Submucous cleft palate: What is it and how does it impact on speech?
What exactly is a submucous cleft palate?
A submucous cleft palate (SMCP) is much less obvious than its counterparts, cleft of lip and/or palate, and can profoundly impact a child’s speech development. It leads to often extreme hyper nasal speech and difficulty with producing many sounds (/K/ /G/ /T/ /D/ /P/ /B/ /S/ /Z/ /F/ /V/).
In short, the muscles and bone of the soft palate, and sometimes the hard palate, do not fuse completely during foetal development and the mucous membrane that lines the roof of the mouth remains intact, effectively camouflaging the underlying muscular and bony deficit.
So, while the surface of the palate appears normal, the essential muscle and functions responsible for sealing off the nasal cavity from the oral cavity during speech are compromised. This cleft (or lack of muscle) can be seen as a bluish midline discoloration of the soft palate, often a bifid (split) uvula, and at times a notch in the posterior border of the hard palate can be felt upon palpation. However, these signs aren’t always present or easily discernible, contributing to the difficulty arriving at a diagnosis.
Diagnosing a submucous cleft palate is often akin to searching for a needle in a haystack, especially for the untrained eye. Unlike overt clefts that are visually apparent at birth, an SMCP can go undiagnosed for years, sometimes well into childhood or even adolescence. Paediatricians and even ENT surgeons have been known to miss it during routine checks due to the intact mucosal lining. Parents might notice their child’s speech sounds ‘different’ or ‘nasal’ but struggle to pinpoint the cause. Children might undergo extensive speech therapy without a proper diagnosis, as the underlying structural issue continues to hinder progress.
My experience as a speech therapist in private practice:
Over my years of practice, I have encountered several children presenting with persistent hyper-nasal speech and significant difficulties producing plosive and fricative sounds.
It has been incredibly rewarding, though at times challenging, to successfully diagnose SMCP in a number of these children. My approach often involves:
- a meticulous oral motor examination,
- careful listening for the specific qualities of hypernasality,
- and a deep understanding of the physiological requirements for clear speech sound production.
When I suspect an SMCP, I refer these children to Great Ormond Street Hospital where a fantastic multidisciplinary team, typically including ENT surgeons and a specialist speech-language therapist can conduct more definitive assessments. These assessments often involve instrumental analyses such as videofluoroscopy or nasoendoscopy, which provide objective measures of velopharyngeal function and visual confirmation of the anatomical deficit.
The path to resolution: surgery, therapy, and successful outcomes
Surgery
The journey for these children, once diagnosed, often involves surgical intervention. It’s not uncommon for children with SMCP to undergo multiple operations to achieve optimal velopharyngeal closure. These procedures aim to reconstruct or augment the velopharyngeal mechanism, enabling it to effectively separate the oral and nasal cavities during speech. The specific surgical approach depends on the individual child’s anatomy and the severity of the velopharyngeal insufficiency. It’s a testament to the skill of these specialised surgeons that such intricate repairs can be performed with remarkable success.
Speech therapy
Following surgery these children embark on the crucial phase of speech therapy. While surgery addresses the structural problem, speech therapy helps a child learn to utilise their newly improved anatomy. It involves intensive work on developing oral airflow, establishing correct articulatory placement, and reducing learned compensatory strategies that have developed due to the original structural deficit. It is immensely gratifying to witness the transformation. Children who once struggled to produce basic sounds, whose speech was difficult to understand, gradually develop clear speech.
Next steps?
If you’re a parent concerned about your child’s speech and feeding, you’re not alone. The journey can feel confusing, but professional guidance can make all the difference. Never hesitate to have a second opinion when you have that niggling feeling that there is something that has not yet been explored. At London Speech and Feeding I specialise in being thorough and thinking outside the box.
I am here to provide the support you need. Reach out to schedule a consultation and take the first step towards helping your child communicate and thrive.
Sonja McGeachie
Highly Specialist Speech and Language Therapist
Owner of The London Speech and Feeding Practice.
Find a speech and language therapist for your child in London. Are you concerned about your child’s speech, feeding or communication skills and don’t know where to turn? Please contact me and we can discuss how I can help you or visit my services page.
