Campomelic syndrome, long-limb type, is a rare disorder that affects the bones, muscles and cartilage. Symptoms of this condition include abnormal facial features, abnormal hand structure and abnormal joint development. It can also lead to limb deformities, such as clubfoot or curved fingers. In some cases, the affected person may have only one hand with a shortened ulna (forearm bone). There are no known causes f  Read More

The symptoms and physical findings associated with diastrophic dysplasia may be extremely variable, differing in range and severity even among affected family members (kindreds). However, in all individuals with the disorder, there is abnormal development of bones and joints of the body (skeletal and joint dysplasia). During normal development before birth (embryonic and fetal development) as well as development during early childhood,  Read More

Dyggve-Melchior-Clausen (DMC) syndrome is a rare, progressive genetic disorder characterized by abnormal skeletal development, microcephaly and intellectual disability. The condition was first reported by Dyggve, Melchior and Clausen in 1962 in three of eight siblings where the father was the mother's paternal uncle. Because of physical appearance and the present of acid mucopolysaccharides in the urine, Dyggve believed that their affected pat  Read More

HPP has remarkably wide-ranging severity. The six major clinical forms are separated based primarily upon the age when symptoms occur and the diagnosis is made. By decreasing severity, these forms are called perinatal, infantile, childhood (severe or mild), adult, and odontohypophosphatasia. Generally, HPP severity correlates with how much alkaline phosphatase activity remains in the body, with less enzyme activity causing more severe  Read More

Although researchers have been able to establish a clear syndrome with characteristic or “core” symptoms, much about the disorder is not fully understood. Several factors including the small number of people identified with this disorder, the lack of large clinical studies, and the underlying cause of the disorder being unknown prevent physicians from developing a complete picture of associated symptoms and prognosis. Therefore, it  Read More

Although researchers have been able to establish a clear syndrome with characteristic or “core” symptoms, much about the disorder is not fully understood. Several factors including the small number of people identified with this disorder, the lack of large clinical studies, and the underlying cause of the disorder being unknown prevent physicians from developing a complete picture of associated symptoms and prognosis. Therefore, it  Read More

Although researchers have been able to establish a clear syndrome with characteristic or “core” symptoms, much about the disorder is not fully understood. Several factors including the small number of people identified with this disorder, the lack of large clinical studies, and the underlying cause of the disorder being unknown prevent physicians from developing a complete picture of associated symptoms and prognosis. Therefore, it  Read More