of the optic disks and narrowing of vessels. The diagnosis of Leber hereditary optic neuropathy (LHON) was considered. There was no family history of visual loss or movement disorders. Blood lactate:pyruvate ratio was moderately elevated. Skeletal muscle biopsy was normal. Magnetic resonance imaging showed bilateral hypointense lesions on T1-weighted sequences in the subthalamic nuclei and in the lateral part of the substantia nigra. Linear hyperlucencies in the pyramidal tract facing the lateral part of the ruber nuclei were also demonstrated on T2-weighted sequences. Nine LHON-associated mutations were ruled out by RFLP analysis. Treatment with 250 mg coenzyme Q10 per day and multiple vitamins was initiated. Gradual recovery in movement disorders occurred over 1 year. Lactate to pyruvate ratio normalized. No change of visual function was observed. On magnetic resonance imaging performed 3 years later, lesions of the subthalamic nuclei almost completely disappeared. We think the patient might have an unusual, genetically uncharacterized mitochondrial disorder, combining optic neuropathy and chorea.

Adult↗

[Cataract surgery after bone marrow transplantation. Apropos of 36 cases].

OBJECT: Bone marrow transplantation has improved the prognosis of haematological malignancies, but patients are consequently at considerable risk of developing ocular complications, such as cataracts. MATERIAL AND METHODS: A retrospective case study of 36 eyes (24 patients), with cataract extraction after the transplantation. Surgery was performed at a mean of 4.5 years after transplantation and the average age was 33 years at the time of surgery. The lens changes were all of the posterior subcapsular type. Surgery was indicated for symptoms of dazzling and glare; visual acuity was only moderately decreased (4/10, P6). RESULTS: Cataract surgery required specific measures such to "polish" the posterior lens capsule, since cataract changes were often very adherent. The surgery follow-up was uncomplicated with the exception of five eyes which had an inflammatory reaction (3 cyclitic membrans, 2 "pseudo-endophthalmitis") but which showed complete regression after treatement. The follow-up after surgery varied from 6 months to 4.5 years. Final visual outcome was improved. 82.5% achieved 8/10, and 96.8% achieved P2. Three YAG-laser capsulotomies were performed, mainly for posterior capsulofibrosis. COMMENTS: Cataract surgery after bone marrow transplantation appears to have a good prognosis. Posterior capsule "polishing", though difficult, is possible in most cases. In our study, secondary cataract appears to be less frequent, but, further long-term follow-up is needed to confirm this statement.

Adolescent↗

[Does hemangioblastoma exist outside von Hippel-Lindau disease?].

Hemangioblastoma may arise in isolation ("sporadic" cases) or as a major manifestation of von Hippel-Lindau (VHL) disease, an autosomal dominant disorder with a prevalence of at least 1/36,000. In addition of central nervous system hemangioblastomas (cerebellum, spinal cord and retina), affected patients may develop renal cysts or carcinomas, pheochromocytomas and pancreatic cysts. A multidisciplinary group including neurosurgeons, geneticists, pathologists and clinicians from all involved specialities has been organized to develop a national registration of all hemangioblastoma and VHL patients. The findings of a preliminary 10-year study (1983-1993) conducted in France are presented. Two hundred thirteen cases of hemangioblastoma were reviewed for their location and genetic features. The majority (77%) of the tumors were located in the cerebellum whereas 23% were located inside the spinal canal. By thorough clinical examination of the patients and systematic genetic inquiry of their family background, it was found that 34.3% of the total (58.7% before age 30) were afflicted with VHL disease. Spinal hemangioblastomas were more often related to VHL disease than infra-tentorial locations (50% versus 36.6%). In addition, mean age at diagnosis in VHL disease was significantly younger than in sporadic cases (33.5 +/- 10 versus 43.6 +/- 15 years). Recent progress in VHL molecular genetics led to the identification of the mutated gene to the distal part of the short arm of chromosome 3 (3p25-3p26), paving the way to presymptomatic diagnosis and, hopefully, to elucidation of pathogenesis, which may offer a further glimpse into tumorigenesis in general. Because of the usually early adulthood onset, accurate presymptomatic diagnosis of affected members would be of great benefit to VHL families. However, the fact that very few mutations in the VHL gene are identified precludes molecular diagnosis of "sporadic" hemangioblastomas. In summary, this study reveals that VHL-related hemangioblastoma is a more common clinical problem that it was previously reported. Thus, all patients with an apparently isolated central nervous system hemangioblastoma should be investigated for evidence of VHL disease.

Adolescent↗

[Surgery for moderate or mild myopia].

After a long period of hesitation and reluctance, surgery of moderate to mild myopia (1 to 6 dioptries) is currently practiced by specialists in refractive surgery. At present, two ambulatory techniques are in competition: radial keratotomy, a truly surgical procedure that is more than 10 years' old, and the much more recent photorefractive keratectomy performed with an excimer laser beam, which is still under evaluation but has a very promising future. The goal of these two techniques is to correct myopia by flattening the cornea. The degree of correction obtained depends on several variables (some of which can be mastered), which explains why the results are not fully predictable. However, the overall results are satisfactory, provided the indications have been strictly selected. Per- and postoperatory complications are extremely rare. The main risk is early under-correction (particularly when the initial myopia is pronounced) or late over correction, mainly observed with radial keratotomy. Visual rehabilitation is much slower with the laser technique than after radial keratotomy. The two techniques are applied to patients aged from 20 to 40 years who have stable myopia, do not tolerate contact lenses and need an excellent sight for their professional or sporting activities.

Adult↗

[Corneal crystalline deposits in benign monoclonal gammopathies. Apropos of 3 cases].

Unusual corneal crystalline opacities at the level of Bowman's membrane and superficial stroma were observed in 3 patients with benign monoclonal gammopathy. Corneal immunohistochemical examination showed that the deposits consisted of immunoglobulin crystals identical to the paraprotein found in the serum (with the same light chain: Kappa in 2 cases and Lambda in the third case). The factors and mechanisms governing intracorneal immunoglobulin deposition in the cornea are discussed.

Adult↗

Eight-year follow-up of central serous chorioretinopathy with and without laser treatment.

A long-term retrospective study was conducted on two groups of patients affected with typical central serous chorioretinopathy (CSCR). One group was not treated and the other was treated by direct argon laser photocoagulation. CSCR shows a long-term good prognosis of visual acuity. The visual acuity of laser-treated eyes improves significantly (P less than or equal to 0.05), particularly in single focus cases (P less than or equal to 0.01). Unfortunately, these results cannot be statistically compared to the natural course of the non-treated patients because of the initial inhomogeneity of the two groups. Laser treatment did not produce any long-term complications. The recurrence rate in treated and untreated eyes was similar.

Adult↗

Sjögren-like syndrome after drug-induced toxic epidermal necrolysis.

7 of 9 patients recovering from a drug-induced toxic epidermal necrolysis (TEN) which they had had 2 months to 4 years before had xerostomia, or keratoconjunctivitis sicca, or both. 5 patients had symptoms; 2 had severe visual impairment. In 5 cases there was lymphocytic infiltration of small salivary glands; in 2 patients this was identical to that of Sjögren syndrome. None of the patients had antinuclear antibody. TEN may occur during acute graft-versus-host disease (GVHD) and these observations are reminiscent of the sicca syndromes reported during chronic GVHD. They suggest that autoimmune mechanisms may be involved in drug-induced TEN and that Sjögren syndrome may occur as the result of a drug reaction.

Adult↗