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Ancestor membership does not transfer phenotype values between groups.","importantHtml":""},"sections":[{"bodyHtml":"<p>Mutations in the RECQL4 gene cause about two-thirds of all cases of Rothmund-Thomson syndrome. This gene provides instructions for making one member of a protein family called RecQ helicases. Helicases are enzymes that bind to DNA and temporarily unwind the two spiral strands (double helix) of the DNA molecule. This unwinding is necessary for copying (replicating) DNA in preparation for cell division, and for repairing damaged DNA. The RECQL4 protein helps stabilize genetic information in the body&#x27;s cells and plays a role in replicating and repairing DNA.</p><p>RECQL4 mutations lead to the production of an abnormally short, nonfunctional version of the RECQL4 protein or prevent cells from making any of this protein. A shortage of the RECQL4 protein may prevent normal DNA replication and repair, causing widespread damage to a person&#x27;s genetic information over time. It is unclear how a loss of this protein&#x27;s activity leads to the specific features of Rothmund-Thomson syndrome.</p><p>In about one-third of individuals with Rothmund-Thomson syndrome, no mutation in the RECQL4 gene has been found. The cause of the condition in these individuals is unknown; however, researchers suspect that these cases may result from mutations in a gene related to the RECQL4 gene.</p><p>In some cases, chromosomal abnormalities have been identified in people with Rothmund-Thomson syndrome. These abnormalities include extra or missing genetic material, usually from chromosome 7 or chromosome 8, in some of an affected person&#x27;s cells. Researchers believe that these chromosomal changes arise because of the overall instability of an affected person&#x27;s genetic information; they do not cause the disorder.</p><p class=\"section-source\"><a href=\"https://medlineplus.gov/genetics/condition/rothmund-thomson-syndrome/#causes\">MedlinePlus Genetics: Causes</a></p>","key":"forms","title":"What causes Rothmund-Thomson syndrome?"},{"bodyHtml":"<p>Rothmund-Thomson syndrome is also characterized by sparse hair, eyebrows, and eyelashes; slow growth and small stature; abnormalities of the teeth and nails; and gastrointestinal problems in infancy, such as chronic diarrhea and vomiting. Some affected children develop a clouding of the lens of the eye (cataract), which affects vision. Many people with this disorder have skeletal abnormalities including absent or malformed bones, fused bones, and low bone mineral density (osteopenia or osteoporosis). Some of these abnormalities affect the development of bones in the forearms and the thumbs, and are known as radial ray malformations.</p><p>People with Rothmund-Thomson syndrome have an increased risk of developing cancer, particularly a form of bone cancer called osteosarcoma. These bone tumors most often develop during childhood or adolescence. Several types of skin cancer, including basal cell carcinoma and squamous cell carcinoma, are also more common in people with this disorder.</p><p>The varied signs and symptoms of Rothmund-Thomson syndrome overlap with features of other disorders, namely Baller-Gerold syndrome and RAPADILINO syndrome. These syndromes are also characterized by radial ray defects, skeletal abnormalities, and slow growth. All of these conditions can be caused by mutations in the same gene. Based on these similarities, researchers are investigating whether Rothmund-Thomson syndrome, Baller-Gerold syndrome, and RAPADILINO syndrome are separate disorders or part of a single syndrome with overlapping signs and symptoms.</p><p class=\"section-source\">Source: <a href=\"https://medlineplus.gov/genetics/condition/rothmund-thomson-syndrome\">MedlinePlus Genetics</a></p>","key":"overview","title":"Condition overview"}],"sharedSources":[],"slug":"rothmund-thomson-syndrome","sourceDocuments":[{"name":"Rothmund-Thomson syndrome","reviewed":"2013-08","sections":{"causes":{"fetchedAt":"2026-10-20T20:24:48.807979+00:00","label":"Causes","pageSha256":"8e1ecf637eba5144c07f56b1cde36c002b86746422535e1547eab524bbfee8a1","sourceUrl":"https://medlineplus.gov/genetics/condition/rothmund-thomson-syndrome/#causes","status":"available"}},"source_release":"2026-10-01","url":"https://medlineplus.gov/genetics/condition/rothmund-thomson-syndrome"}],"sourceNote":"MedlinePlus descriptions and Causes; original HPO annotations.","takeawayHtml":"Cause explanations are from MedlinePlus Genetics. Feature values below retain their original sources and patient groups.","title":"Rothmund-Thomson syndrome"},"schemaVersion":1}