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Melnick-Needles syndrome
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Condition

Melnick-Needles syndrome

Melnick-Needles syndrome is a rare genetic disorder characterized by skeletal abnormalities, distinctive facial features, and potential heart or kidney issues.

Overview

Melnick-Needles syndrome is a member of the otopalatodigital spectrum disorders. It is generally the most severe condition in this group, which involves hearing loss, palate development issues, and skeletal abnormalities of the digits.

Symptoms

Individuals with Melnick-Needles syndrome often exhibit the following:

  • Short stature and abnormal spinal curvature.
  • Partial dislocation (subluxation) of joints.
  • Unusually short fingers and toes.
  • Bowed limbs and underdeveloped, irregular ribs that may cause breathing difficulties.
  • Characteristic facial features: prominent brow ridges, excess forehead hair, round cheeks, a very small lower jaw and chin, and misaligned teeth.
  • Facial asymmetry.
  • Hearing loss.
  • Obstruction of the ducts between the kidneys and bladder or heart defects.

Males with the syndrome generally experience much more severe symptoms and often die before or soon after birth.

Causes & Risk Factors

Melnick-Needles syndrome is caused by variants in the FLNA gene, which provides instructions for producing the protein filamin A. This protein helps build the cytoskeleton, the network of filaments that gives structure to cells. The variants associated with this syndrome are "gain-of-function" mutations that enhance the activity of filamin A or give it a new, atypical function, which disrupts processes involved in skeletal development.

Inheritance

This condition is inherited in an X-linked pattern. Because the gene is located on the X chromosome, a variant in one copy of the gene is sufficient to cause the disorder in females. In males, who have only one X chromosome, the variant causes the disorder and is typically more severe. Fathers cannot pass X-linked traits to their sons.

Frequently Asked Questions

Physical therapy focused on strengthening the back and core muscles can help maintain posture and reduce spinal curvature. Orthotic devices, such as custom braces or shoe inserts, can correct limb bowing and improve gait. Speech therapy may assist with feeding difficulties, and occupational therapy can provide adaptive tools for fine‑motor tasks. Regular monitoring by a multidisciplinary team—including orthopedics, cardiology, and genetics—ensures timely adjustments to treatment plans.===
Routine cardiac evaluation—including echocardiography—should be performed at diagnosis and then annually, or sooner if symptoms develop, to detect valve abnormalities or septal defects. Renal imaging (ultrasound or MRI) and urinalysis should be done yearly to identify obstruction of the ureteric ducts or hydronephrosis, as early intervention can prevent kidney damage.
newborn with a small, under‑developed lower jaw (micrognathia), a prominent brow ridge, and short, bowed limbs should raise suspicion. Additionally, if the infant shows abnormal spinal curvature, joint subluxation, or a cleft palate, these features warrant further genetic evaluation for Melnick‑Needles syndrome.
carrier mother has a 50 % chance of passing the mutated FLNA gene to each child. Sons who inherit the mutation will typically exhibit more severe disease, while daughters will usually be affected but may have milder symptoms. Prenatal testing (chorionic villus sampling or amniocentesis) and pre‑implantation genetic diagnosis can help identify affected embryos before pregnancy.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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