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S. Atkinson and P. Kendall-Taylor

The interaction between TSH and EGF receptor binding in thyroid cells was first demonstrated by Westermark et al. (1985), using suspension cultures of thyroid follicles, pre-incubation with TSH caused a significant increase in the binding of EGF to thyroid cells. We have previously described a similar phenomena using porcine thyroid cell monolayer preparations (Atkinson & Kendall-Taylor 1986). This increase in binding is caused by an increase in the number of EGF receptors expressed with no significant change in the binding affinity of the receptor. This observation may prove of interest with regard to the controversial nature of the trophic role of TSH and the difficulty in demonstrating a TSH trophic effect in vitro (Risdall et al. 1984; Valente et al. 1983).

The mechanism by which the TSH effect on EGF-binding is achieved is unclear, other than the observation that it is cyclic AMP mediated and involves protein synthesis. Since thyroid

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P. Kendall-Taylor, D. Jones, and S. Atkinson

Abstract. An autoantibody to orbital antigens is found in patients with Graves' ophthalmopathy. This autoantibody also binds to skeletal muscle antigen. Occasional positive responses have been seen in patients with Hashimoto's disease and with non-organ-specific autoimmune disease. Eye muscle has a higher innervation ratio than skeletal muscle and may be of different embryological origin, but it is nevertheless closely related to skeletal muscle and it is perhaps not surprising that the antibody should interact with both these types of muscle. What remains quite unexplained, is why the disease process apparently affects eye muscle only. The antigen appears to be distinct from thyroidal antigens, but further work with a larger patient population is necessary before one can be certain of this. To date it has been possible to exclude the cytoskeletal proteins, myosin and actin, and also the TSH receptor as possible candidates for the responsible antigens. Further studies are in progress to elucidate the nature of this muscle antigen.

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MF Prummel, A Bakker, WM Wiersinga, L Baldeschi, MP Mourits, P Kendall-Taylor, P Perros, C Neoh, AJ Dickinson, JH Lazarus, CM Lane, AE Heufelder, GJ Kahaly, S Pitz, J Orgiazzi, A Hullo, A Pinchera, C Marcocci, MS Sartini, R Rocchi, M Nardi, GE Krassas, and A Halkias

To improve management of patients with Graves' orbitopathy, a multi-center collaborative approach is necessary in order to have large enough sample sizes for meaningful randomized clinical trials. This is hampered by a lack of consensus on how to investigate the eye condition. The European Group on Graves' Orbitopathy aims to overcome this and has designed a preliminary case record form (CRF) to assess Graves' orbitopathy patients. This form was used in this first multi-center study. AIM: To investigate patient characteristics and treatment strategies in 152 new consecutively referred patients with thyroid eye disease seen in nine large European referral centers. METHODS: Newly referred patients with Graves' orbitopathy were included who were seen between September and December 2000. Demographic data and a complete ophthalmological assessment were recorded. RESULTS: One-hundred and fifty-two patients (77% females) were included. Diabetes was present in 9%, and glaucoma or cataract in 14% of patients. Forty percent were current smokers, 9% also had dermopathy, and only 33% reported a positive family history of thyroid disease. Mild eye disease was seen in 40%, moderately severe eye disease was seen in 33% and severe eye disease was seen in 28% of patients. Soft tissue involvement was the most frequent abnormality (seen in 75%), proptosis > or =21 mm was found in 63%, eye motility dysfunction in 49%, keratopathy in 16% and optic nerve involvement was found in 21% of patients. According to the clinical impression, 60% had active eye disease. Immunosuppressive treatment was planned more frequently in active patients (57/86; 66%) than in inactive patients (5/57, 9%; Chi-square 46.16; P<0.02). There were no important differences among the eight centers regarding the severity and the activity of their patients. CONCLUSIONS: In view of the large number of patients recruited in only 4 months, multi-center studies in the eight EUGOGO centers appear to be feasible.

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P Perros, L Baldeschi, K Boboridis, A J Dickinson, A Hullo, G J Kahaly, P Kendall-Taylor, G E Krassas, C M Lane, J H Lazarus, C Marcocci, M Marino, M P Mourits, M Nardi, J Orgiazzi, A Pinchera, S Pitz, M F Prummel, and W M Wiersinga

Group-author : The European Group of Graves’ Orbitopathy

Objective: To determine management patterns among clinicians who treat patients with Graves’ orbitopathy (GO) in Europe.

Design and methods: Questionnaire survey including a case scenario of members of professional organisations representing endocrinologists, ophthalmologists and nuclear medicine physicians.

Results: A multidisciplinary approach to manage GO was valued by 96.3% of responders, although 31.5% did not participate or refer to a multidisciplinary team and 21.5% of patients with GO treated by responders were not managed in a multidisciplinary setting. Access to surgery for sight-threatening GO was available only within weeks or months according to 59.5% of responders. Reluctance to refer urgently to an ophthalmologist was noted by 32.7% of responders despite the presence of suspected optic neuropathy. The use of steroids was not influenced by the age of the patient, but fewer responders chose to use steroids in a diabetic patient (72.1 vs 90.5%, P < 0.001). Development of cushingoid features resulted in a reduction in steroid use (90.5 vs 36.5%, P < 0.001) and increase in the use of orbital irradiation (from 23.8% to 40.4%, P < 0.05) and surgical decompression (from 20.9 to 52.9%, P < 0.001). More ophthalmologists chose surgical decompression for patients with threatened vision due to optic neuropathy, who were intolerant to steroids than other specialists (70.3 vs 41.8%, P < 0.01).

Conclusion: Deficiencies in the management of patients with GO in Europe were identified by this survey. Further training of clinicians, easier access of patients to specialist multidisciplinary centres and the publication of practice guidelines may help improve the management of this condition in Europe.

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W M Wiersinga, P Perros, G J Kahaly, M P Mourits, L Baldeschi, K Boboridis, A Boschi, A J Dickinson, P Kendall-Taylor, G E Krassas, C M Lane, J H Lazarus, C Marcocci, M Marino, M Nardi, C Neoh, J Orgiazzi, A Pinchera, S Pitz, M F Prummel, M S Sartini, M Stahl, and G von Arx

Group-author : The European Group on Graves’ Orbitopathy (EUGOGO)