• 24 Mar 2017

    Adrenal Medullary Hyperfunction

    The adrenal medulla symthesizes the catecholamines norepinephrine, epinephrine, and do from the amino acid tyrosine. Norepinephrine, the major catecholamine produced by the adrenal medulla, has ...

  • 23 Mar 2017

    Adrenal Insufficiency

    Glucocorticoid insufficiency can be either primary, resulting from the destruction or dysfunction of the adrenal cortex, or secondary, resulting from ACTH hyposecrrtion. Autoimmune destruction of ...

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  • Adrenal Medullary Hyperfunction 24 Mar

    Adrenal Medullary Hyperfunction

    The adrenal medulla symthesizes the catecholamines norepinephrine, epinephrine, and do from the ...

  • Adrenal Insufficiency 23 Mar

    Adrenal Insufficiency

    Glucocorticoid insufficiency can be either primary, resulting from the destruction or ...

  • GROWTH HORMONE 19 Mar

    GROWTH HORMONE

    GH is a 191-amino acid peptide with a molecular weight of 22,000 d. Secretion is stimulated by ...

  • Thyrotoxicosis Factitia 18 Mar

    Thyrotoxicosis Factitia

    Thyrotoxicosis factitia presents as typical features of thyrotoxicosis from ingestion of ...

  • Chronic Lymphocytic Leukemia 17 Mar

    Chronic Lymphocytic Leukemia

    B-cell CLL is malignant disorder of lymphocytes characterized by expansion and accumulation of ...

  • TESTS OF SERUM THYROID HORMONE LEVELS 16 Mar

    TESTS OF SERUM THYROID HORMONE LEVELS

    Total serum T4 and T3 measure the total amount of hormone bound to thyroid-binding proteins by ...

  • GONADOTROPINS (LH AND FSH) 16 Mar

    GONADOTROPINS (LH AND FSH)

    Gonadotroph secretion is regulated by hypothalamic gonadotropin-releasing hormone(GnRH), a ...

  • BENIGN NEOPLASMS 15 Mar

    BENIGN NEOPLASMS

    The category of benign neoplastic lesions includes hemangioma, hepatocellular, adenoma, nodular ...

  • Marfan’s Syndrome 15 Mar

    Marfan’s Syndrome

    Marfan’s syndrome, long incorrectly thought secondary to a collagen abnormality, is ...

  • PORPHYRIA CUTANEA TARDA 14 Mar

    PORPHYRIA CUTANEA TARDA

    Several thousand cases of porphyria cutanea tarda(PCT) have been identified, but accurate ...

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  • The adrenal medulla symthesizes the catecholamines norepinephrine, epinephrine, and do from the amino acid tyrosine. Norepinephrine, the major catecholamine produced by the adrenal medulla, has predominantly a-agonist actions, causing vasoconstriction. Epinephrine acts primarily on the B receptors, having positive inotropic and chronotropic effects on the heart, causing peripheral vasodilation, and increasing plasma glucose concentrations in...

  • Glucocorticoid insufficiency can be either primary, resulting from the destruction or dysfunction of the adrenal cortex, or secondary, resulting from ACTH hyposecrrtion. Autoimmune destruction of the adrenal glands(Addison’s disease) is the most common cause of primary adrenal insufficiency in the industrialized world, accounting for about 65% of cases. Both glucocorticoid and mineralocorticoid secretion are diminished...

  • GH is a 191-amino acid peptide with a molecular weight of 22,000 d. Secretion is stimulated by the 44-amino acid hypothalamic growth hormone-releasing hormone(GHRH) inhibited by the h thalamic tetradecapeptide somatostatin. These hypothalamic factors bind to pituitary somatotroph cells and regulate GH secretion. binds to receptors in the liver and induces insulin-like growth factor i(IGF-1),...

  • Thyrotoxicosis factitia presents as typical features of thyrotoxicosis from ingestion of excessive amounts of thyroxine, often in an attempt to lose weight. Serum T3 and T4 levels are elevated, and TSH is suppressed, as is the serum thyroglobulin concentration. Radioactive iodine uptake is absent. Patients may require psychotherapy. Struma ovarii occurs when an ovarian teratoma...

  • B-cell CLL is malignant disorder of lymphocytes characterized by expansion and accumulation of small lymphocytes of B-cell origin. CLL is essentially identical to B-cell small lymphocytic lymphoma in the REAL and WF classifications. CLL is the most common form of in the States and affects twice as many men as women. Although it can occur...