THYROID DISEASES Flashcards
what antibodies are found in almost all patients with autoimmune hypothyroidism
Thyroglobulin and Thyroid peroxidase (TPO)
what antibodies are the cause of graves diseaes
Thyroid stimulating antibodies
What is the greatest risk factor for Predisposition to thyroid autoimmunity
being Female
-also post partum
what gene could predispose you to thyroid autoimmunity
HLA-DR3
what are the 3 group factors that cause thyroid autoimmunity
Genes
Endogenous
Environment
what are some Autoimmune diseases associated with thyroid autoimmunity (name 5)
** Type 1 diabetes mellitus
** Addison’s disease
* Pernicious anaemia
** Vitiligo
** Alopecia areata
* Coeliac disease/ dermatitis herpetiformis
* Chronic active hepatitis
* Rheumatoid arthritis/ SLE/ Sjogren’s syndrome
* Myasthenia gravis (Graves’ disease)
what causes Thyroid associated ophthalmopathy in graves disease
-**Swelling in extraocular muscles **is likely due to an autoantigen in the extraocular muscle that cross reacts with, or is identical to, a thyroid autoantigen
what is a Goiter
lump or swelling at the front of the neck caused by a swollen thyroid
Define HYPERTHYROIDISM and list 3 mechanisms for increased levels:
-
Excess of thyroid hormones in blooda. overproduction thyroid hormone
b. leakage of preformed hormone from
thyroid
c. ingestion of excess thyroid hormone
What are common causes of hyperthyroidism
- Graves’ disease (75- 80% of all cases)
- Toxic multinodular goitre
- Toxic adenoma
List some drugs that could induce hyperthyroidism
- Iodine
- Amiodarone
- Lithium
- Radiocontrast agents (contains large doises of iodine)
List CLINICAL FEATURES of hyperthyroidism
Weight loss
Tachycardia
Anxiety
Tremor
Hyperphagia
Heat intolerance
sweating
Diarrhoea
Lid lag + stare
Menstrual disturbance
what condition matches the following** clinical features:**
- Diffuse goitre
- Thyroid eye disease (infiltrative)
- Pretibial myxoedema
- Acropachy
Graves
Which antibodies are responsible for graves
**Thyroid-stimulating autoantibodies **(TSAb’s) that activate the thyrotropin receptor (TSHR).
what is the name of these symptoms and the hyperthyyroid condition
Image
Thyroid eye disease - Graves
(some will have forwards protrusion and others posterior (compressing optic nerve))