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Duchenne muscular dystrophy (DMD) is a result of a X-linked recessive inherited mutation of the DMD gene which contains 79 exons. This rare disease is passed on by the mother who is called a carrier. Primarily it affects boys, but in rare cases it can affect girls. Dystrophin protein is mostly located in skeletal and cardiac muscles, which explains muscular and cardiac manifestations in symptomatic female DMD-carriers. Dystrophin is also present in extramuscular tissues. Some dystrophin isoforms are exclusively or predominantly expressed in the brain or the retina. It has been reported that DMD patients and DMD-carriers present normal visual acuity, but abnormal electroretinographic findings. As symptomatic female DMD are very rare, ophthalmic screening of the female patient with deletions of exons 12- 29 is valuable. Studying the functional relationship between ocular symptoms and related different deletions of exons dystrophin gene may further elucidate the pathophysiology in DMD.

Background: Information on rare diseases are often complex to understand, or difficult to access and additional support is often necessary. Rare diseases helplines work together across Europe to respond to calls and emails from the public at large, including patients, health care professionals, families, and students. Measuring the activity of helplines can help decision makers to allocate adequate funds when deciding to create or expand an equivalent service., Objective: Data presented are referred to a monthly user profile analysis, which is one of the activities that each helpline has to carry out to be part of the network. This survey aimed to explore the information requests and characteristics of users of rare diseases helplines in different European countries. Another aim was to analyze these data with respect to users' characteristics, helpline characteristics, topics of the inquiries, and technologies used to provide information. With this survey, we measure data that are key for planning information services on rare diseases in the context of the development of national plans for rare diseases., Methods: A survey was conducted based on all calls, emails, visits, or letters received from November 1 to 30, 2012 to monitor the activity represented by 12 helplines. Data were collected by a common standardized form, using ORPHA Codes for rare diseases, when applicable. No personal data identifying the inquirer were collected. It was a descriptive approach documenting on the number and purpose of inquiries, the number of respondents, the mode of contact, the category of the inquirer in relation to the patient, the inquirer's gender, age and region of residence, the patient's age when applicable, the type and duration of response, and the satisfaction as scored by the respondents., Results: A total of 1676 calls, emails, or letters were received from November 1 to 30, 2012. Inquiries were mostly about specific diseases. An average of 23 minutes was spent for each inquiry. The inquirer was a patient in 571/1676 inquiries (ie, 34.07% of all cases; 95% CI 31.8-36.3). Other inquirers included relatives (520/1676, 31.03%; 95% CI 28.9-33.3), health care professionals (354/1676, 21.12%; 95% CI 19.2-23.1), and miscellaneous inquirers (230/1676, 13.72%; 95% CI 12.1-15.4). Telephone remained the main mode of contact (988/1676, 58.95%; 95% CI 56.6-61.3), followed by emails (609/1676, 36.34%; 95% CI 34.0-38.6). The three main reasons of inquiries were to acquire about information on the disease (682/2242, 30.42%; 95% CI 27.8-32.1), a specialized center/expert (404/2242, 18.02%; 95% CI 15.9-19.6), and social care (240/2242, 10.70%; 95% CI 9.1-12.0)., Conclusions: The helplines service responds to the demands of the public, however more inquiry-categories could be responded to. This leaves the possibility to expand the scope of the helplines, for example by providing assistance to patients when they are reporting suspected adverse drug reactions as provided by Directive 2010/84/EU or by providing information on patients' rights to cross-border care, as provided by Directive 2010/24/EU.