MDS PREP
"potato tumour" is the
1) Carcinoma thyroid
2) Infected sebaceous cyst
3) Chemodectoma of carotid body
4) Pleomorphic adenoma of parotid
Oral medicine
Answer: 3
The term "potato tumour" is often used to describe a chemodectoma, which is a type of tumor that arises from the chemoreceptor cells of the carotid body. These tumors can be vascular and may have a lobulated appearance, resembling a potato. They are typically benign but can cause symptoms due to their location and pressure effects on surrounding structures.
In a patient with suspected acute coronary syndrome, which of the following ECG changes is most indicative of an ST-elevation myocardial infarction (STEMI)?
1) ST depression in leads II, III, and aVF
2) ST elevation in leads I and aVL
3) ST elevation in leads V1-V4 with reciprocal depression in leads II, III, and aVF
4) ST elevation in leads II, III, and aVF
In a patient with a suspected STEMI, the characteristic ECG findings include ST elevation in the anterolateral leads (I, aVL, V1-V6) and reciprocal ST depression in the inferior leads (II, III, aVF). The pattern of ST elevation in the anterolateral leads with reciprocal depression in the inferior leads is most indicative of a STEMI affecting the anterolateral wall of the heart.
What is the most common risk factor for the development of atherosclerosis?
1) Cigarette smoking
2) High HDL cholesterol
3) Physical inactivity
4) Impaired fasting glucose
Cigarette smoking is a major risk factor for atherosclerosis as it damages the inner lining of the blood vessels, leading to the formation of plaques.
In a patient with a history of chronic obstructive pulmonary disease (COPD), which of the following is NOT a common side effect of long-term inhaled corticosteroid therapy?
1) Oral thrush
2) Pneumonia
3) Osteoporosis
4) Tachycardia
Long-term inhaled corticosteroid therapy is commonly used in COPD management to reduce inflammation and exacerbations. Common side effects include oral thrush, pneumonia due to immunocompromise, and osteoporosis due to steroid-induced bone loss. Tachycardia is not a typical side effect of inhaled corticosteroids.
Antibioma is
1) A tumour of fibrous tissue
2) Granulation tissue mass caused by antibiotics
3) Malignant tumour caused by antibiotics
4) None
Oral medicine
Answer: 2
An antibioma is a localized mass of granulation tissue that forms in response to the presence of antibiotics, often as a result of an infection. It is not a tumor in the traditional sense but rather a reactive tissue response to the antibiotic treatment.
A patient with severe nausea and vomiting is prescribed metoclopramide. What is the primary mechanism of action of metoclopramide?
(1) Antihistaminic action
(2) Dopamine antagonism in the CNS
(3) Muscarinic receptor antagonism
(4) 5-HT3 receptor antagonism
Metoclopramide acts primarily as a dopamine D2 receptor antagonist in the chemoreceptive trigger zone in the brain and in the gastrointestinal tract, which helps to reduce nausea and vomiting by decreasing gastric emptying and increasing gastric tone.
What is the primary risk factor for deep vein thrombosis (DVT) in hospitalized patients?
1) Age over 65
2) Prolonged immobilization
3) Obesity
4) Cancer
Prolonged immobilization, such as during hospitalization or after surgery, is a significant risk factor for the development of DVT. Other risk factors include age over 65, obesity, and cancer, but among hospitalized patients, immobilization is the most common precipitating factor for venous thrombosis.
Which of the following conditions is NOT associated with an increased risk of developing venous thrombosis?
1) Orthopedic surgery
2) Lung cancer
3) Estrogen use for contraception
4) DVT in a family member
While lung cancer itself is not a direct risk factor for venous thrombosis, it can be associated with hypercoagulable states due to the presence of tumor cells or paraneoplastic syndromes. The other options (orthopedic surgery, estrogen use for contraception, and a family history of DVT) are all recognized conditions that increase the risk of developing venous thrombosis.