MDS PREP
All of the following statements about the typical feature of a periapical
granuloma are true EXCEPT
1) It consists of proliferating granulation tissue
2) It can form only if the periapical bone is resorbed
3) It shows evidence of local antibody production
4) It results from immunologically mediated tissue damage
Oral Pathology Answer: 2
Periapical granulomas were diagnosed as well-circumscribed periapical
radiolucency measuring less than 1.5 cm in diameter, periapical cysts were
characterized by well-defined periapical radiolucency with sclerotic borders
measuring greater than 1.5 cm, and periapical abscesses were characterized by
ill-defined periapical radiolucency with diffuse margins.
While bone resorption can occur in the presence of a periapical granuloma, it
is not a prerequisite for its formation. A periapical granuloma can develop in
response to pulp necrosis or infection without necessarily requiring bone
resorption to occur first. The granuloma can form as a reaction to the
inflammatory process, regardless of the state of the surrounding bone.
Bleeding time is prolonged in
1. Haemophilia
2. Von Willebrand"s disease
3. Henoch-Schonlein purpura
4. Telangiectasia
Oral Pathology
Answer: 2
Bleeding time is prolonged in von Willebrand's disease.
Paroxymal noctural hemoglobinuria is due to -
1) Acquired red cell defect
2) Congential red cell defect
3) Auto immune defect
4) Lead poisoning
General Pathology
Answer: 1
Paroxysmal nocturnal hemoglobinuria is due to an acquired red cell defect, specifically a defect in the cell membrane that makes red blood cells susceptible to lysis.
Grid is used
1. To remove secondary radiation
2. Filter the radiation
3. Removes scattered radiation
4. None of the above
Oral Pathology
Answer: 3
Grids are used to remove scattered radiation from the X-ray beam.
Which of the following conditions can lead to bone demineralization?
1) Osteopetrosis
2) Hyperparathyroidism
3) Pseudohypoparathyroidism
4) All of the above
Hyperparathyroidism and pseudohypoparathyroidism can lead to bone demineralization, while osteopetrosis is characterized by increased bone density.
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.
Zenkers degeneration is?
1) Coagulative necrosis
2) Liquefactive necrosis
3) Fibroid necrosis
4) Caseous necrosis
General Pathology Answer: 1Zenkers degeneration is characterized by coagulative necrosis, typically seen in cases of ischemia or infarction.
Diabetes insipidus, exophthalmous and radiolucent bone defects within the skull are most suggestive of which of the following conditions
1. Sickle cell anaemia
2. Niemann-pick disease
3. Letterer-Siwe disease
4. Hand-Schuller-Christian disease
Oral Pathology
Answer: 4
Diabetes insipidus, exophthalmos, and radiolucent bone defects suggest Hand-Schuller-Christian disease.