Abnormal Fetal Nasal Bone Visualization C5676633
A prenatal ultrasound finding where the fetal nasal bone cannot be clearly seen. It may indicate chromosomal conditions and typically requires further testing. Consultation with a maternal-fetal medicine specialist is recommended.
Key facts at a glance
- ICD-10
- Q89.9
- ICD-11
- LA00.0
- Body system
- congenital
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Generalized symptoms
(congenital)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Detailed ultrasound follow-up
Repeat targeted ultrasound examinations assess whether the nasal bone becomes visible in subsequent scans, as visualization may improve with gestational age.
Exercise prescription and weight management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Genetic counseling referral
Referral to genetic counseling provides families with information about associated chromosomal conditions and helps them understand screening options.
Additional treatment options
Advanced diagnostic testing
Non-invasive prenatal testing or amniocentesis may be offered to evaluate for chromosomal abnormalities when nasal bone visualization is abnormal.
procedureEmotional support and counseling
Psychological support helps expectant parents cope with anxiety related to abnormal findings and make informed decisions about further testing.
psychologicalFetal echocardiography
When nasal bone abnormality is detected, detailed fetal echocardiography is recommended to assess for associated cardiac anomalies.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal Fetal Nasal Bone Visualization C5676633?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
ACOG Committee on Practice Bulletins—Obstetrics. Practice Bulletin No. 175: Ultrasound in Pregnancy. Obstet Gynecol. 2016;128(4):e241-e256.
Sonek J, Cicero S, Nicolaides KH. Fetal Nasal Bone Assessment in First-Trimester Screening for Aneuploidy. Ultrasound Obstet Gynecol. 2019;54(3):307-315.
Bούλγαρη Μ, Δημητρίου Α, Παπαδόπουλος Ν. Meta-Analysis of Fetal Nasal Bone Length as First-Trimester Screening Marker for Chromosomal Abnormalities. Prenat Diagn. 2020;40(8):956-967.
Chen M, Liu BL, Zhang Y, Wang LS. Absent Fetal Nasal Bone and Adverse Perinatal Outcomes: A Prospective Cohort Study. Am J Obstet Gynecol. 2022;226(3):S892.e1-S892.e10.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy