Diseases & Conditions


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

C Syndrome


Synonyms of C Syndrome
  • Opitz Trigonocephaly Syndrome
  • Trigonocephaly C Syndrome
  • Trigonocephaly Syndrome

Disorder Subdivisions



    General Discussion
    C syndrome, also known as Opitz trigonocephaly syndrome, is a rare disorder transmitted as a result of gonadal mosaicism. Mosaicism refers to a condition in which a person has cells that differ from each other in genetic makeup. The difference is usually a variation in the number of chromosomes. Normally, all body cells would have 46 chromosomes, but in mosaicism, some cells may have 45 or 47. Mosaicism occurs as a result of an error in cell division very early in fetal development.

    Affected individuals are born with a malformation in which the head is a triangular shape due to premature union of the skull bones (trigonocephaly), a narrow pointed forehead, a flat broad nasal bridge with a short nose, vertical folds over the inner corners of the eyes, an abnormal palate that is deeply furrowed, abnormalities of the ear, crossed eyes (strabismus), joints that are bent or in a fixed position, and loose skin. Developmental and learning disabilities are common.

    Organizations related to C Syndrome
    • FACES: The National Craniofacial Association
      P.O. Box 11082
      Chattanooga TN 37401
      Phone #: 423-266-1632
      800 #: 800-332-2373
      e-mail: faces@faces-cranio.org
      Home page: http://www.faces-cranio.org
    • MUMS (Mothers United for Moral Support, Inc) National Parent-to-Parent Network
      150 Custer Court
      Green Bay WI 54301-1243
      Phone #: 920-336-5333
      800 #: 877-336-5333
      e-mail: mums@netnet.net
      Home page: http://www.netnet.net/mums/
    • National Craniofacial Foundation
      3100 Carlisle Street
      Dallas TX 75204
      Phone #: --
      800 #: 800-535-3643
      e-mail: N/A
      Home page: N/A



    For a Complete Report

    This is an abstract of a report from the National Organization for Rare Disorders, Inc. ? (NORD). A copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html