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Medical Genetics

Chromosome Abnormalities

There are many different types of chromosome abnormalities that require clinical care by a physician or other healthcare professional. Listed in the directory below are some, for which we have provided a brief overview.

If you cannot find the information in which you are interested, please visit the Medical Genetics Online Resources page in this Web site for an Internet/World Wide Web address that may contain additional information on that topic.

Overview of Chromosome Abnormalities

Types of Chromosome Abnormalities

Numerical Abnormalities: Overview of Trisomies and Monosomies

Down Syndrome

Trisomy 18 & 13

Turner Syndrome

Structural Abnormalities: Deletions (Cri du Chat) and Duplications (Pallister Killian)

Translocations

Translocation Down Syndrome

Other Arrangements: Rings and Inversions

Mosaicism

Mosaic Down Syndrome

How Chromosome Abnormalities Happen: Meiosis, Mitosis, Maternal Age, Environment

Chance a Chromosome Abnormality Will Occur Again: Numerical, Structural (Inherited and De Novo), Mosaicism

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Online Resources page of this Web.

Topic Home Page - Topic Index

Contact information:

Raymond Lewandowski, MD
Medical Director, Geneticist

Ofelia Rivera
Office Manager

Deborah Dansby
Sonographer Supervisor

Denise Dominguez
Valley Supervisor

Andrea Ramirez
Senior Genetic Counselor

CPSST - Driscoll Genetics Services
5920 Saratoga Blvd. 540
Corpus Christi, Texas 78414
Phone: (361) 694-1600 or (361) 985-6600
Fax: (361) 985-6603
Hours 8-5 pm

CPSST - Driscoll Genetics Services -Brownsville
1096 Los Ebanos, Suite B
Brownsville, TX 78520
Phone: (956) 544-5663
Fax: (956) 544-7386

CPSST - Driscoll Genetics Services - Harlingen
2220 Haine Dr., Suite #46
Harlingen, TX 78550
Phone: (956) 428-0897
Fax: (956) 428-0899

CPSST - Driscoll Genetics Services - McAllen
1910 S. First St., Suite #500
McAllen, TX 78501
Phone: (956) 686-0503
Fax: (956) 668-0503
Hours: 8 – 5 Monday – Friday

Further Reading

Genetics Information Index

Overview of Birth Defects

Chromosome Abnormalities

Single Gene Defects

The Difference Between a Chromosome Abnormality and a Single Gene Defect

Multifactorial Inheritance

Teratogens

Non-Traditional Inheritance

Evaluating a Child for Birth Defects

Testing for Birth Defects

Uses of Genetic Testing

Genetic Services: When, Where, How

Identification, Treatment, and Prevention of Birth Defects

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Click here to learn about Genetics Services | Contact us