#410 Gypsy Rose Blanchard’s 1q21.1 Microdeletion: What Does It Explain?

This episode drop from the PRETEND podcast series “The Gypsy Rose Obsession” features Kira Dineen explaining what Gypsy Rose Blanchard’s genetic test result may, and may not, mean.

Gypsy Rose Blanchard’s medical history has been scrutinized for years. Throughout her childhood, her mother, Dee Dee Blanchard, presented her as having numerous serious medical conditions, resulting in medications, procedures, mobility aids, and countless medical appointments. In 2015, Dee Dee was murdered by Gypsy’s then-boyfriend in a crime Gypsy helped plan.

The case has since inspired documentaries, television series, podcasts, and an enormous amount of online speculation. But one part of Gypsy’s medical history has received relatively little attention: a chromosomal microdeletion identified through genetic testing.

In this special episode drop, we are sharing the fifth installment of “The Gypsy Rose Obsession,” an investigative series from the PRETEND podcast hosted by Javier Leiva. The first four episodes explore the online community that continues to investigate, debate, and develop competing theories about nearly every aspect of Gypsy’s life. We recommend listening to those episodes first for the full context behind the people, records, and claims discussed in this installment.

Episode five turns its attention to Gypsy’s reported 1q21.1 microdeletion. DNA Today host and certified genetic counselor Kira Dineen joins Javier as a genetics expert to examine the available records and explain the complexities of interpreting this finding.

Kira breaks down chromosomes using a genomic-library analogy, explains how a chromosomal “address” such as 1q21.1 is read, and puts the reported deletion size into perspective. She also compares a traditional karyotype with a chromosomal microarray and explains how a deletion can be too small to detect through one form of testing but identifiable through another.

What can the microdeletion tell us about Gypsy’s health? Why might her earlier clinical notes and a later laboratory report describe the finding differently? Could the deletion explain claims involving paralysis, leukemia, or the need for a feeding tube? Most importantly, how do we distinguish a possible genetic association from evidence that a particular finding caused someone’s medical, psychiatric, or behavioral features?

This episode discusses medical child abuse, violence, and murder. Please take care while listening.

Episode Discussion Topics

• What genetic counselors do and how they help patients understand genetic testing
• Chromosomes, genes, and microdeletions explained through a genomic-library analogy
• How to interpret the chromosomal address “1q21.1”
• What it means to have a piece of chromosome 1 missing
• Putting the size of the deletion into perspective
• Why the size of a genetic change does not always predict its medical impact
• The wide spectrum associated with 1q21.1 microdeletions, ranging from no apparent features to developmental and congenital differences
• How two people with the same or similar deletion can be affected very differently
• Why identifying the deletion does not mean someone will develop every associated condition
• Possible developmental, neurological, physical, and behavioral features reported with 1q21.1 microdeletions
• The difference between a genetic risk factor and a diagnosis or prediction
• Whether paralysis, leukemia, or feeding-tube use are associated with this deletion
• Why a genetic finding should not automatically be used to explain every aspect of someone’s medical or behavioral history
• The limitations of interpreting genetic information without a complete medical evaluation and family history

The information presented in this episode is intended for education and discussion and should not be considered individualized medical advice. Genetic test results should be interpreted by a qualified healthcare professional in the context of the individual’s complete medical and family history.

Resources & Links

• Listen to PRETEND on Apple Podcasts
• Listen to PRETEND on Spotify
• Learn more at the PRETEND podcast website
• 1q21.1 Microdeletion—MedlinePlus Genetics
• 1q21.1 Recurrent Deletion—GeneReviews
• 1q21.1 Microdeletions—Unique, Understanding Rare Chromosome and Gene Disorders

Relevant DNA Today Podcast Episodes True Crime and Forensic Genetics

• #402 How Genetic Genealogy Caught the Golden State Killer — Retired cold-case investigator Paul Holes explains how investigative genetic genealogy identified Joseph DeAngelo and discusses DNA evidence in the Golden State Killer, Zodiac Killer, and other major cases.
• #326 How DNA Solves Crimes: The Forensic Science Behind True Crime — DNA-analysis pioneer Dr. Henry Erlich explores PCR, forensic DNA databases, exonerations, the O.J. Simpson case, and the scientific and ethical complexities of DNA evidence.
• #131 Libby Copeland on Law Enforcement Use of Genetic Databases — Journalist and author Libby Copeland examines how law enforcement uses consumer genetic databases, including GEDmatch, familial searching, and the privacy questions raised by the Golden State Killer investigation.

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