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Living with Cleft palate-lateral synechia syndrome

A condition present from birth with a cleft palate and bands of tissue joining the palate to the floor of the mouth.

Understanding Cleft palate-lateral synechia syndrome

Cleft palate-lateral synechia syndrome (CPLS) is a birth difference where a cleft palate comes with bands of tissue (synechiae) inside the mouth.

The bands connect the edges of the palate to the floor of the mouth. GARD says it is presumed to be passed down in an autosomal dominant way. It lists onset during pregnancy and at birth.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Cleft palate
  • Bands of tissue inside the mouth
  • Small lower jaw
  • Changes in voice
  • Drooping lower lip

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include ear, nose, and throat specialists and genetic specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    World Craniofacial Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Ear, nose, and throat specialists (otolaryngologists); Genetic specialists (geneticists)
Expert care
Expert lists: World Craniofacial Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with World Craniofacial Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
How should the bands in the mouth be treated?
What is the plan for repairing the cleft palate?
Can genetic counseling help my family understand inheritance?

Quick facts

Symptoms usually startduring Pregnancy and as a Newborn
InheritanceAutosomal Dominant

GARD says it is presumed to be inherited in an autosomal dominant way, so one changed copy of a gene may be enough. It doesn't name a gene.

Genetic

Also known as: cleft palate lateral synechia syndrome; cpls - cleft palate-lateral synechia syndrome; cpls syndrome; syngnathia

Patient organizations

Source: NIH GARD · Cleft palate-lateral synechia syndromeGARD ID 1391 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Cleft palate-lateral synechia syndrome.

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