MDS PREP
Which of the following is least affected in vit C deficiency
1. Gingival fibres
2. Periodontal ligament
3. Blood vessels of the gingival
4. Epithelial lining of the mucosa
Oral Pathology
Answer: 4
The epithelial lining of the mucosa is least affected in Vitamin C deficiency.
Which of the following diseases are characterized by absence of lamina dura, hypocalcified dentine, elongated pulp horns, periapical infection with multiple periapical fistulas
1. Paget"s disease
2. Primary hyperthyroidism
3. Vit D resistant rickets
4. Hypophosphatasia
Oral Pathology
Answer: 3
Vitamin D resistant rickets is characterized by absence of lamina dura and hypocalcified dentine.
Palatal petechiae t are present in
1. hyperthyroidism
2. infectious mononucleosis
3. osteopetrosis
4. hypophosphatasia
Oral Pathology
Answer: 2
Palatal petechiae are often seen in infectious mononucleosis, which is caused by the Epstein-Barr virus.
A White blood cell count of more than 1,00,000 cells/cc of blood indicates
1. Leukopenia
2. Leukocytosis
3. Leukaemia
4. Polycythaemia
Oral Pathology
Answer: 3
A white blood cell count of more than 100,000 cells/cc indicates leukemia.
Diapedesis Connotes:
1. Pavementing of neutrophils
2. Migration of
neutrophils In tissues
3. Increased urine output
4. Exodus of neutrophils from
vascular compartment
Pathology Answer: 4
Diapedesis is a critical process in the body's immune response, particularly in the context of inflammation.
In the lipooxygenase pathway of the arachidonic acid metabolism, which of the following products helps to promote platelet aggregation and vasoconstriction?
1) C5a
2) Thromboxane A2
3) Leukotriene B4
4) C1 activators
General Pathology
Answer: 2
Thromboxane A2, produced in the lipooxygenase pathway, promotes platelet aggregation and vasoconstriction, playing a key role in hemostasis.
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.
Which of the following tumors is most aggressive
1) Myxoma
2) Cementoblastoma
3) Ameloblastic fibroma
4) Ameloblastic fibro-odontoma
Oral Pathology
Answer: 1
Myxoma is the most aggressive tumor among the options listed. It is a rare,
benign, but locally aggressive neoplasm that can occur in various anatomic
locations, particularly in the heart and skin. Myxomas are known for their
ability to invade surrounding tissue and cause significant damage to the organ
in which they are found.
Here is a brief description of each tumor type:
1) Myxoma: As mentioned earlier, these are rare but locally
aggressive tumors that can invade and destroy surrounding tissues. They are
typically soft and gelatinous in consistency. When myxomas occur in the heart,
they can obstruct blood flow and cause severe complications.
2) Cementoblastoma: This is a rare, benign tumor that arises
from the periodontal ligament cells that are responsible for producing cementum,
which is the bone-like tissue that anchors teeth in the jaw. Cementoblastomas
are generally slow-growing and less aggressive compared to myxomas.
3) Ameloblastic fibroma: This is a benign, non-invasive tumor
that occurs in the jaw, typically in younger patients. It is composed of both
odontogenic epithelial cells and mesenchymal cells, which are involved in tooth
development. These tumors can cause expansion of the bone but are not as
aggressive as myxomas.
4) Ameloblastic fibro-odontoma: This is a mixed odontogenic
tumor, which means it is composed of both dental epithelial and mesenchymal
cells. It is usually benign and presents as a slowly growing, painless swelling
in the jaw. While it can cause bone expansion, it is less aggressive and
typically does not invade surrounding tissues like a myxoma.