The Chromosome 18 Clinical Resource Center

Ring Chromosome 18: A Case Report

Ring chromosomes are rare chromosomal disorders that usually appear to occur de novo. A ring chromosome forms when due to deletion both ends of chromosome fuse with each other. Depending on the amount of chromosomal deletion, the clinical manifestations may be different. So, ring 18 syndrome is characterized by severe mental growth retardation as well as microcephaly, brain and ocular malformat...

What is the Clinical Skills Learning Center?

With shorter periods of hospitalazation, fewer patient beds and more health care facilities in the society, patients are now more acutely ill and highly dependent, causing less opportunities for medical students to practice and learn basic clinical skills. On the other hand, enhanced patient rights and other learnig limitations require that professional education provide not only knowledge and ...

Williams syndrome and chromosome 18.

Non-disjunction of chromosome 18.

A sample of 100 trisomy 18 conceptuses analysed separately and together with a published sample of 61 conceptuses confirms that an error in maternal meiosis II (MII) is the most frequent cause of non-disjunction for chromosome 18. This is unlike all other human trisomies that have been studied, which show a higher frequency in maternal meiosis I (MI). Maternal MI trisomy 18 shows a low frequenc...

Language Technology Resource Center

This paper describes the Language Technology Resource Center (LTRC), a U.S. Government website for providing information and tools for users of languages (e.g., translators, analysts, etc.) The LTRC provides information on a broad range of products and tools, and provides a means for product developers and researchers to provide the U.S. Government and the public with information about their wo...