| Literature DB >> 21347399 |
Claire-Marie Legendre1, Catherine Charpentier-Côté, Régen Drouin, Chantal Bouffard.
Abstract
BACKGROUND: In 1986, two Canadian geneticists had demonstrated that Joseph Merrick, better known as the Elephant Man, suffered from the Proteus syndrome and not from neurofibromatosis type 1 (NF1), as was alleged by dermatologist Parkes in 1909. Despite this and although the two diseases differ at several levels: prevalence, diagnostic criteria, clinical manifestations and transmission, the confusion between NF1 and the "elephant man's" disease continues in medical and social representations by current linguistic usage, and in some media reports. With this article, we want to 1) document the persistence and extent of this fallacy, 2) identify certain critical factors that contribute to its persistence, and 3) evaluate its impact on the health and well being of patients with NF1 and their family members.Entities:
Mesh:
Year: 2011 PMID: 21347399 PMCID: PMC3036577 DOI: 10.1371/journal.pone.0016409
Source DB: PubMed Journal: PLoS One ISSN: 1932-6203 Impact factor: 3.240
Figure 1A man who suffered from Proteus syndrome (Joseph Merrick, the “elephant man”).
Figure 1 is in the public domain in USA (published before 1923) (see http://fr.wikipedia.org/wiki/Fichier:Joseph_Carey_Merrick.png).
Comparative table of the two disorders' various features*.
| NEUROFIBROMATOSIS | PROTEUS SYNDROME |
|
| |
| Frequent: 1/3,000–1/4,000 live births worldwide | Extremely rare: <1/1,000,000 live births worldwide |
| Equally prevalent in males and females | Two males for every female |
|
| |
| NF1, chromosome 17 (17q11.2) | Unknown |
|
| |
| 50% hereditary (autosomal dominant) | Sporadic |
| 50% sporadic ( | Postzygotic somatic mutation (embryonic lethal in non-mosaic form; never with diffuse involvement of the entire body) |
|
| |
| An individual has NF1 if at least two of these criteria are present. | An individual has Proteus syndrome if the three general criteria plus one criterion from category A or two from category B or three from category C are present. |
|
| |
| 1. Café-au-lait spots (at least 6): Diameter >1,5 cm after puberty; >0,5 cm before puberty | 1. Mosaic distribution of lesions |
| 2. Neurofibromas (at least 2 of any types) and/or one or more plexiform neurofibromas | 2. Sporadic occurrence |
| 3. Axillary and/or inguinal freckling | 3. Progressive course |
| 4. Optic gliomas |
|
| 5. Lisch nodules (2 or more) | 1. Cerebriform connective tissue nevus |
| 6. Characteristic osseous lesion (sphenoid dysplasia, thinning of long bone cortex with or without pseudoarthrosis |
|
| 7. First degree relative with NF1 | 1. Linear epidermal nevus |
| 2. Asymmetric, disproportionate overgrowth | |
| 3. Specific tumors before second decade | |
|
| |
| 1. Lipomas or focal atrophy of adipose tissue | |
| 2. Capillary, venous, or lymphatic malformation | |
| 3. Facial features including dolichocephaly, a long face, down-slanting palpebrae, ptosis, depressed nasal bridge, anteverted nares, and open mouth position while at rest | |
|
| |
| 1. High blood pressure | 1. Pulmonary abnormalities |
| 2. Scoliosis | 2. Renal abnormalities |
| 3. Malignant tumors | 3. Brain malformations |
|
| |
| 1. Attention deficit (with or without hyperactivity) disorder in 40% to 50% of cases | 1. Learning difficulties in 20% of cases |
| 2. Learning difficulties in 30% to 65% of cases | 2. Mental retardation in 10% to 15% of cases |
| 3. Slight mental retardation in 1% to 8% of cases (no consensus among authors) | 3. Psychological consequences of the disease |
| 4. Difficulty forming friendship in childhood | 4. Feeling of isolation |
| 5. Impact on quality of life | 5. Social stigmatization |
| 6. Difficulty establishing social relationships | 6. Courtesy stigma afflicts family members |
| 7. Psychological/psychiatric disorders | |
| 8. Esthetic considerations represent a psychological burden | |
*Adapted from Cohen, 1993; Hart, 2005; Biesecker, 2006, 2005, 2002; Turner, 2007; NIH, 1998.
Figure 2A woman who suffers from NF1.
(Photo: Marie-Soleil Lemay-Couture.).
Scientific Events at Which Presentations Were Made on Psychosocial and Ethical Issues Surrounding Neurofibromatosis.
| Scientific Event | Year | Country | Context | People We Met | Number of People Who Gave an Opinion |
| 2iéme journée scientifique de l'Axe mère-enfant (Second Annual Science Day of the Mother-Child Center), Centre de recherche clinique Étienne-Le Bel, CHUS, Sherbrooke, Quebec | 2008 | Canada | A science day at Université de Sherbrooke | Physicians, medical students | 6 |
| 6ième journée scientifique du Département de Pédiatrie (Sixth Annual Science Day of the Department of Pediatrics), CHUS, Sherbrooke, Quebec | 2008 | Canada | A science day at Université de Sherbrooke | Physicians, medical students | 7 |
| 50th Annual Meeting of the Club de recherches cliniques du Québec | 2008 | Canada | National congress | Physicians, medical students | 6 |
| 58th Annual Meeting of the American Society of Human Genetics | 2008 | USA | International congress | Physicians, medical students | 5 |
| 51st Annual Meeting of the Club de recherches cliniques du Québec | 2009 | Canada | National congress | Physicians, medical students | 5 |
| Les conférences de la Relève Gilles-Dupuis, Axe mére-enfant (Relève Gilles-Dupuis Speaker Series, Mother-Child Center), Centre de recherche clinique Étienne-Le Bel, CHUS, Sherbrooke, Quebec | 2010 | Canada | A science day at Université de Sherbrooke | Physicians, medical students | 15 |
| Assises de génétique humaine et médicale (Congress on Human and Medical Genetics) | 2010 | France | International congress | Physicians | 5 |
| TOTAL |
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