Endocrinology, breast, urology, renal Flashcards
How does Type 2 Diabetes (T2D) differ from Type 1 Diabetes?
T2D involves decreased insulin secretion and increased insulin resistance, while T1D is characterized by autoimmune destruction of β cells.
What is the underlying cause of Type 1 Diabetes (T1D)?
Insulin deficiency due to autoimmune destruction of pancreatic β cells
What causes Type 2 DM in the young
Maturity-onset diabetes of the young
What are the diagnostic criteria for diabetes based on fasting glucose levels?
≥7 mmol/L.
How is diabetes diagnosed using OGTT (Oral Glucose Tolerance Test)?
A diagnosis is made if glucose levels are ≥11.1 mmol/L.
What level of HbA1c indicates diabetes?
≥48 (6.5%).
Define Prediabetes based on HbA1c.
42-47
What are the symptoms of hypoglycemia?
Sweating, shaking, anxiety, palpitations, hunger, nausea.
What are the symptoms of neuroglycopenia during hypoglycemia?
Confusion, slurred speech, visual disturbances, drowsiness, aggression.
Describe the characteristics of Diabetic Ketoacidosis (DKA).
Common in T1D, with symptoms including gradual drowsiness, vomiting, dehydration, Kussmaul’s respiration, confusion, and tachycardia.
What are the diagnostic criteria for DKA?
Hyperglycemia (>11.0 mmol/L), ketosis (blood ketone >3mmol/L or urine ketone ++), and acidosis (pH <7.3).
Outline the treatment steps for DKA.
Administer 0.9% sodium chloride 500mL boluses, then 1L over specific intervals. Use insulin, monitor glucose and ketone levels.
What is the significance of HbA1c in diabetes diagnosis?
HbA1c provides a 3-month picture of glycemic control
Describe the mode of action of Metformin.
Metformin improves insulin sensitivity in the liver/muscle and suppresses hepatic gluconeogenesis.
What are the side effects of Metformin?
Nausea, diarrhea, and the risk of Metformin-Associated Lactic Acidosis
How does DDP4i (Sitagliptin) work in diabetes treatment?
It increases GLP-1, leading to the ‘incretin effect.’
What side effect is associated with DDP4i (gliptin)?
Pancreatitis and nasopharyngitis.
What is the mechanism of action of Sulfonylurea (Gliclazide)?
It enhances insulin secretion.
What is the primary side effect of Sulfonylureas?
Hypoglycaemia
Explain the action of GLP-1 mimetic (Exenatide injection).
Acts via the ‘incretin effect’ and is given if BMI >35 or >33 (Asian).
What is the preferred long-acting basal insulin in T1D?
Twice-daily insulin detemir.
What is the first intensification step in T2D treatment for HbA1c >58 (7.5%)?
Dual therapy.
What is the primary risk factor for gestational diabetes?
Obesity
What is the role of glucagon in glucose homeostasis?
Glucagon raises blood glucose levels by promoting glycogen breakdown in the liver.
How does chronic kidney disease affect insulin metabolism?
CKD can lead to insulin resistance and altered insulin metabolism
Explain the concept of diabetic nephropathy.
Diabetic nephropathy is kidney damage resulting from diabetes, marked by proteinuria, hypertension, and decreased kidney function.
How is diabetic retinopathy managed?
Management includes regular eye exams, blood sugar control, blood pressure management, and, if necessary, laser therapy or injections
How does smoking affect diabetes?
Smoking increases the risk of diabetes complications, including cardiovascular disease and peripheral vascular disease.
How is diabetic foot ulcers managed?
Management includes wound care, infection control, offloading pressure on the affected area, and, in some cases, surgical intervention.
What is the role of metformin in polycystic ovary syndrome (PCOS)?
Metformin is used in PCOS to improve insulin sensitivity and regulate menstrual cycles
What is the impact of diabetes on the microvasculature?
Diabetes can lead to microvascular complications, including retinopathy, neuropathy, and nephropathy, affecting small blood vessels.
What is the most common type of breast cancer?
Invasive ductal carcinoma is the most common type of breast cancer.
What are the risk factors for breast cancer?
BRCA1 or BRCA2 mutations, family history, previous benign breast disease, smoking, alcohol consumption, and exposure to unopposed estrogen.
Describe the clinical presentation of breast cancer.
Symptoms include a unilateral breast lump (irregular, non-mobile, hard, painless), nipple changes (inversion, Paget’s disease), and skin changes (Peau d’orange).
What is the diagnostic approach for breast cancer?
The triple assessment includes clinical examination, imaging (mammogram), and tissue diagnosis (biopsy).
What are the treatment options for breast cancer involving axillary lymph nodes?
Axillary node clearance is considered. Pre-op ultrasound is done, and if no lymphadenopathy, a negative sentinel node biopsy is performed; if lymphadenopathy is present, axillary node clearance is done.
What hormonal therapy is used for ER-positive pre/peri-menopausal breast cancer?
Tamoxifen
How is breast cancer managed surgically?
Surgery options include wide local excision + radiotherapy for smaller lesions and mastectomy + radiotherapy for larger or more advanced cases.
What hormonal therapy is used for ER-positive post-menopausal breast cancer?
Anastrozole, an aromatase inhibitor,
What is the recommended screening for breast cancer?
Mammograms every 3 years for women aged 47-73 years are recommended.
What are the clinical manifestations of hypothyroidism?
Symptoms include weight gain, cold intolerance, bradycardia, constipation, menorrhagia, and dry skin
Outline the symptoms associated with hyperthyroidism.
Hyperthyroidism symptoms encompass weight loss, heat intolerance, tachycardia, palpitations, diarrhea, and sweating
Compare Graves’ disease and toxic nodular goitre
Graves’ disease is characterized by a diffuse goitre with bruit, exophthalmos, ophthalmoplegia, and thyroid acropachy. Toxic nodular goitre presents as a solitary nodule or multinodular goitre.
What is Subclinical Hyperthyroidism, and when is treatment indicated?
Subclinical hyperthyroidism is usually asymptomatic but carries risks. Treatment is considered if symptomatic, >65y, post-menopausal, or having specific risk factors.
What is the cause of Subacute Thyroiditis/De Quervain’s and how is it managed?
Subacute thyroiditis is often post-viral. Management includes diclofenac for pain relief.
What antibodies are associated with Hashimoto’s thyroiditis?
Anti-TPO
Explain Sick Euthyroid Syndrome.
during systemic illness, leading to low T3/T4 levels despite normal/low TSH.
What is the most common type of thyroid cancer, and who does it commonly affect?
Papillary thyroid cancer is the most common and often affects young females. It has a favorable prognosis
List common drugs used in thyroid disorders and their indications.
Drugs include Carbimazole (hyperthyroidism), Levothyroxine (hypothyroidism), Propranolol (symptomatic control), Prednisolone (anti-inflammatory), Radioiodine (hyperthyroidism or cancer), Thyrotoxic drugs (ATDs, lithium, amiodarone).
Describe Follicular thyroid cancer and its distinguishing features.
Follicular thyroid cancer commonly affects middle-aged individuals
What is Medullary thyroid cancer, and what hormone does it produce?
Medullary thyroid cancer arises from parafollicular cells, produces calcitonin, and can be part of MEN-2a or MEN-2b.
How is thyroid cancer diagnosed, and what is the treatment?
Diagnosis involves blood tests, ultrasound, and fine-needle biopsy. Treatment includes total thyroidectomy, radioiodine, and levothyroxine. Monitoring involves thyroglobulin (Tg) and, if medullary, calcitonin.
What are common causes of midline neck lumps?
Midline neck lumps include goitre and thyroglossal cyst
Common causes of lateral neck lumps
Lymph nodes, branchial cysts, and cystic hygroma.
What movements help differentiate a thyroglossal cyst from other neck lumps?
typically don’t move on swallowing but do move on tongue protrusion.
Explain the term “block-and-replace” in the context of hyperthyroidism treatment.
Block-and-replace” involves simultaneously giving antithyroid drugs (block) and thyroid hormone replacement (replace) to maintain thyroid hormone levels within a normal range.
How does PTH influence calcium and phosphate homeostasis?
PTH increases osteoclast activity, activates vitamin D for GI calcium absorption, and enhances renal calcium reabsorption. It inhibits phosphate reabsorption in the kidneys.
Describe the primary treatment for primary hyperparathyroidism
Parathyroidectomy
What is the primary cause of secondary hyperparathyroidism, and how is it managed?
Chronic kidney disease is a leading cause. Management involves cinacalcet, cholecalciferol, and phosphate binders.
Explain how tertiary hyperparathyroidism differs from secondary hyperparathyroidism.
Tertiary hyperparathyroidism is a long-term form of secondary hyperparathyroidism. Parathyroidectomy is performed after prolonged secondary hyperparathyroidism.
How is hypercalcaemia managed?
Management involves fluids, loop diuretics, bisphosphonates, calcitonin.
What are the characteristics of SIADH?
SIADH is characterized by high ADH and hyponatraemia.
Hypercalcaemia causes
Primary and tertiary hyperparathyroidism, cancer, thiazide diuretics, sarcoidosis, myeloma, and Paget’s disease
What is the treatment approach for SiADH?
fluid restriction and, if necessary, ADH antagonists like demeclocycline.
Differentiate between central diabetes insipidus (CDI) and nephrogenic diabetes insipidus (NDI).
CDI involves reduced ADH secretion, while NDI involves impaired kidney response to ADH.
Compare treatment of Cranial diabetes insipidus and nephrogenic DI
Desmopressin is used to treat CDI, and thiazide diuretics for NDI.
What is the primary cause of Addison’s disease in the UK, and what is the treatment during illness?
utoimmune adrenalitis (Addison’s disease) is the primary cause in the UK. During illness, double the hydrocortisone dose.
What is seen on bloods in Addison’s disease
Hyponatraemia, hyperkalaemia, metabolic acidosis
Cushing’s syndrome diagnosis
Low-dose and high-dose overnight dexamethasone suppression tests and plasma ACTH levels.
What are the common causes of Cushing’s syndrome?
Iatrogenic, adrenal adenoma, pituitary adenoma, ectopic production
What is the leading cause of primary hyperaldosteronism?
Adrenal adenoma (Conn’s syndrome)
Treatment of primary hyperaldosteronism (Conn’s)
Spironolactone +/- adrenalectomy
What is seen on bloods in Conn’s
Hypertension, mild acidosis, hypokalaemia
Outline the diagnosis and treatment of phaeochromocytoma.
Diagnosis involves 24h urinary metanephrines and CT. Treatment includes α-blockers (phenoxybenzamine), β-blockers (propranolol, labetalol), and laparoscopic adrenalectomy.
What is acromegaly, its common cause, and how is it managed?
Acromegaly is characterized by excess growth hormone. Pituitary adenoma is a common cause. Management involves transsphenoidal adenectomy and somatostatin analogues like octreotide.
1st line drugs in prolactinoma
Dopamine agonists like bromocriptine are the primary treatment.