MDS PREP
Pink"s disease is due to
1. Toxicity of silver
2. Toxicity of mercury
3. Toxicity of lead
4. Toxicity of tetracycline
Oral Pathology
Answer: 2
Pink's disease is due to the toxicity of mercury.
Which of the following is true regarding seminoma?
1) 40% cases occur in children <1 year of age
2) Alpha fetoprotein can be used as a marker
3) Dysgerminoma is its ovarian counterpart
4) All of the above statements are true
General Pathology Answer: 3Dysgerminoma is the ovarian counterpart of seminoma, which is a germ cell tumor found in the testes.
Pernicious anemia results due to :
1.vit B12 deficiency resulting from inadequate intrinsic factor
2.Folic acid deficiency resulting from inadequate intrinsic factor
3.Vit B12 deficiency resulting from inadequate extrinsic factor
4.Al of the above
Pathology Answer: 1
The correct answer for the MCQ is option 1: Pernicious anemia results from
vitamin B12 deficiency resulting from inadequate intrinsic factor. This is
because pernicious anemia is specifically caused by the body's inability to
absorb vitamin B12 due to a lack of intrinsic factor, which is required for the
absorption of vitamin B12 in the small intestine. Folic acid deficiency, while
it can also cause megaloblastic anemia, is not directly associated with
intrinsic factor and is a separate entity from pernicious anemia.
1. Vitamin B12 deficiency resulting from inadequate intrinsic factor:
Vitamin B12 is an essential nutrient that plays a critical role in the
production of healthy red blood cells. It is involved in the synthesis of DNA
and the metabolism of fatty acids and amino acids. Intrinsic factor is a protein
produced by the parietal cells of the stomach that binds to vitamin B12,
allowing it to be absorbed in the small intestine. When there is a deficiency of
intrinsic factor, vitamin B12 cannot be effectively absorbed from food, leading
to vitamin B12 deficiency anemia. This is the most common cause of pernicious
anemia.
Pernicious anemia is an autoimmune disorder where the body's immune system
mistakenly attacks the stomach cells that produce intrinsic factor. Without
sufficient intrinsic factor, vitamin B12 cannot be absorbed, resulting in a
decrease in the number of red blood cells produced. The red blood cells that are
formed are abnormally large and immature, known as megaloblasts. These cells are
not efficient at carrying oxygen and are destroyed more quickly than normal
cells, leading to the symptoms of anemia such as fatigue, weakness, and pallor.
The deficiency in vitamin B12 can also affect the nervous system, causing
neuropathy, cognitive impairment, and other neurological symptoms.
2. Folic acid deficiency resulting from inadequate intrinsic factor:
Folic acid is another B-vitamin essential for the production of red blood cells
and is involved in DNA synthesis. However, folic acid deficiency is not directly
caused by a lack of intrinsic factor. Folic acid is absorbed in the small
intestine through a different mechanism than vitamin B12. While folic acid
deficiency can also lead to megaloblastic anemia, it is not typically referred
to as pernicious anemia. Pernicious anemia is specifically associated with
vitamin B12 deficiency due to intrinsic factor deficiency or malabsorption.
3. Vitamin B12 deficiency resulting from inadequate extrinsic factor:
The term "extrinsic factor" is not commonly used in the context of vitamin B12
deficiency. Vitamin B12 is derived from dietary sources such as meat, fish, and
dairy products. In the context of pernicious anemia, the issue is with the
intrinsic factor, which is necessary for the absorption of vitamin B12.
Therefore, this option is not accurate for explaining the cause of pernicious
anemia.
A 50-year-old obese man complains of several recent abscesses in the gingival with loosening of teeth. He also suffers from itching of skin and polyuria. The most probable aetiology is
1. Scurvy
2. Myxoedema
3. Diabetes mellitus
4. Vitamin A deficiency
Oral Pathology
Answer: 3
The most probable etiology for the man’s symptoms is Diabetes mellitus, given the signs of abscesses and polyuria.
Patient giving history of thrombocytopenic purpura reports for extraction. What could be the most common postoperative complication?
1. Oedema
2. Haemorrhage
3. Infection spreading through tissue spaces
4. Dry socket
Oral Pathology
Answer: 2
The most common postoperative complication in thrombocytopenic purpura is hemorrhage.
Size of the bite wing film is
1. 32 * 41 mm
2. 22 * 35 mm
3. 57 * 76 mm
4. 75 * 90 mm
Oral Pathology
Answer: 1
The size of the bite wing film is 32 * 41 mm.
Quantity of the X-ray beam is governed by
1. kVp
2. mAs
3. Filament current
4. Length of the X-ray tube
Oral Pathology
Answer: 1
Quantity of the X-ray beam is governed by mAs (milliampere-seconds).
Tetracycline stains appear as
1. Yellow and brown stains in enamel and dentin
2. Yellow and brown stains only in enamel
3. Yellow and brown stains only in dentin
4. Only yellow stain in enamel
Oral Pathology
Answer: 1
Tetracycline stains appear as yellow and brown stains in both enamel and dentin.