Question: What is (are) Chromosome 4q deletion ?
Answer: Chromosome 4q deletion is a chromosome abnormality that affects many different parts of the body. People with this condition are missing genetic material located on the long arm (q) of chromosome 4 in each cell. The severity of the condition and the associated signs and symptoms vary based on the size and location of the deletion and which genes are involved. Common features shared by many people with this deletion include distinctive craniofacial features, skeletal abnormalities, heart defects, intellectual disability, developmental delay, and short stature. Most cases are not inherited, although affected people can pass the deletion on to their children. Treatment is based on the signs and symptoms present in each person.
Source: GARD

Question: What are the symptoms of Chromosome 4q deletion ?
Answer: What are the signs and symptoms of chromosome 4q deletion? The signs and symptoms of chromosome 4q deletion vary significantly depending on the size and location of the deletion and which genes are involved. Common features that may be shared by affected people include: Distinctive craniofacial features such as a depressed nasal bridge, cleft lip/palate, and micrognathia Skeletal abnormalities including hip dysplasia and malformations of the fingers, toes, or limbs (arms/legs) Heart defects and/or arrhythmias Hypotonia (reduced muscle tone) Seizures Short stature Developmental delay Intellectual disability Metabolic disorders Gastrointestinal problems Kidney abnormalities
Source: GARD

Question: What causes Chromosome 4q deletion ?
Answer: What causes chromosome 4q deletion? People with chromosome 4q deletion are missing genetic material located on the long arm (q) of chromosome 4 in each cell. Scientists suspect that many of the features seen in people affected by this condition are caused by the deletion and/or disruption of certain genes found on 4q. The severity of the condition and the associated signs and symptoms vary depending on the size and location of the deletion and which genes are involved. For example, deletion of the following genes may contribute to the features seen in some affected people: BMP3 - skeletal abnormalities and short stature SEC31A - distinctive craniofacial features PKD2 - kidney abnormalities GRID2, NEUROG2 - neurological problems such as seizures, hypotonia, and delayed motor development (i.e. sitting up, walking, etc) ANK2, HAND2 - heart defects and/or arrhythmias FGF2 - limb (arms and legs) abnormalities Researchers are working to learn more about the other genes on 4q that may contribute to the features seen in people with a chromosome 4q deletion.
Source: GARD

Question: Is Chromosome 4q deletion inherited ?
Answer: How is chromosome 4q deletion inherited? Chromosome 4q deletion is usually not inherited. The deletion often occurs sporadically as a random event during the formation of the egg or sperm. In this case, a person would have no family history of the condition but could pass the deletion on to children. Rarely, this deletion is passed down from parent to child. However, the symptoms and severity can vary between family members.
Source: GARD

Question: How to diagnose Chromosome 4q deletion ?
Answer: How is chromosome 4q deletion diagnosed? There are several different specialized tests that can be used to diagnose a chromosome 4q deletion. These include: Karyotype - a karyotype is a laboratory test that produces an image of a person's chromosomes. This test can be used to diagnose large deletions. FISH - a laboratory technique that is used to detect and locate a specific DNA sequence on a chromosome. During FISH, a chromosome is exposed to a small DNA sequence called a probe that has a fluorescent molecule attached to it. The probe sequence binds to its corresponding sequence on the chromosome. This test can be used in combination with karyotyping for deletions that are too small to be seen on karyotype, alone. However, FISH is only useful if the person ordering the test suspects there is a deletion of a specific region of 4q. Array CGH - a technology that detects deletions that are too small to be seen on karyotype.
Source: GARD