MDS PREP
All of the following are chromosomal breakage syndromes except:
1) Fanconi’s anemia
2) Ehler-Danlos syndrome
3) Bloom’s syndrome
4) Ataxia telangiectasia
General Pathology
Answer: 2
Ehler-Danlos syndrome is not a chromosomal breakage syndrome; it is a connective tissue disorder caused by defects in collagen synthesis.
Dentinogenesis imperfecta is always associated with osteogenesis imperfecta in
1. Type I
2. Type II
3. Type III
4. All of the above
Oral Pathology
Answer: 1
Dentinogenesis imperfecta is always associated with osteogenesis imperfecta in Type I.
Radiation produced form tube other than focal spot is called
1. Stray radiation
2. Scattered radiation
3. Characteristic radiation
4. Primary radiation
Oral Pathology
Answer: 1
Radiation produced from the tube other than the focal spot is called stray radiation.
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.
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.
Which of the following genetic conditions is MOST likely to be the cause of a child born with a small head, small eyes, six fingers on each hand, and congenital heart defects?
1) Trisomy 13
2) Trisomy 18
3) Trisomy 21
4) XXY
Trisomy 13 is associated with congenital anomalies such as a small head, small eyes, and congenital heart defects.
Which of the following is NOT a feature of pseudohypoparathyroidism?
1) Mental retardation
2) Short stature
3) Elevated serum calcium
4) Missing metatarsal or metacarpal bones
Pseudohypoparathyroidism is characterized by resistance to parathyroid hormone, leading to low serum calcium levels, not elevated serum calcium.
Reduced salivary flow following irradiation is dose dependent. At what dose does the flow reach essentially zero?
1. 4000 rads
2. 5000 rads
3. 6000 rads
4. 7000 rads
Oral Pathology
Answer: 3
Reduced salivary flow reaches essentially zero at a dose of 6000 rads.