How Does 22q11.2 Deletion Syndrome Affect Speech & Palate?

If your child sounds “nasal” when they speak, it is often due to a structural difference at the back of the roof of their mouth. In 22q11.2 deletion syndrome, the soft palate (the fleshy part at the back of the roof of the mouth) frequently cannot create a tight seal against the back of the throat. When this gap remains open during speech, air escapes into the nasal cavity, causing what doctors call “hypernasal” speech ^[1]. Because these structural differences can affect multiple areas of life, managing them will involve a comprehensive care team that evaluates your child’s complex needs ^[2].

Understanding VPI and Submucous Cleft Palate

The inability of the soft palate to close off the nasal airway is medically known as Velopharyngeal Insufficiency (VPI) ^[3]. The velopharynx is the area where the soft palate and the back of the throat meet. In children with 22q11.2 deletion syndrome, the anatomy of this area is often distinctly different from children without the syndrome, making them highly susceptible to VPI ^[4][3].

A common cause of VPI in this syndrome is a submucous cleft palate ^[5]. Unlike a typical cleft palate where there is a visible gap in the roof of the mouth, a submucous cleft is hidden under the mucous membrane (the pink lining of the mouth). The skin is intact, but the muscles underneath did not join together properly before birth ^[6]. This lack of joined muscle prevents the palate from moving correctly to close the airway.

How These Differences Affect Daily Life

Palate differences in 22q11.2 deletion syndrome can impact both communication and eating:

• Speech challenges: The primary sign of VPI is hypernasal speech ^[1]. Because the mouth cannot trap air to make certain sounds (like “p,” “b,” or “s”), speech can be difficult to understand.
• Feeding difficulties: Babies and young children may experience nasal regurgitation, where milk, liquids, or food come out of their nose while eating or swallowing. If your baby is struggling with this, reach out to a multidisciplinary care team—often including a specialized feeding therapist—who can help you find specialized feeding techniques and support to ensure your child eats safely ^[7].

Evaluating the Palate

To properly address VPI, your child’s care team will need to see exactly how the palate is moving. This often involves specialized speech evaluations and tests like a nasendoscopy (a tiny camera passed gently through the nose) or videofluoroscopy (an X-ray taken while speaking or swallowing). These tests are typically performed by specialized cleft or craniofacial teams who are experienced in guiding children through the process and helping them stay comfortable.

Additionally, before any surgical treatment is considered, doctors must order specialized imaging of the child’s neck ^[8]. Many children with 22q11.2 deletion syndrome have medialized carotid arteries—meaning the major blood vessels in the neck sit much closer to the back of the throat than usual ^[9][10]. Identifying the exact location of these arteries through preoperative imaging is a critical step to minimize surgical risks and ensure the surgical team uses the safest approach ^[9][8].

Treatment Options

Addressing VPI requires a multidisciplinary approach, often including an otolaryngologist (ENT), speech-language pathologist, and craniofacial surgeon ^[7]:

• Speech Therapy: Specialized pre- and post-operative speech therapy is very important ^[7]. While therapy can teach your child how to place their tongue and lips to improve articulation, it cannot fix the physical anatomical gap causing air to leak into the nose ^[11].
• Corrective Surgery: For most children with VPI related to 22q11.2 deletion syndrome, surgery is necessary to physically reconstruct the area and prevent air leakage ^[10]. For children with moderate-to-severe VPI, surgery can be considered around age 3 years ^[12]. Procedures like a muscle dissection repair, pharyngeal flap surgery, or sphincter pharyngoplasty aim to improve palate-closure function and reduce hypernasal speech ^[1][9]. Correcting the anatomy often reduces the total amount of speech therapy a child will ultimately need by providing a more normal structure to work with ^[13].