Disease Description (Causes and Symptoms)
- Definition and causes
- Stickler syndrome is a hereditary connective tissue disorder that is primarily inherited in an autosomal dominant manner. The main causes are variants in collagen-related genes such as COL2A1, COL11A1, COL11A2, and COL9A1, which affect the composition of connective tissues including cartilage, the vitreous body, and intervertebral discs.
- Summary of pathophysiology
- Abnormal collagen causes structural abnormalities and early degeneration in the eyes (vitreous body and retina), articular cartilage, skeletal growth plates, and facial bone development.
- Main symptoms (clinical manifestations)
- Ophthalmology: High myopia, vitreous abnormalities, and an increased risk of retinal detachment and cataracts (which may occur during childhood). Myopia has been reported in approximately 40% of individuals before age 10 and approximately 75% before age 20.
- Otolaryngology: Sensorineural or conductive hearing loss (which may be accompanied by otitis media or ossicular abnormalities).
- Oral and facial: Midface hypoplasia, a low nasal bridge, and cleft palate (particularly cleft palate and possible Pierre Robin sequence).
- Musculoskeletal: Joint hyperextension, early arthritis (generally worsening around age 30), hip, knee, and spinal abnormalities (such as scoliosis and kyphosis), and growth abnormalities.
- Cardiovascular: Valvular abnormalities such as mitral valve prolapse have been reported in some individuals (one report observed this in approximately 40%).
- Other: Short stature, occasional differences in intellectual development, and developmental problems may also occur.
Treatment
- Principles
- There is currently no definitive cure. A multidisciplinary approach by organ system and symptom (ophthalmology, otolaryngology, pediatric orthopedics/orthopedics, oral and maxillofacial surgery, cardiology, and clinical genetics) is necessary. Genetic counseling is recommended.
- Ophthalmologic management
- Regular ophthalmologic examinations (visual acuity, fundus examination, and ultrasound/vitreous evaluation)—the frequency depends on the severity of the condition (generally at least once a year).
- If retinal detachment occurs, surgical treatment (such as vitrectomy, laser treatment, or scleral buckling) may be performed. For high-risk patients, discuss with a specialist whether prophylactic laser treatment or extraocular scleral surgery should be considered.
- Vision correction (glasses or contact lenses); if cataract surgery is needed, discuss the risks and benefits with an ophthalmologist.
- Otolaryngology and hearing management
- Regular hearing tests; if necessary, hearing aids, middle-ear surgery (when otitis media is present), or rehabilitation (speech therapy).
- Oral, facial, and developmental treatment
- Cleft palate and oral problems may require surgical correction, speech therapy, and nutritional management.
- Orthopedic treatment
- For joint pain and functional impairment: physical therapy, weight management, joint braces, pain control (such as nonsteroidal anti-inflammatory drugs), and, if necessary, joint replacement surgery (such as hip replacement). Orthopedic evaluation and follow-up for scoliosis and deformities.
- Cardiac care
- When valvular abnormalities are present, follow-up echocardiography and medical or surgical treatment according to symptoms and severity. Whether prophylactic antibiotics should be used before surgery or dental procedures depends on the cardiac condition and the latest infective endocarditis guidelines (consult a cardiologist).
- Lifestyle management (precautions)
- If there is a risk of retinal detachment, consider limiting contact or impact sports (such as martial arts and activities involving frequent impacts to the cervical spine or eyes).
- Reduce the burden on the joints through weight management and low-impact aerobic and strength exercises.
- Regular checkups (ophthalmology, hearing, orthopedics, and cardiology) and genetic counseling are recommended.
Checklist Before an Outpatient Visit (Including Example Questions)
- What to prepare/bring
- Existing medical certificates and records of surgeries and hospitalizations (including cleft palate surgery and eye surgery)
- Previous genetic test results or blood test and imaging findings (including C-coding or test values)
- Copies of recent ophthalmologic results (visual acuity chart and fundus photographs) and hearing test (Audiogram) results, if available
- A list of current medications and allergies
- Family history (similar symptoms in parents or siblings and whether a genetic disorder has been diagnosed)
- Records of changes in symptoms (changes in vision, tinnitus or decreased hearing, joint pain/restricted movement, respiratory or cardiac symptoms, etc.)
- Items to tell the medical staff in advance during the visit
- When symptoms began and how they have progressed (for example, when myopia began to worsen, or the onset of sudden visual field defects or flashes of light)
- Whether you have had previous eye surgery (including retinal surgery)
- Limitations in daily life (related to exercise, school, or work)
Examples of General Questions to Ask the Doctor
- "What is the typical course and prognosis of this condition?"
- "What regular checkups should I (or my child) receive, and how often are they recommended?"
- "If I am currently taking medication or receiving treatment, what side effects or interactions should I be aware of?"
- "What should be considered regarding pregnancy, childbirth, and genetic counseling?"
Examples of Condition-Specific Questions
- Ophthalmology-related: "What is my (or my child's) risk of retinal detachment? Is prophylactic laser treatment or early surgery recommended?"
- Genetics and family planning: "Depending on the genetic test results, what is the probability of passing this condition on to my children, and what options are available for responding to this risk?"
(Prioritizing the questions above before the visit can make the consultation more efficient.)
Note: This summary includes general recommendations based on case reports and the literature. For individual care, follow the diagnosis and recommendations of the treating specialist.