ENDOCRINOLOGY by Dr Cinitia Flashcards
Hypothyroidism (Hashimoto Thyroiditis) CLINICAL FEATURES
Bilateral, firm, rubbery goitre
Hypothyroidism (Hashimoto Thyroiditis) FIRST INVESTIGATION (3):
- TSH
- US If nodule
- CT Scan if goitre is causing compression
Hypothyroidism (Hashimoto Thyroiditis) BEST INVESTIGATION (3):
1.Antithyroglobulin (TgAb)
2.Antithyroid peroxidase Ab (TPO)
3.Biopsy: Chronic lymphocytic thyroiditis
Hypothyroidism (Hashimoto Thyroiditis) TREATMENT
- Tx if TSH>7.
Monitor tx at 3m, 6m, 1y. You start with low dose and you increase it progressively.
Myxedema coma CLINICAL FEATURES
Hypotension, hypoventilation, hypoglycaemia, hyponatraemia
Myxedema coma TREATMENT
IV Levothyroxine + IV hydrocortisone
Congenital hypothyroidism CLINICAL FEATURES
Macroglossia, harsh cry, dry skin, umbilical hernia
Congenital hypothyroidism FIRST INVESTIGATION
Neonatal Heel prick TSH is (NEXT) if hypotonic kid with large open ant fontanelle
Congenital hypothyroidism TREATMENT
Start thyroxine before 2 weeks of age
Subclinical hypothyroidism CLINICAL FEATURES
High TSH and normal T3, T4
Subclinical hypothyroidism FIRST INVESTIGATION
TSH
Subclinical hypothyroidism TREATMENT
- TSH 5-10: Review TSH in 3 months
- TSH>10: Levothyroxine
Sick Euthyroid Syndrome CLINICAL FEATURES
Decrease conversion from T4 to T3 so T3 will be low and T4, TSH, and reverse T3 could be normal or even high
Hyperthyroidism CLINICAL FEATURES
Fine tremor, proximal myopathy, frozen shoulder
Hyperthyroidism FIRST INVESTIGATION
- TSH
- Radioactive iodine uptake: -
Low uptake: Thyroiditis -
High uptake:
Homogeneous (Graves), heterogenous (multiple- toxic multinodular goitre, single area-toxic adenoma)
Hyperthyroidism TREATMENT (4)
1.Carbimazole (Agranulocytosis)
2.Propylthiouracil (Risk of liver dx)
3.Surgery
4.Radioactive iodine (If CIs to surgery)
Graves Disease FIRST INVESTIGATION
TSH
Graves Disease BEST INVESTIGATION
TSH receptor antibody, anti- TPO
Graves Disease TREATMENT
Same than above + Tx of vision threatened:
1. IV Methylprednisolone
2. Oral high dose prednisolone
Hyperthyroidism in pregnancy TREATMENT
- Propylthiouracil in 1st trimester
- Carbimazole in 2nd/3rd trimester
Subacute thyroiditis (De Quervains) CLINICAL FEATURES
Pain/Tenderness, fever
Subacute thyroiditis (De Quervains) FIRST INVESTIGATION
- TSH
Subacute thyroiditis (De Quervains) BEST INVESTIGATION
- ESR>50mm/Hr
Subacute thyroiditis (De Quervains) TREATMENT
- Analgesia: NSAIDs
- Severe: Oral prednisolone.
- If constitutional symptoms: BB
NOT antithyroid medication
Thyroid Storm CLINICAL FEATURES
Anxiety, weight loss, hyperpyrexia, tachycardia
Thyroid Storm TREATMENT
Hospital admission: IV saline, IV steroids
Thyroid Nodule CLINICAL FEATURES
Moves with swallowing, can cause compression.
Thyroid Nodule FIRST INVESTIGATION
- TSH -TSH Normal or
High: Next: US. Next: FNA -TSH
Low: Next T3 & T4. Next: Radioisotope scan and US. If cold nodule: FNA
Thyroid Nodule BEST INVESTIGATION
- FNAC
Retrosternal Goitre CLINICAL FEATURES
Compression
Retrosternal Goitre FIRST INVESTIGATION
- X-ray
Retrosternal Goitre BEST INVESTIGATION
CT of neck and upper chest
Retrosternal Goitre TREATMENT
Total thyroidectomy
Thyroid Cancer CLINICAL FEATURES (4)
-Hoarseness
-Psammoma bodies: PapillaryThyroid Ca
-Follicular cells: always do excisional biopsy bc it’s hard to diff between non and carcinoma. - Parafollicular C cells (secrete calcitonin): Medullary thyroid Ca. MEN2.
-Rapidly growing: Anaplastic
Thyroid Cancer FIRST INVESTIGATION
- TFT
Thyroid Cancer BEST INVESTIGATION
- FNAB
Hyperparathyroidism CLINICAL FEATURES
HyperCalcaemia (Stones, polyuria, hypoPh, constipation, psych disturbance)
Hyperparathyroidism FIRST INVESTIGATION
- Ca
Hyperparathyroidism BEST INVESTIGATION
- PTH
Hyperparathyroidism TREATMENT
Qx for Ca<0.25, nephrolithiasis, bone erosions, reduction in bone mass, reduction of Cr clearance.
Diabetes Mellitus Type 1 FIRST INVESTIGATION (2)
Urine Dipstick for sugar.
Other: Abs against Hashimoto
Diabetes Mellitus Type 1 BEST INVESTIGATION
FSB
Diabetes Mellitus Type 1 TREATMENT (4)
- Admission
- Insulin
- Follow up w/ HbA1c e/3m (<7%)
- Vaccine for Pneumococcal, Influenza, and dTPa
Diabetes Mellitus Type 2 FIRST INVESTIGATION
RBG≥11.1
Diabetes Mellitus Type 2 BEST INVESTIGATION
FBG:
- If ≥7: DM
- If 5.5-6.9->OGTT. If
OGTT≥11.1: DM, if 7.8-11
Retest in a year, if <7.8 with
FBG 6.1-6.9 retest in a year, OGTT≤7.7 Retest in 3 years - HbA1c: ≥6.5: DM, 6-6.4: retest in 1y, ≤5.9 retest in 3
years
Diabetes Mellitus Type 2 TREATMENT (5):
1.Lifestyle modifications for 3-6m
2.Metformin
3.Metformin+Sulfonilurias or acarbose
4.Insulin (If HbA1c>9%)
5.Follow-up with HbA1c e/3m (<7) except in risk of hypoglycaemia (7-8)
- Pioglitazone - bladder Ca
- Rosiglitazone-HF
Diabetic Nephropathy TREATMENT (2)
Annual screening for albuminuria
Photocoagulation
Diabetic Retinopathy FIRST INVESTIGATION
Screening e/2y.
- If nonproliferative dx: e/1y
- If proliferative dx: Urgent referral
- If vitreous
hemorrhage: Same day referral
Diabetic Retinopathy TREATMENT
Photocoagulation
Diabetic Neuropathy FIRST INVESTIGATION
- Check Vitamin B12 levels (Metformin can decrease them)
Diabetic Neuropathy TREATMENT
- Amitriptyline
- Gabapentin/Pregabalin
Diabetic Ketoacidosis CLINICAL FEATURES
MCC: Infections, HypoK, HypoNa, ketones
Diabetic Ketoacidosis FIRST INVESTIGATION
MCC: Infections, HypoK, HypoNa, ketones
Diabetic Ketoacidosis BEST INVESTIGATION
Ketones in serum or urine
Diabetic Ketoacidosis TREATMENT (2)
- Rehydration (NS IV 15-20mL/kg)
- Short acting insulin IV
Hypoglycaemia CLINICAL FEATURES
Early dumping: 30 mins-1hr: Tx diet
Late dumping:1-3 hrs after meals
Hypoglycaemia TREATMENT
Conscious:
-<1yr: Milk, >1yr something sweet Unconscious: If Glucose<3
-Children: 10% dextrose
-Adults: 50% Dextrose
Next: IM Glucagon
Hyperglycaemic hyperosmolar nonketotic Coma CLINICAL FEATURES
Glucose >33 with normal ketones
Hyperglycaemic hyperosmolar nonketotic Coma TREATMENT (2)
- Rehydration (NS 0.45%)
- Insulin with caution
Addison’s dx CLINICAL FEATURES
Hypotension, weakness, fatigue, HypoNa, HyperK
Addison’s dx FIRST INVESTIGATION
Cortisol level
Addison’s dx BEST INVESTIGATION
Short synacthen stimulation test
Addison’s dx TREATMENT
- IV line with fluids
- Dx made: Hydrocortisone
- No Dx: Dexamethasone
Hyperaldosteronism CLINICAL FEATURES
Hypertension, HyperNa, HypoK. Renin low if primary. Renin high if secondary
Hyperaldosteronism FIRST INVESTIGATION
Plasma aldosterone and renin.
- Next: Adrenal CT if primary
Hyperaldosteronism TREATMENT (2)
- Spironolactone/Amiloride
- Surgery to remove adenoma
Cushing Syndrome CLINICAL FEATURES
Hyperglycaemia, Hypertension, amenorrhoea, weakness, obesity, HyperNa, HypoK
Cushing Syndrome FIRST INVESTIGATION (3)
- 24-hour cortisol
- Early morning cortisol levels following a low dose dexamethasone suppression test
- ATCH
Cushing Syndrome BEST INVESTIGATION
- High dose dexamethasone suppression test. 2. Cranial CT/MRI
Cushing Syndrome TREATMENT
Surgery. Give steroids if ACTH is supressed
Pheochromocytoma CLINICAL FEATURES
Headache, palpitations, diaphoresis
Pheochromocytoma FIRST INVESTIGATION
- 24-hour free catecholamines (increased VMA)
Pheochromocytoma BEST INVESTIGATION
- Plasma metanephrines +MRI
Pheochromocytoma TREATMENT (3)
- Alpha Blockers (Phenoxybenzamine)
- BB
- Qx
Adrenal Tumours TREATMENT
- <4cm and benign: Follow up in 3-6m - ≥4cm and suspicious: Adrenalectomy
Pituitary Tumour FIRST INVESTIGATION (2)
- TFT
- CT
Pituitary Tumour BEST INVESTIGATION
- MRI
Pituitary Tumour TREATMENT
-If <1cm: Review in 1y
-If ≥1cm: with visual field symptoms: Transphenoidal resection
Hyperprolactinaemia CLINICAL FEATURES
Reduced libido, amenorrhoea, erectile dysfunction
Hyperprolactinaemia FIRST INVESTIGATION
- Prolactin:
- >5000: Prolactinoma
- <5000: other causes
Hyperprolactinaemia BEST INVESTIGATION
- MRI
Hyperprolactinaemia TREATMENT (2)
1.Dopamine agonist (Cabergoline, bromocriptine)
2.Surgery
Acromegaly CLINICAL FEATURES
Spade like hands, frontal bossing, greasy skin, thickened palms, increased shoe size, heteronymous hemianopia
Acromegaly FIRST INVESTIGATION
- IGF-1.
- Measurement of GH following OGTT. If GH is no supressed by glucose, acromegaly
Acromegaly BEST INVESTIGATION
Pituitary MRI
Diabetes Insipidus CLINICAL FEATURES
Low ADH, HyperNa, HypoK
Diabetes Insipidus FIRST INVESTIGATION
- Plasma Na and osmolality
Diabetes Insipidus BEST INVESTIGATION
Water deprivation test: - In primary polydipsia osmolarity will go back to normal. Desmopressin administration to see if its central (Osm increases) or nephrogenic
Diabetes Insipidus TREATMENT
1.Central: Desmopressin
2.Nephrogenic: Solute restriction and thiazides
SIADH CLINICAL FEATURES
High ADH, HypoNa, concentrated urine. Caused by SSRI, morphine, surgery, etc
SIADH FIRST INVESTIGATION
- Plasma Na and osmolality
SIADH TREATMENT (3)
1.Water restriction
2.Hypertonic saline if pt is severely symptomatic.
3. Demeclocycline