MDS PREP
Cafe-au-lait spots are seen in
1. Paget"s disease of bone
2. Cherubism
3. Von Recklinghausen disease
4. Von Willebrand disease
Oral Pathology
Answer: 3
Cafe-au-lait spots are seen in Von Recklinghausen disease.
Which of the following is not a form of ionising radiation
1. Alpha-particles
2. Beta-particles
3. X-rays
4. Radiowaves
Oral Pathology
Answer: 4
Radiowaves are not a form of ionizing radiation.
A developmental abnormality characterized by the presence of fewer than the usual number of teeth is
1) Anodontia
2) Oligodontia
3) Microdontia
4) Dens in dente
Oral Pathology
Answer: 2
1. Anodontia: This is the complete absence of teeth. It is a rare condition
where an individual fails to develop any teeth.
2. Oligodontia: This term is used when an individual has fewer teeth than the
typical dental formula, which is six incisors, two canines, two premolars, and
six molars in the permanent dentition (excluding the third molars or wisdom
teeth). The term "hypodontia" is often used synonymously with oligodontia, but
hypodontia can also refer to a broader range of conditions characterized by the
congenital absence of one or more teeth, whereas oligodontia is more
specifically the absence of six or more teeth.
3. Microdontia: This condition involves teeth that are smaller than normal. It
can affect either the primary or permanent dentition and may involve one tooth
or multiple teeth.
4. Dens in dente: This is a rare developmental anomaly where a tooth forms
within the dental crown of another tooth, typically in the form of a small
tooth-like structure. It is not a condition of tooth number but rather an
abnormality of tooth structure.
All of the following statements about thrush are true EXCEPT
1. It is caused by a gram-negative fungus
2. It is characterized by a plaque of proliferating epithelial and other cells
3. It is a complication of immunosuppression or systemic disease
4. It can affect neonates in an epidemic fashion
Oral Pathology
Answer: 1
Explanation:
It is caused by a gram-negative fungus: This statement
is not true. Thrush is caused by Candida albicans,
which is a yeast (fungus) but not a gram-negative organism. In fact, fungi
are not classified as gram-positive or gram-negative in the same way that
bacteria are. Candida is a eukaryotic organism and does not fit
into the gram classification system.
It is characterized by a plaque of proliferating epithelial and
other cells: This statement is true. Thrush
presents as white patches or plaques in the oral cavity, which consist of
fungal elements, dead epithelial cells, and inflammatory cells.
It is a complication of immunosuppression or systemic disease:
This statement is true. Thrush is commonly seen in
individuals who are immunocompromised, such as those with HIV/AIDS, cancer
patients undergoing chemotherapy, or individuals on long-term corticosteroid
therapy.
It can affect neonates in an epidemic fashion: This
statement is true. Thrush can indeed affect neonates,
particularly those born to mothers with vaginal candidiasis, and outbreaks
can occur in neonatal intensive care units.
Radiodensity can be increased by
1. Decreasing mA
2. Decreasing kVp
3. Decreasing target-film distance
4. Increasing target-film distance
Oral Pathology
Answer: 3
Radiodensity can be increased by increasing target-film distance.
Recurrent ulcers occuring on gingival and palate are most probably
1) Aphthous ulcers
2) Herpes simplex
3) Koplick spots
4) Lesions of Behcet"s syndrome
Oral Pathology
Answer: 2
Recurrent ulcers on the gingiva and palate are most commonly associated with herpes simplex virus (HSV) infections. Herpes simplex can cause painful vesicular lesions that eventually ulcerate, leading to recurrent oral ulcers, particularly in the mucosal areas such as the gingiva and palate.
Aphthous ulcers (option 1) typically occur on non-keratinized mucosa and are not usually found on the gingiva. Koplick spots (option 3) are associated with measles and are not ulcers but rather small, bluish-white spots on the buccal mucosa. Behcet's syndrome (option 4) can cause oral ulcers, but they are often more widespread and associated with systemic symptoms. Therefore, the most probable cause of recurrent ulcers specifically on the gingiva and palate is herpes simplex.
Which of the following is associated with a low concentration of ionized calcium in the serum?
1. Hypothyroidism
2. Osteogenesis imperfecta
3. Paget"s disease of the bone
4. Tetany
Oral Pathology
Answer: 4
Tetany is associated with a low concentration of ionized calcium in the serum.
Hypopigmentation, gray streaks of hair, degranulation defect of neutrophils and neuropathy are seen in
1. Aleukaemic leukaemia
2. Chronic granulocytic leukaemia
3. Lazy leukocyte syndrome
4. Chediak-Higashi syndrome
Oral Pathology
Answer: 4
Hypopigmentation, gray streaks of hair, degranulation defect of neutrophils, and neuropathy are seen in Chediak-Higashi syndrome.