Genetic predisposition to cancer

Cancer is characterised by excessive and uncontrolled cell growth that invades and damages tissues and organs. It is a multi-factor illness that is caused by a combination of genetic and environmental factors. Most cancers are sporadic, but some 5 to 10% of cancer diagnoses involve a hereditary genetic origin. This means that specific genes, called cancer susceptibility genes, present germ cell abnormalities (found throughout the body) that increase the risk of developing cancer.  It's important to point out that cancer is NOT hereditary, but the predisposition to developing it is. Having genes that are associated with cancer susceptibility simply means you have a higher risk of having the disease, not that you will have cancer for sure. This genetic predisposition can be transmitted from parents to offspring, normally following an autosomal dominant inheritance pattern, meaning that there is a 50% chance of passing the gene to descendants. In some cases, the genetic susceptibility is individual and caused by a combination of multiple genetic differences (a combination of low-risk polymorphisms or allele variants). Identifying a genetic abnormality known to increase the risk of developing cancer in a family allows its members to benefit from early cancer detection and prevention measures, as well as to seek specific, targeted treatments against that type of cancer.

Predisposició genètica al càncer
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 31.01.2022, 13:30
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Essential thrombocythemia

A rare chronic blood disease that is slow to develop.   It is characterised by increased platelet production and is associated with greater risk of thrombosis (clotting) and bleeding. Patients with essential thrombocythemia are usually asymptomatic and it is detected during routine blood tests. There is currently no cure for this condition and treatment is targeted at preventing complications.  It is included within the group of chronic myeloproliferative disorders, which are a type of blood cancer that is slow to develop. Its cause is not known, although there are mutations known to be associated with the condition in 80% of cases. It is not hereditary, but some families may have several members affected by it.

Trombocitèmia essencial a Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 31.01.2022, 13:24
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Cystic fibrosis

Cystic fibrosis is a genetic disorder that affects the lungs, the digestive system and other organs in the body.

Cystic fibrosis affects the cells that produce mucus, sweat and digestive enzymes. Bodily secretions that are usually fluid and not viscous become more viscous. Instead of acting as a lubricant, the viscous secretions form layers, especially in the lung and pancreas.

Patients with cystic fibrosis have a much higher level of salt in their sweat than normal.

Fibrosi quística Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 27.01.2022, 17:53
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Acute leukaemia

Acute leukaemia involves abnormal cell growth in the haematopoietic system characterised by significant proliferation and accumulation of immature cells, firstly in the bone marrow and subsequently in the blood, with a great degree of clinical and biological heterogeneity. Acute leukaemias are clonal proliferations (tumour cells that originate from a single initial cell and accumulate various genetic mutations that result in development of the disease) of altered blood stem cells. In normal circumstances, multipotent stem cells give rise to haematopoietic cells, which give rise to blood cells via a process of cell proliferation and differentiation mediated by the cell’s own mechanisms and by the surrounding tissues. Under normal conditions, blood cells migrate to the blood and tissues and are indispensable for the body to function correctly. 

leucèmia aguda Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 31.01.2022, 11:18
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Chronic leukaemia

The most common form is chronic myeloid leukaemia and this sheet refers exclusively to this form of leukaemia. It is a form of abnormal cell growth (neoplasia) that originates in immature multipotent blood cells (stem cells) and gives rise to red blood cells, platelets and white blood cells.

It is characterised by cellular proliferation of white blood cells with cytogenetic alteration that consists of the appearance of an abnormal chromosome known as the Philadelphia chromosome. The Philadelphia chromosome is also seen in other processes, such as acute lymphoblastic leukaemia, and diagnostic differentiation is required to distinguish which process is occurring. Chronic myeloid leukaemia may also involve red blood cell and platelet disorders, and is characterised by its chronicity. This disease serves to illustrate the revolution that has taken place in the last few years with targeted therapies in abnormal blood cell growth.

leucèmia crònica Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 31.01.2022, 12:44
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Kidney disease

Kidney disease encompasses a wide range of conditions that compromise the normal functioning of the kidneys. Their main purpose is to purify the blood of different composites, regulate their composition of mineral salts and acidity and contribute to the normal formation and maintenance of bones. They also support the creation of red blood cells and regulate arterial pressure. Kidney disease is characterised by a change in the functions described: higher levels of urea in the blood, excessive potassium or phosphorus, excessive blood acidity, bone pain and anaemia.

Malalties renals a Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 31.01.2022, 14:20
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Hereditary metabolic diseases

Hereditary metabolic diseases (HMDs) are a group of rare genetic disorders. The genetic defect causes a structural alteration in a protein that is involved in one of the metabolic pathways, causing it to block the affected pathway. As a consequence, this causes a build up of substances that may be toxic for the body and a deficiency of others that it needs.

Malalties metabòliques hereditàries a Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 31.01.2022, 13:39
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Pulmonary atresia with ventricular septal defect

Pulmonary atresia with ventricular septal defect is a rare heart condition characterised by a lack of connection between the right ventricle and the pulmonary arteries.

L'atrèsia pulmonar amb comunicació intraventricular a Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 05.01.2023, 09:46
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Hematopoietic Stem Cell Transplant (HPSCT)

Hematopoietic Stem Cell Transplant (HPSCT) is the definitive treatment for many primary immunodeficiency disorders (PID). It is a total replacement of the blood cells in our body. It is also called a bone marrow transplant (BMT).

Trasplantament medul.la òssia Vall d'Hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 30.01.2022, 20:17
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Kidney disease

There are four basic parts to treating renal insufficiency.

Controlling arterial pressure, if it is high; levels of urea; the balance of mineral salts (sodium, potassium, calcium, phosphorus, magnesium); acidity and anaemia. Analytical testing provides a lot of information which enables the origin and severity of the kidney disease to be established.

A kidney biopsy allows a microscopic study that is often essential. Genetic testing also provides very important information.

Trasplantament renal a Vall d'hebron
Authorship: Vall d'Hebron
Creation date: 17.12.2021, 10:03
Modification date: 30.01.2022, 21:41
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