sarnsrun/medquad huggingface dataset:
Topic: Lujan syndrome
Question: What is (are) Lujan syndrome ?
Answer: Lujan syndrome is a condition characterized by intellectual disability, behavioral problems, and certain physical features. It occurs almost exclusively in males.  The intellectual disability associated with Lujan syndrome is usually mild to moderate. Behavioral problems can include hyperactivity, aggressiveness, extreme shyness, and excessive attention-seeking. Some affected individuals have features of autism or related developmental disorders affecting communication and social interaction. A few have been diagnosed with psychiatric problems such as delusions and hallucinations.  Characteristic physical features of Lujan syndrome include a tall, thin body and an unusually large head (macrocephaly). Affected individuals also have a long, thin face with distinctive facial features such as a prominent top of the nose (high nasal root); a short space between the nose and the upper lip (philtrum); a narrow roof of the mouth (palate); crowded teeth; and a small chin (micrognathia). Almost all people with this condition have weak muscle tone (hypotonia).  Additional signs and symptoms of Lujan syndrome can include abnormal speech, heart defects, and abnormalities of the genitourinary system. Many affected individuals have long fingers and toes with an unusually large range of joint movement (hyperextensibility). Seizures and abnormalities of the tissue that connects the left and right halves of the brain (corpus callosum) have also been reported in people with this condition.
Source: GHR
Topic: Lujan syndrome
Question: How many people are affected by Lujan syndrome ?
Answer: Lujan syndrome appears to be an uncommon condition, but its prevalence is unknown.
Source: GHR
Topic: Lujan syndrome
Question: What are the genetic changes related to Lujan syndrome ?
Answer: Lujan syndrome is caused by at least one mutation in the MED12 gene. This gene provides instructions for making a protein that helps regulate gene activity; it is involved in many aspects of early development. The MED12 gene mutation that causes Lujan syndrome changes a single protein building block (amino acid) in the MED12 protein. This genetic change alters the structure, and presumably the function, of the MED12 protein. However, it is unclear how the mutation affects development and leads to the cognitive and physical features of Lujan syndrome.
Source: GHR
Topic: Lujan syndrome
Question: Is Lujan syndrome inherited ?
Answer: This condition is inherited in an X-linked recessive pattern. The gene associated with this condition is located on the X chromosome, which is one of the two sex chromosomes. In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. In females (who have two X chromosomes), a mutation would have to occur in both copies of the gene to cause the disorder. Because it is unlikely that females will have two altered copies of this gene, males are affected by X-linked recessive disorders much more frequently than females. A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons.
Source: GHR
Topic: Lujan syndrome
Question: What are the treatments for Lujan syndrome ?
Answer: These resources address the diagnosis or management of Lujan syndrome:  - Gene Review: Gene Review: MED12-Related Disorders  - Genetic Testing Registry: X-linked mental retardation with marfanoid habitus syndrome   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
Source: GHR
Topic: Amish lethal microcephaly
Question: What is (are) Amish lethal microcephaly ?
Answer: Amish lethal microcephaly is a disorder in which infants are born with a very small head and underdeveloped brain.  Infants with Amish lethal microcephaly have a sloping forehead and an extremely small head size. They may also have an unusually small lower jaw and chin (micrognathia) and an enlarged liver (hepatomegaly).  Affected infants may have seizures and difficulty maintaining their body temperature. Often they become very irritable starting in the second or third month of life. A compound called alpha-ketoglutaric acid can be detected in their urine (alpha-ketoglutaric aciduria), and during episodes of viral illness they tend to develop elevated levels of acid in the blood and tissues (metabolic acidosis). Infants with this disorder typically feed adequately but do not develop skills such as purposeful movement or the ability to track faces and sounds. Affected infants live only about six months.
Source: GHR
Topic: Amish lethal microcephaly
Question: How many people are affected by Amish lethal microcephaly ?
Answer: Amish lethal microcephaly occurs in approximately 1 in 500 newborns in the Old Order Amish population of Pennsylvania. It has not been found outside this population.
Source: GHR
Topic: Amish lethal microcephaly
Question: What are the genetic changes related to Amish lethal microcephaly ?
Answer: Mutations in the SLC25A19 gene cause Amish lethal microcephaly.  The SLC25A19 gene provides instructions for producing a protein that is a member of the solute carrier (SLC) family of proteins. Proteins in the SLC family transport various compounds across the membranes surrounding the cell and its component parts. The protein produced from the SLC25A19 gene transports a molecule called thiamine pyrophosphate into the mitochondria, the energy-producing centers of cells. This compound is involved in the activity of a group of mitochondrial enzymes called the dehydrogenase complexes, one of which is the alpha-ketoglutarate dehydrogenase complex. The transport of thiamine pyrophosphate into the mitochondria is believed to be important in brain development.  All known individuals with Amish lethal microcephaly have a mutation in which the protein building block (amino acid) alanine is substituted for the amino acid glycine at position 177 of the SLC25A19 protein, written as Gly177Ala or G177A. Researchers believe that this mutation interferes with the transport of thiamine pyrophosphate into the mitochondria and the activity of the alpha-ketoglutarate dehydrogenase complex, resulting in the abnormal brain development and alpha-ketoglutaric aciduria seen in Amish lethal microcephaly.
Source: GHR
Topic: Amish lethal microcephaly
Question: Is Amish lethal microcephaly inherited ?
Answer: This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Source: GHR
Topic: Amish lethal microcephaly
Question: What are the treatments for Amish lethal microcephaly ?
Answer: These resources address the diagnosis or management of Amish lethal microcephaly:  - Gene Review: Gene Review: Amish Lethal Microcephaly  - Genetic Testing Registry: Amish lethal microcephaly  - MedlinePlus Encyclopedia: Microcephaly   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
Source: GHR
Topic: Shprintzen-Goldberg syndrome
Question: What is (are) Shprintzen-Goldberg syndrome ?
Answer: Shprintzen-Goldberg syndrome is a disorder that affects many parts of the body. Affected individuals have a combination of distinctive facial features and skeletal and neurological abnormalities.  A common feature in people with Shprintzen-Goldberg syndrome is craniosynostosis, which is the premature fusion of certain skull bones. This early fusion prevents the skull from growing normally. Affected individuals can also have distinctive facial features, including a long, narrow head; widely spaced eyes (hypertelorism); protruding eyes (exophthalmos); outside corners of the eyes that point downward (downslanting palpebral fissures); a high, narrow palate; a small lower jaw (micrognathia); and low-set ears that are rotated backward.  People with Shprintzen-Goldberg syndrome are often said to have a marfanoid habitus, because their bodies resemble those of people with a genetic condition called Marfan syndrome. For example, they may have long, slender fingers (arachnodactyly), unusually long limbs, a sunken chest (pectus excavatum) or protruding chest (pectus carinatum), and an abnormal side-to-side curvature of the spine (scoliosis). People with Shprintzen-Goldberg syndrome can have other skeletal abnormalities, such as one or more fingers that are permanently bent (camptodactyly) and an unusually large range of joint movement (hypermobility).  People with Shprintzen-Goldberg syndrome often have delayed development and mild to moderate intellectual disability.  Other common features of Shprintzen-Goldberg syndrome include heart or brain abnormalities, weak muscle tone (hypotonia) in infancy, and a soft out-pouching around the belly-button (umbilical hernia) or lower abdomen (inguinal hernia).  Shprintzen-Goldberg syndrome has signs and symptoms similar to those of Marfan syndrome and another genetic condition called Loeys-Dietz syndrome. However, intellectual disability is more likely to occur in Shprintzen-Goldberg syndrome than in the other two conditions. In addition, heart abnormalities are more common and usually more severe in Marfan syndrome and Loeys-Dietz syndrome.
Source: GHR
Topic: Shprintzen-Goldberg syndrome
Question: How many people are affected by Shprintzen-Goldberg syndrome ?
Answer: Shprintzen-Goldberg syndrome is a rare condition, although its prevalence is unknown. It is difficult to identify the number of affected individuals, because some cases diagnosed as Shprintzen-Goldberg syndrome may instead be Marfan syndrome or Loeys-Dietz syndrome, which have overlapping signs and symptoms.
Source: GHR
Topic: Shprintzen-Goldberg syndrome
Question: What are the genetic changes related to Shprintzen-Goldberg syndrome ?
Answer: Shprintzen-Goldberg syndrome is often caused by mutations in the SKI gene. This gene provides instructions for making a protein that regulates the transforming growth factor beta (TGF-) signaling pathway. The TGF- pathway regulates many processes, including cell growth and division (proliferation), the process by which cells mature to carry out special functions (differentiation), cell movement (motility), and the self-destruction of cells (apoptosis). By attaching to certain proteins in the pathway, the SKI protein blocks TGF- signaling. The SKI protein is found in many cell types throughout the body and appears to play a role in the development of many tissues, including the skull, other bones, skin, and brain.  SKI gene mutations involved in Shprintzen-Goldberg syndrome alter the SKI protein. The altered protein is no longer able to attach to proteins in the TGF- pathway and block signaling. As a result, the pathway is abnormally active. Excess TGF- signaling changes the regulation of gene activity and likely disrupts development of many body systems, including the bones and brain, resulting in the wide range of signs and symptoms of Shprintzen-Goldberg syndrome.  Not all cases of Shprintzen-Goldberg syndrome are caused by mutations in the SKI gene. Other genes may be involved in this condition, and in some cases, the genetic cause is unknown.
Source: GHR
Topic: Shprintzen-Goldberg syndrome
Question: Is Shprintzen-Goldberg syndrome inherited ?
Answer: Shprintzen-Goldberg syndrome is described as autosomal dominant, which means one copy of the altered gene in each cell is sufficient to cause the disorder. The condition almost always results from new (de novo) gene mutations and occurs in people with no history of the disorder in their family. Very rarely, people with Shprintzen-Goldberg syndrome have inherited the altered gene from an unaffected parent who has a gene mutation only in their sperm or egg cells. When a mutation is present only in reproductive cells, it is known as germline mosaicism.
Source: GHR
Topic: Shprintzen-Goldberg syndrome
Question: What are the treatments for Shprintzen-Goldberg syndrome ?
Answer: These resources address the diagnosis or management of Shprintzen-Goldberg syndrome:  - Gene Review: Gene Review: Shprintzen-Goldberg Syndrome  - Genetic Testing Registry: Shprintzen-Goldberg syndrome  - Johns Hopkins Medicine: Diagnosis of Craniosynostosis  - MedlinePlus Encyclopedia: Craniosynostosis   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
Source: GHR
Topic: arrhythmogenic right ventricular cardiomyopathy
Question: What is (are) arrhythmogenic right ventricular cardiomyopathy ?
Answer: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a form of heart disease that usually appears in adulthood. ARVC is a disorder of the myocardium, which is the muscular wall of the heart. This condition causes part of the myocardium to break down over time, increasing the risk of an abnormal heartbeat (arrhythmia) and sudden death.  ARVC may not cause any symptoms in its early stages. However, affected individuals may still be at risk of sudden death, especially during strenuous exercise. When symptoms occur, they most commonly include a sensation of fluttering or pounding in the chest (palpitations), light-headedness, and fainting (syncope). Over time, ARVC can also cause shortness of breath and abnormal swelling in the legs or abdomen. If the myocardium becomes severely damaged in the later stages of the disease, it can lead to heart failure.
Source: GHR
Topic: arrhythmogenic right ventricular cardiomyopathy
Question: How many people are affected by arrhythmogenic right ventricular cardiomyopathy ?
Answer: ARVC occurs in an estimated 1 in 1,000 to 1 in 1,250 people. This disorder may be underdiagnosed because it can be difficult to detect in people with mild or no symptoms.
Source: GHR
Topic: arrhythmogenic right ventricular cardiomyopathy
Question: What are the genetic changes related to arrhythmogenic right ventricular cardiomyopathy ?
Answer: ARVC can result from mutations in at least eight genes. Many of these genes are involved in the function of desmosomes, which are structures that attach heart muscle cells to one another. Desmosomes provide strength to the myocardium and play a role in signaling between neighboring cells.  Mutations in the genes responsible for ARVC often impair the normal function of desmosomes. Without normal desmosomes, cells of the myocardium detach from one another and die, particularly when the heart muscle is placed under stress (such as during vigorous exercise). These changes primarily affect the myocardium surrounding the right ventricle, one of the two lower chambers of the heart. The damaged myocardium is gradually replaced by fat and scar tissue. As this abnormal tissue builds up, the walls of the right ventricle become stretched out, preventing the heart from pumping blood effectively. These changes also disrupt the electrical signals that control the heartbeat, which can lead to arrhythmia.  Gene mutations have been found in 30 to 40 percent of people with ARVC. Mutations in a gene called PKP2 are most common. In people without an identified mutation, the cause of the disorder is unknown. Researchers are looking for additional genetic factors, particularly those involved in the function of desmosomes, that may play a role in causing ARVC.
Source: GHR
Topic: arrhythmogenic right ventricular cardiomyopathy
Question: Is arrhythmogenic right ventricular cardiomyopathy inherited ?
Answer: Up to half of all cases of ARVC appear to run in families. Most familial cases of the disease have an autosomal dominant pattern of inheritance, which means one copy of an altered gene in each cell is sufficient to cause the disorder.  Rarely, ARVC has an autosomal recessive pattern of inheritance, which means both copies of a gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Source: GHR
Topic: arrhythmogenic right ventricular cardiomyopathy
Question: What are the treatments for arrhythmogenic right ventricular cardiomyopathy ?
Answer: These resources address the diagnosis or management of ARVC:  - Brigham and Women's Hospital  - Cleveland Clinic: How Are Arrhythmias Treated?  - Gene Review: Gene Review: Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 1  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 10  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 11  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 12  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 2  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 3  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 4  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 5  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 6  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 7  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 8  - Genetic Testing Registry: Arrhythmogenic right ventricular cardiomyopathy, type 9  - Genetic Testing Registry: Arrhythmogenic right ventricular dysplasia, familial, 11, with mild palmoplantar keratoderma and woolly hair  - St. Luke's-Roosevelt Hospital Center   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
Source: GHR
Topic: malignant hyperthermia
Question: What is (are) malignant hyperthermia ?
Answer: Malignant hyperthermia is a severe reaction to particular drugs that are often used during surgery and other invasive procedures. Specifically, this reaction occurs in response to some anesthetic gases, which are used to block the sensation of pain, and with a muscle relaxant that is used to temporarily paralyze a person during a surgical procedure. If given these drugs, people at risk for malignant hyperthermia may experience muscle rigidity, breakdown of muscle fibers (rhabdomyolysis), a high fever, increased acid levels in the blood and other tissues (acidosis), and a rapid heart rate. Without prompt treatment, the complications of malignant hyperthermia can be life-threatening.  People at increased risk for this disorder are said to have malignant hyperthermia susceptibility. Affected individuals may never know they have the condition unless they undergo testing or have a severe reaction to anesthesia during a surgical procedure. While this condition often occurs in people without other serious medical problems, certain inherited muscle diseases (including central core disease and multiminicore disease) are associated with malignant hyperthermia susceptibility.
Source: GHR
Topic: malignant hyperthermia
Question: How many people are affected by malignant hyperthermia ?
Answer: Malignant hyperthermia occurs in 1 in 5,000 to 50,000 instances in which people are given anesthetic gases. Susceptibility to malignant hyperthermia is probably more frequent, because many people with an increased risk of this condition are never exposed to drugs that trigger a reaction.
Source: GHR
Topic: malignant hyperthermia
Question: What are the genetic changes related to malignant hyperthermia ?
Answer: Variations of the CACNA1S and RYR1 genes increase the risk of developing malignant hyperthermia.  Researchers have described at least six forms of malignant hyperthermia susceptibility, which are caused by mutations in different genes. Mutations in the RYR1 gene are responsible for a form of the condition known as MHS1. These mutations account for most cases of malignant hyperthermia susceptibility. Another form of the condition, MHS5, results from mutations in the CACNA1S gene. These mutations are less common, causing less than 1 percent of all cases of malignant hyperthermia susceptibility.  The RYR1 and CACNA1S genes provide instructions for making proteins that play essential roles in muscles used for movement (skeletal muscles). For the body to move normally, these muscles must tense (contract) and relax in a coordinated way. Muscle contractions are triggered by the flow of certain charged atoms (ions) into muscle cells. The proteins produced from the RYR1 and CACNA1S genes are involved in the movement of calcium ions within muscle cells. In response to certain signals, the CACNA1S protein helps activate the RYR1 channel, which releases stored calcium ions within muscle cells. The resulting increase in calcium ion concentration inside muscle cells stimulates muscle fibers to contract.  Mutations in the RYR1 or CACNA1S gene cause the RYR1 channel to open more easily and close more slowly in response to certain drugs. As a result, large amounts of calcium ions are released from storage within muscle cells. An overabundance of available calcium ions causes skeletal muscles to contract abnormally, which leads to muscle rigidity in people with malignant hyperthermia. An increase in calcium ion concentration within muscle cells also activates processes that generate heat (leading to increased body temperature) and produce excess acid (leading to acidosis).  The genetic causes of several other types of malignant hyperthermia (MHS2, MHS4, and MHS6) are still under study. A form of the condition known as MHS3 has been linked to the CACNA2D1 gene. This gene provides instructions for making a protein that plays an essential role in activating the RYR1 channel to release calcium ions into muscle cells. Although this gene is thought to be related to malignant hyperthermia in a few families, no causative mutations have been identified.
Source: GHR
Topic: malignant hyperthermia
Question: Is malignant hyperthermia inherited ?
Answer: Malignant hyperthermia susceptibility is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to increase the risk of a severe reaction to certain drugs used during surgery. In most cases, an affected person inherits the altered gene from a parent who is also at risk for the condition.
Source: GHR
Topic: malignant hyperthermia
Question: What are the treatments for malignant hyperthermia ?
Answer: These resources address the diagnosis or management of malignant hyperthermia:  - Gene Review: Gene Review: Malignant Hyperthermia Susceptibility  - Genetic Testing Registry: Malignant hyperthermia susceptibility type 1  - Genetic Testing Registry: Malignant hyperthermia susceptibility type 2  - Genetic Testing Registry: Malignant hyperthermia susceptibility type 3  - Genetic Testing Registry: Malignant hyperthermia susceptibility type 4  - Genetic Testing Registry: Malignant hyperthermia susceptibility type 5  - Genetic Testing Registry: Malignant hyperthermia susceptibility type 6  - MedlinePlus Encyclopedia: Malignant Hyperthermia   These resources from MedlinePlus offer information about the diagnosis and management of various health conditions:  - Diagnostic Tests  - Drug Therapy  - Surgery and Rehabilitation  - Genetic Counseling   - Palliative Care
Source: GHR