falan42/medcuad_data huggingface dataset:
Topic: desmosterolosis
Question: What is (are) desmosterolosis ?
Answer: Desmosterolosis is a condition that is characterized by neurological problems, such as brain abnormalities and developmental delay, and can also include other signs and symptoms.  Children with desmosterolosis have delayed speech and motor skills (such as sitting and walking). Later in childhood, some affected individuals are able to walk with support; verbal communication is often limited to a few words or phrases. Common brain abnormalities in desmosterolosis include malformation of the tissue that connects the left and right halves of the brain (the corpus callosum) and loss of white matter, which consists of nerve fibers covered by a fatty substance called myelin.  People with desmosterolosis commonly have muscle stiffness (spasticity) and stiff, rigid joints (arthrogryposis) affecting their hands and feet. Other features seen in some affected individuals include short stature, abnormal head size (either larger or smaller than normal), a small lower jaw (micrognathia), an opening in the roof of the mouth (cleft palate), involuntary eye movements (nystagmus) or eyes that do not look in the same direction (strabismus), heart defects, and seizures.
(Source: GHR)
Topic: desmosterolosis
Question: How many people are affected by desmosterolosis ?
Answer: The prevalence of desmosterolosis is unknown; at least 10 affected individuals have been described in the scientific literature.
(Source: GHR)
Topic: desmosterolosis
Question: What are the genetic changes related to desmosterolosis ?
Answer: Desmosterolosis is caused by mutations in the DHCR24 gene. This gene provides instructions for making an enzyme called 24-dehydrocholesterol reductase, which is involved in the production (synthesis) of cholesterol. Cholesterol is a waxy, fat-like substance that can be obtained from foods that come from animals (particularly egg yolks, meat, poultry, fish, and dairy products). It can also be produced in various tissues in the body. For example, the brain cannot access the cholesterol that comes from food, so brain cells must produce their own. Cholesterol is necessary for normal embryonic development and has important functions both before and after birth.  DHCR24 gene mutations lead to the production of 24-dehydrocholesterol reductase with reduced activity. As a result, there is a decrease in cholesterol production. Because the brain relies solely on cellular production for cholesterol, it is most severely affected. Without adequate cholesterol, cell membranes are not formed properly and nerve cells are not protected by myelin, leading to the death of these cells. In addition, a decrease in cholesterol production has more severe effects before birth than during other periods of development because of the rapid increase in cell number that takes place. Disruption of normal cell formation before birth likely accounts for the additional developmental abnormalities of desmosterolosis.
(Source: GHR)
Topic: desmosterolosis
Question: Is desmosterolosis 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: desmosterolosis
Question: What are the treatments for desmosterolosis ?
Answer: These resources address the diagnosis or management of desmosterolosis:  - Genetic Testing Registry: Desmosterolosis   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: 5-alpha reductase deficiency
Question: What is (are) 5-alpha reductase deficiency ?
Answer: 5-alpha reductase deficiency is a condition that affects male sexual development before birth and during puberty. People with this condition are genetically male, with one X and one Y chromosome in each cell, and they have male gonads (testes). Their bodies, however, do not produce enough of a hormone called dihydrotestosterone (DHT). DHT has a critical role in male sexual development, and a shortage of this hormone disrupts the formation of the external sex organs before birth.  Many people with 5-alpha reductase deficiency are born with external genitalia that appear female. In other cases, the external genitalia do not look clearly male or clearly female (sometimes called ambiguous genitalia). Still other affected infants have genitalia that appear predominantly male, often with an unusually small penis (micropenis) and the urethra opening on the underside of the penis (hypospadias).  During puberty, people with this condition develop some secondary sex characteristics, such as increased muscle mass, deepening of the voice, development of pubic hair, and a growth spurt. The penis and scrotum (the sac of skin that holds the testes) grow larger. Unlike many men, people with 5-alpha reductase deficiency do not develop much facial or body hair. Most affected males are unable to father a child (infertile).  Children with 5-alpha reductase deficiency are often raised as girls. About half of these individuals adopt a male gender role in adolescence or early adulthood.
(Source: GHR)
Topic: 5-alpha reductase deficiency
Question: How many people are affected by 5-alpha reductase deficiency ?
Answer: 5-alpha reductase deficiency is a rare condition; the exact incidence is unknown. Large families with affected members have been found in several countries, including the Dominican Republic, Papua New Guinea, Turkey, and Egypt.
(Source: GHR)
Topic: 5-alpha reductase deficiency
Question: What are the genetic changes related to 5-alpha reductase deficiency ?
Answer: Mutations in the SRD5A2 gene cause 5-alpha reductase deficiency. The SRD5A2 gene provides instructions for making an enzyme called steroid 5-alpha reductase 2. This enzyme is involved in processing androgens, which are hormones that direct male sexual development. Specifically, the enzyme is responsible for a chemical reaction that converts the hormone testosterone to DHT. DHT is essential for the normal development of male sex characteristics before birth, particularly the formation of the external genitalia.  Mutations in the SRD5A2 gene prevent steroid 5-alpha reductase 2 from effectively converting testosterone to DHT in the developing reproductive tissues. These hormonal factors underlie the changes in sexual development seen in infants with 5-alpha reductase deficiency.  During puberty, the testes produce more testosterone. Researchers believe that people with 5-alpha reductase deficiency develop secondary male sex characteristics in response to higher levels of this hormone. Some affected people also retain a small amount of 5-alpha reductase 2 activity, which may produce DHT and contribute to the development of secondary sex characteristics during puberty.
(Source: GHR)
Topic: 5-alpha reductase deficiency
Question: Is 5-alpha reductase deficiency inherited ?
Answer: This condition is inherited in an autosomal recessive pattern, which means both copies of the SRD5A2 gene in each cell have mutations. Most often, the parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but do not show signs and symptoms of the condition.  Although people who are genetically female (with two X chromosomes in each cell) may inherit mutations in both copies of the SRD5A2 gene, their sexual development is not affected. The development of female sex characteristics does not require DHT, so a lack of steroid 5-alpha reductase 2 activity does not cause physical changes in these individuals. Only people who have mutations in both copies of the SRD5A2 gene and are genetically male (with one X and one Y chromosome in each cell) have the characteristic signs of 5-alpha reductase deficiency.
(Source: GHR)
Topic: 5-alpha reductase deficiency
Question: What are the treatments for 5-alpha reductase deficiency ?
Answer: These resources address the diagnosis or management of 5-alpha reductase deficiency:  - Genetic Testing Registry: 3-Oxo-5 alpha-steroid delta 4-dehydrogenase deficiency  - MedlinePlus Encyclopedia: Ambiguous Genitalia  - MedlinePlus Encyclopedia: Intersex   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: trisomy 13
Question: What is (are) trisomy 13 ?
Answer: Trisomy 13, also called Patau syndrome, is a chromosomal condition associated with severe intellectual disability and physical abnormalities in many parts of the body. Individuals with trisomy 13 often have heart defects, brain or spinal cord abnormalities, very small or poorly developed eyes (microphthalmia), extra fingers or toes, an opening in the lip (a cleft lip) with or without an opening in the roof of the mouth (a cleft palate), and weak muscle tone (hypotonia). Due to the presence of several life-threatening medical problems, many infants with trisomy 13 die within their first days or weeks of life. Only five percent to 10 percent of children with this condition live past their first year.
(Source: GHR)
Topic: trisomy 13
Question: How many people are affected by trisomy 13 ?
Answer: Trisomy 13 occurs in about 1 in 16,000 newborns. Although women of any age can have a child with trisomy 13, the chance of having a child with this condition increases as a woman gets older.
(Source: GHR)
Topic: trisomy 13
Question: What are the genetic changes related to trisomy 13 ?
Answer: Most cases of trisomy 13 result from having three copies of chromosome 13 in each cell in the body instead of the usual two copies. The extra genetic material disrupts the normal course of development, causing the characteristic features of trisomy 13.  Trisomy 13 can also occur when part of chromosome 13 becomes attached (translocated) to another chromosome during the formation of reproductive cells (eggs and sperm) or very early in fetal development. Affected people have two normal copies of chromosome 13, plus an extra copy of chromosome 13 attached to another chromosome. In rare cases, only part of chromosome 13 is present in three copies. The physical signs and symptoms in these cases may be different than those found in full trisomy 13.  A small percentage of people with trisomy 13 have an extra copy of chromosome 13 in only some of the body's cells. In these people, the condition is called mosaic trisomy 13. The severity of mosaic trisomy 13 depends on the type and number of cells that have the extra chromosome. The physical features of mosaic trisomy 13 are often milder than those of full trisomy 13.
(Source: GHR)
Topic: trisomy 13
Question: Is trisomy 13 inherited ?
Answer: Most cases of trisomy 13 are not inherited and result from random events during the formation of eggs and sperm in healthy parents. An error in cell division called nondisjunction results in a reproductive cell with an abnormal number of chromosomes. For example, an egg or sperm cell may gain an extra copy of chromosome 13. If one of these atypical reproductive cells contributes to the genetic makeup of a child, the child will have an extra chromosome 13 in each cell of the body.  Translocation trisomy 13 can be inherited. An unaffected person can carry a rearrangement of genetic material between chromosome 13 and another chromosome. These rearrangements are called balanced translocations because there is no extra material from chromosome 13. A person with a balanced translocation involving chromosome 13 has an increased chance of passing extra material from chromosome 13 to their children.
(Source: GHR)
Topic: trisomy 13
Question: What are the treatments for trisomy 13 ?
Answer: These resources address the diagnosis or management of trisomy 13:  - Genetic Testing Registry: Complete trisomy 13 syndrome  - MedlinePlus Encyclopedia: Trisomy 13   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: cone-rod dystrophy
Question: What is (are) cone-rod dystrophy ?
Answer: Cone-rod dystrophy is a group of related eye disorders that causes vision loss, which becomes more severe over time. These disorders affect the retina, which is the layer of light-sensitive tissue at the back of the eye. In people with cone-rod dystrophy, vision loss occurs as the light-sensing cells of the retina gradually deteriorate.  The first signs and symptoms of cone-rod dystrophy, which often occur in childhood, are usually decreased sharpness of vision (visual acuity) and increased sensitivity to light (photophobia). These features are typically followed by impaired color vision (dyschromatopsia), blind spots (scotomas) in the center of the visual field, and partial side (peripheral) vision loss. Over time, affected individuals develop night blindness and a worsening of their peripheral vision, which can limit independent mobility. Decreasing visual acuity makes reading increasingly difficult and most affected individuals are legally blind by mid-adulthood. As the condition progresses, individuals may develop involuntary eye movements (nystagmus).  There are more than 30 types of cone-rod dystrophy, which are distinguished by their genetic cause and their pattern of inheritance: autosomal recessive, autosomal dominant, or X-linked (each of which is described below). Additionally, cone-rod dystrophy can occur alone without any other signs and symptoms or it can occur as part of a syndrome that affects multiple parts of the body.
(Source: GHR)
Topic: cone-rod dystrophy
Question: How many people are affected by cone-rod dystrophy ?
Answer: Cone-rod dystrophy is estimated to affect 1 in 30,000 to 40,000 individuals.
(Source: GHR)
Topic: cone-rod dystrophy
Question: What are the genetic changes related to cone-rod dystrophy ?
Answer: Mutations in approximately 30 genes are known to cause cone-rod dystrophy. Approximately 20 of these genes are associated with the form of cone-rod dystrophy that is inherited in an autosomal recessive pattern. Mutations in the ABCA4 gene are the most common cause of autosomal recessive cone-rod dystrophy, accounting for 30 to 60 percent of cases. At least 10 genes have been associated with cone-rod dystrophy that is inherited in an autosomal dominant pattern. Mutations in the GUCY2D and CRX genes account for about half of these cases. Changes in at least two genes cause the X-linked form of the disorder, which is rare.  The genes associated with cone-rod dystrophy play essential roles in the structure and function of specialized light receptor cells (photoreceptors) in the retina. The retina contains two types of photoreceptors, rods and cones. Rods are needed for vision in low light, while cones provide vision in bright light, including color vision.  Mutations in any of the genes associated with cone-rod dystrophy lead to a gradual loss of rods and cones in the retina. The progressive degeneration of these cells causes the characteristic pattern of vision loss that occurs in people with cone-rod dystrophy. Cones typically break down before rods, which is why sensitivity to light and impaired color vision are usually the first signs of the disorder. (The order of cell breakdown is also reflected in the condition name.) Night vision is disrupted later, as rods are lost.  Some of the genes associated with cone-rod dystrophy are also associated with other eye diseases, including a group of related eye disorders called rod-cone dystrophy. Rod-cone dystrophy has signs and symptoms similar to those of cone-rod dystrophy. However, rod-cone dystrophy is characterized by deterioration of the rods first, followed by the cones, so night vision is affected before daylight and color vision. The most common form of rod-cone dystrophy is a condition called retinitis pigmentosa.
(Source: GHR)
Topic: cone-rod dystrophy
Question: Is cone-rod dystrophy inherited ?
Answer: Cone-rod dystrophy is usually 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.  Less frequently, this condition is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. In most of these cases, an affected person has one parent with the condition.  Rarely, cone-rod dystrophy is inherited in an X-linked recessive pattern. The genes associated with this form of the condition are 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. Females with one copy of the altered gene have mild vision problems, such as decreased visual acuity. A characteristic of X-linked inheritance is that fathers cannot pass X-linked traits to their sons.
(Source: GHR)
Topic: cone-rod dystrophy
Question: What are the treatments for cone-rod dystrophy ?
Answer: These resources address the diagnosis or management of cone-rod dystrophy:  - Cleveland Clinic: Eye Examinations: What to Expect  - Genetic Testing Registry: CONE-ROD DYSTROPHY, AIPL1-RELATED  - Genetic Testing Registry: Cone-rod dystrophy  - Genetic Testing Registry: Cone-rod dystrophy 1  - Genetic Testing Registry: Cone-rod dystrophy 10  - Genetic Testing Registry: Cone-rod dystrophy 11  - Genetic Testing Registry: Cone-rod dystrophy 12  - Genetic Testing Registry: Cone-rod dystrophy 13  - Genetic Testing Registry: Cone-rod dystrophy 15  - Genetic Testing Registry: Cone-rod dystrophy 16  - Genetic Testing Registry: Cone-rod dystrophy 17  - Genetic Testing Registry: Cone-rod dystrophy 18  - Genetic Testing Registry: Cone-rod dystrophy 19  - Genetic Testing Registry: Cone-rod dystrophy 2  - Genetic Testing Registry: Cone-rod dystrophy 20  - Genetic Testing Registry: Cone-rod dystrophy 21  - Genetic Testing Registry: Cone-rod dystrophy 3  - Genetic Testing Registry: Cone-rod dystrophy 5  - Genetic Testing Registry: Cone-rod dystrophy 6  - Genetic Testing Registry: Cone-rod dystrophy 7  - Genetic Testing Registry: Cone-rod dystrophy 8  - Genetic Testing Registry: Cone-rod dystrophy 9  - Genetic Testing Registry: Cone-rod dystrophy X-linked 3  - Genetic Testing Registry: Cone-rod dystrophy, X-linked 1  - MedlinePlus Encyclopedia: Color Vision Test  - MedlinePlus Encyclopedia: Visual Acuity Test  - MedlinePlus Encyclopedia: Visual Field Test   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: 8p11 myeloproliferative syndrome
Question: What is (are) 8p11 myeloproliferative syndrome ?
Answer: 8p11 myeloproliferative syndrome is a blood cancer that involves different types of blood cells. Blood cells are divided into several groups (lineages) based on the type of early cell from which they are descended. Two of these lineages are myeloid cells and lymphoid cells. Individuals with 8p11 myeloproliferative syndrome can develop both myeloid cell cancer and lymphoid cell cancer.  The condition can occur at any age. It usually begins as a myeloproliferative disorder, which is characterized by a high number of white blood cells (leukocytes). Most affected individuals also have an excess of myeloid cells known as eosinophils (eosinophilia).  In addition to a myeloproliferative disorder, many people with 8p11 myeloproliferative syndrome develop lymphoma, which is a form of blood cancer that involves lymphoid cells. The cancerous lymphoid cells grow and divide in lymph nodes, forming a tumor that enlarges the lymph nodes. In most cases of 8p11 myeloproliferative syndrome, the cancerous cells are lymphoid cells called T cells. Lymphoma can develop at the same time as the myeloproliferative disorder or later.  In most people with 8p11 myeloproliferative syndrome, the myeloproliferative disorder develops into a fast-growing blood cancer called acute myeloid leukemia.  The rapid myeloid and lymphoid cell production caused by these cancers results in enlargement of the spleen and liver (splenomegaly and hepatomegaly, respectively). Most people with 8p11 myeloproliferative syndrome have symptoms such as fatigue or night sweats. Some affected individuals have no symptoms, and the condition is discovered through routine blood tests.
(Source: GHR)
Topic: 8p11 myeloproliferative syndrome
Question: How many people are affected by 8p11 myeloproliferative syndrome ?
Answer: The prevalence of 8p11 myeloproliferative syndrome is unknown. It is thought to be a rare condition.
(Source: GHR)
Topic: 8p11 myeloproliferative syndrome
Question: What are the genetic changes related to 8p11 myeloproliferative syndrome ?
Answer: 8p11 myeloproliferative syndrome is caused by rearrangements of genetic material (translocations) between two chromosomes. All of the translocations that cause this condition involve the FGFR1 gene, which is found on the short (p) arm of chromosome 8 at a position described as p11. The translocations lead to fusion of part of the FGFR1 gene with part of another gene; the most common partner gene is ZMYM2 on chromosome 13. These genetic changes are found only in cancer cells.  The protein normally produced from the FGFR1 gene can trigger a cascade of chemical reactions that instruct the cell to undergo certain changes, such as growing and dividing. This signaling is turned on when the FGFR1 protein interacts with growth factors. In contrast, when the FGFR1 gene is fused with another gene, FGFR1 signaling is turned on without the need for stimulation by growth factors. The uncontrolled signaling promotes continuous cell growth and division, leading to cancer.  Researchers believe the mutations that cause this condition occur in a very early blood cell called a stem cell that has the ability to mature into either a myeloid cell or a lymphoid cell. For this reason, this condition is sometimes referred to as stem cell leukemia/lymphoma.
(Source: GHR)
Topic: 8p11 myeloproliferative syndrome
Question: Is 8p11 myeloproliferative syndrome inherited ?
Answer: This condition is generally not inherited but arises from a mutation in the body's cells that occurs after conception. This alteration is called a somatic mutation.
(Source: GHR)
Topic: 8p11 myeloproliferative syndrome
Question: What are the treatments for 8p11 myeloproliferative syndrome ?
Answer: These resources address the diagnosis or management of 8p11 myeloproliferative syndrome:  - Cancer.Net from the American Society of Clinical Oncology: Acute Myeloid Leukemia Diagnosis  - Cancer.Net from the American Society of Clinical Oncology: Acute Myeloid Leukemia Treatment Options  - Cancer.Net from the American Society of Clinical Oncology: Non-Hodgkin Lymphoma Diagnosis  - Cancer.Net from the American Society of Clinical Oncology: Non-Hodgkin Lymphoma Treatment Options  - Genetic Testing Registry: Chromosome 8p11 myeloproliferative 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)