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Pathology - Pituitary adenoma
Definition • A benign epithelial neoplasm of the anterior pituitary gland. • The majority are functioning tumors that excessively secrete prolactin, growth hormone (GH), or adrenocorticotropic hormone (ACTH), in that order of prevalence. • Functional adenomas that produce thyroid-stimulating hormone (TSH), follicle-stimulating hormone (FSH), or luteinizing hormone (LH) are exceedingly rare.
Epidemiology: Rare, having an incidence of 1 in 100,000 annually. • Predominantly occur in middle-aged individuals. • Women are more frequently afflicted than males.
Aetiology • Predominantly unknown in most instances. A minor percentage is observed in conjunction with hereditary tumor disorders, such as MEN. 1. Genetics • The two most well-characterized genetic anomalies are MEN 1 and gsp, a mutation in the G-protein alpha subunit.
Presentation • Characteristics of endocrine hyperfunction vary according to the hormone produced, such as galactorrhea and sexual dysfunction in prolactin-secreting cases, acromegaly in growth hormone-secreting instances, or Cushing's syndrome in adrenocorticotropic hormone-secreting scenarios. • Large adenomas can induce mass effect symptoms, including headache, nausea, and visual field disturbances, due to compression of the optic chiasm. • Numerous people may exhibit symptoms and indications of hypopituitarism, but it is infrequently the presenting complaint.
Macroscopy: Pituitary adenomas are soft tumors that can be classified as small microadenomas (less than 10 mm in size) or bigger macroadenomas (greater than 10 mm in size). Histopathology The tumors consist of solid nests or trabeculae of neoplastic cells characterized by homogeneous round nuclei, stippled chromatin, and subtle nucleoli. Immunohistochemistry employing antibodies targeting prolactin, growth hormone, and adrenocorticotropic hormone can be utilized to ascertain the hormone synthesized by the tumor. Prognosis: Generally favorable after suitable medicinal or surgical intervention, although some patients may experience recurrences. 2 The endocrine repercussions of these tumors may, however, yield significant consequences, such as cardiovascular disease in acromegaly.
Definition • A benign epithelial neoplasm of the anterior pituitary gland. • The majority are functioning tumors that excessively secrete prolactin, growth hormone (GH), or adrenocorticotropic hormone (ACTH), in that order of prevalence. • Functional adenomas that produce thyroid-stimulating hormone (TSH), follicle-stimulating hormone (FSH), or luteinizing hormone (LH) are exceedingly rare.
Epidemiology: Rare, having an incidence of 1 in 100,000 annually. • Predominantly occur in middle-aged individuals. • Women are more frequently afflicted than males.
Aetiology • Predominantly unknown in most instances. A minor percentage is observed in conjunction with hereditary tumor disorders, such as MEN. 1. Genetics • The two most well-characterized genetic anomalies are MEN 1 and gsp, a mutation in the G-protein alpha subunit.
Presentation • Characteristics of endocrine hyperfunction vary according to the hormone produced, such as galactorrhea and sexual dysfunction in prolactin-secreting cases, acromegaly in growth hormone-secreting instances, or Cushing's syndrome in adrenocorticotropic hormone-secreting scenarios. • Large adenomas can induce mass effect symptoms, including headache, nausea, and visual field disturbances, due to compression of the optic chiasm. • Numerous people may exhibit symptoms and indications of hypopituitarism, but it is infrequently the presenting complaint.
Macroscopy: Pituitary adenomas are soft tumors that can be classified as small microadenomas (less than 10 mm in size) or bigger macroadenomas (greater than 10 mm in size). Histopathology The tumors consist of solid nests or trabeculae of neoplastic cells characterized by homogeneous round nuclei, stippled chromatin, and subtle nucleoli. Immunohistochemistry employing antibodies targeting prolactin, growth hormone, and adrenocorticotropic hormone can be utilized to ascertain the hormone synthesized by the tumor. Prognosis: Generally favorable after suitable medicinal or surgical intervention, although some patients may experience recurrences. 2 The endocrine repercussions of these tumors may, however, yield significant consequences, such as cardiovascular disease in acromegaly.
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