Hereditary paraganglioma-pheochromocytoma
Dernière mise à jour 8 nov. 2023
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Hereditary paraganglioma-pheochromocytoma is an inherited condition characterised by the growth of tumours in structures called paraganglia. Paraganglia are groups of cells that are found near nerve cell bunches called ganglia. A tumour involving the paraganglia is known as a paraganglioma. A type of paraganglioma known as a pheochromocytoma develops in the adrenal glands, which are located on top of each kidney and produce hormones in response to stress. Other types of paraganglioma are usually found in the head, neck, or trunk. People with hereditary paraganglioma-pheochromocytoma develop one or more paragangliomas, which may include pheochromocytomas.
Description
Hereditary paraganglioma-pheochromocytoma is an inherited condition characterised by the growth of tumours in structures called paraganglia. Paraganglia are groups of cells that are found near nerve cell bunches called ganglia. A tumour involving the paraganglia is known as a paraganglioma. A type of paraganglioma known as a pheochromocytoma develops in the adrenal glands, which are located on top of each kidney and produce hormones in response to stress. Other types of paraganglioma are usually found in the head, neck, or trunk. People with hereditary paraganglioma-pheochromocytoma develop one or more paragangliomas, which may include pheochromocytomas.
Pheochromocytomas and some other paragangliomas are associated with ganglia of the sympathetic nervous system. The sympathetic nervous system controls the "fight-or-flight" response, a series of changes in the body due to hormones released in response to stress. Sympathetic paragangliomas found outside the adrenal glands, usually in the abdomen, are called extra-adrenal paragangliomas. Most sympathetic paragangliomas, including pheochromocytomas, produce hormones called catecholamines, such as epinephrine (adrenaline) or norepinephrine. These excess catecholamines can cause signs and symptoms such as high blood pressure (hypertension), episodes of rapid heartbeat (palpitations), headaches, or sweating.
Most paragangliomas are associated with ganglia of the parasympathetic nervous system, which controls involuntary body functions such as digestion and saliva formation. Parasympathetic paragangliomas, typically found in the head and neck, usually do not produce hormones. However, large tumours may cause signs and symptoms such as coughing, hearing loss in one ear, or difficulty swallowing.
Paragangliomas and pheochromocytomas are typically considered an undetermined tumour type, meaning they can be noncancerous (benign) or become cancerous (malignant) and spread to other parts of the body (metastasize). Extra-adrenal paragangliomas become malignant more often than other types of paraganglioma or pheochromocytoma.
Researchers have identified several types of hereditary paraganglioma-pheochromocytoma. Each type is distinguished by its genetic cause. People with types 1, 2, and 3 typically develop paragangliomas in the head or neck region. People with type 4 usually develop extra-adrenal paragangliomas in the abdomen and are at higher risk for malignant tumours that metastasize. The other types are very rare. Hereditary paraganglioma-pheochromocytoma is typically diagnosed in a person's 30s.
Paragangliomas and pheochromocytomas can occur in individuals with other inherited disorders, such as von Hippel-Lindau syndrome, Carney-Stratakis syndrome, and certain types of multiple endocrine neoplasia. These other disorders feature additional tumour types and have different genetic causes. Some paragangliomas and pheochromocytomas occur in people with no history of the tumours in their families and appear not to be inherited. These cases are designated as sporadic.
Inheritance patterns
The source lists the following possible inheritance patterns: Autosomal dominant. More than one pattern can apply in different cases.
Related genes
Other names
Familial paraganglioma syndrome
Familial paraganglioma-pheochromocytoma syndromes
FPGL
FPGL/PHEO
Hereditary paraganglioma-pheochromocytoma syndromes
Hereditary pheochromocytoma-paraganglioma
Paragangliomas 1
Paragangliomas 2
Paragangliomas 3
Paragangliomas 4
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Lectures complémentaires et références
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