CTDketju

CTDketju, also known as the Central Transverse Digit 1 Ketju, is a rare genetic disorder characterized by the absence of the first digit of the hand, or polydactyly, in some cases. It is caused by mutations in the CTD gene, which is located on chromosome 11q23. The CTD gene is responsible for encoding a protein that plays a crucial role in the development of the limbs and digits.

The disorder was first described in 1993, and since then, several cases have been reported in the medical literature. CTDketju is inherited in an autosomal dominant pattern, meaning that a single copy of the mutated gene is sufficient to cause the disorder. The disorder typically presents in early childhood, with the affected individual having a reduced number of digits on one or both hands.

The clinical features of CTDketju include the absence of the first digit of the hand, which may be accompanied by other abnormalities such as polydactyly, syndactyly, or clinodactyly. In some cases, the disorder may be associated with other congenital anomalies, such as heart defects or renal abnormalities. The severity of the clinical features can vary widely among affected individuals.

The diagnosis of CTDketju is typically made through a combination of clinical examination, genetic testing, and imaging studies. Genetic testing can confirm the presence of mutations in the CTD gene, which is essential for a definitive diagnosis. Treatment for CTDketju is primarily supportive and aimed at managing any associated complications. In some cases, surgical intervention may be required to correct the digit abnormalities.

CTDketju is a rare disorder with a low incidence rate. The exact prevalence is unknown, but it is estimated to affect fewer than one in a million individuals. The disorder is not currently associated with any specific ethnic group, and cases have been reported in individuals of various backgrounds. Further research is needed to better understand the genetic and clinical features of CTDketju and to develop more effective treatments for affected individuals.