Is DiGeorge Syndrome the Same as 22q11.2 Deletion?

Yes. In modern medicine, when a doctor diagnoses DiGeorge syndrome, they are almost always referring to 22q11.2 deletion syndrome ^[1].

If your doctor used the term “DiGeorge syndrome,” they are referring to the same condition you will see called 22q11.2 deletion syndrome ^[1]. The multiple names can be incredibly confusing for newly diagnosed families, but they describe a condition caused by the same missing piece of genetic material on chromosome 22 ^[2].

(Note: In rare cases, the physical symptoms of DiGeorge syndrome can be caused by a different genetic change or an environmental factor, but your genetic test results will clarify exactly what was found ^[3].)

The History Behind the Names

Before modern genetic testing existed, doctors diagnosed conditions based purely on the physical symptoms they could observe ^[2]. Because this condition affects people in very different ways, different doctors thought they were discovering entirely different diseases:

• DiGeorge Syndrome: In the 1960s, Dr. Angelo DiGeorge described patients who were born with specific heart defects, immune system problems, and low calcium levels ^[4].
• Velocardiofacial Syndrome (VCFS) or Shprintzen Syndrome: In the 1970s, Dr. Robert Shprintzen described a group of patients with a cleft palate (an opening in the roof of the mouth), specific facial features, and learning difficulties ^[5]. “Velo” refers to the palate, “cardio” to the heart, and “facial” to the face ^[6].
• Conotruncal Anomaly Face Syndrome (CTAFS): Another term used by doctors in Japan to describe patients with specific heart defects and facial features ^[1].

For decades, these were treated as completely separate conditions ^[2].

The Genetic Discovery

In the early 1990s, medical science took a huge leap forward ^[2]. Advanced genetic testing revealed that the vast majority of people diagnosed with DiGeorge syndrome, Velocardiofacial syndrome, and these other conditions all had the exact same genetic change ^[6]. They were all missing a tiny piece of DNA on chromosome 22, at a specific location called q11.2 (pronounced “twenty-two-Q-one-one-point-two”) ^[6].

Once doctors realized that a single genetic deletion was responsible for all these different symptoms, they began to unite the conditions under one name: 22q11.2 deletion syndrome ^[2].

Why Did My Doctor Call It DiGeorge Syndrome?

Even though “22q11.2 deletion syndrome” is the most accurate and modern term, many doctors still use the older names ^[1]. Your doctor might have called it DiGeorge syndrome because:

• It is the name they learned in medical school or training ^[1].
• Your or your child’s specific symptoms (such as heart and immune issues) closely match Dr. DiGeorge’s original description ^[1].
• It is sometimes used as a familiar shorthand by certain specialists ^[1].

You may also still see terms like “VCFS” or “DiGeorge” on your official medical charts or insurance paperwork ^[1]. Do not worry if your pediatrician or specialist continues to use the older terms—you do not need to correct them. The medical care they provide will still be appropriate ^[6].

One Condition, Many Symptoms

The reason the condition had so many names originally is because of its incredible variability (what doctors call “phenotypic heterogeneity”) ^[4]. Even though the genetic deletion is exactly the same, the condition can affect over 180 different parts of the body ^[6].

One person with 22q11.2 deletion syndrome might have a severe heart defect but no learning delays, while another might have a cleft palate and immune issues but a perfectly healthy heart ^[6]. This is why the older, symptom-based names fell out of favor—they didn’t capture the whole picture of the condition ^[1].

When researching online or looking for support groups, using the term “22q” or “22q11.2 deletion” will help you find the most up-to-date parent communities and medical resources. Today, no matter which historical name a doctor uses, the medical care and support you need are based on the specific symptoms you have, all guided by the modern understanding of the 22q11.2 deletion ^[6].