MDS PREP
Using "B" film, exposure is 1 R. What is the exposure when "D" film is used
1. 1 R
2. 1/2 R
3. 1/4 R
4. 1/8 R
Oral Pathology
Answer: 3
Using "B" film, exposure of 1 R will be reduced to 1/4 R when "D" film is used.
Which of the following epithelial changes commonly signify precancerous condition
1. Dyskeratosis
2. Hyperkeratosis
3. Parakeratosis
4. Acanthosis
Oral Pathology
Answer: 1
Dyskeratosis refers to abnormal keratinization of epithelial cells and is often associated with precancerous lesions. It indicates a disruption in normal cell maturation and can be a sign of potential malignancy. The other options may also be associated with various conditions but are not specifically indicative of precancerous changes.
The mode of inheritance of multilocular cystic fibrous dysplasia of the jaws and face is
1. Dominant
2. Recessive
3. Sex-linked
4. Intermediate sex-linked
Oral Pathology
Answer: 1
The mode of inheritance of multilocular cystic fibrous dysplasia is dominant.
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 NOT a characteristic of MEN IIA?
1) Medullary thyroid carcinoma
2) Pheochromocytoma
3) Parathyroid adenomas
4) Mucosal neuromas
Mucosal neuromas are not a characteristic of MEN IIA; they are associated with MEN IIB.
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.
Commonest type of Basal cell carcinoma is -
1. Ulcerated
2. Cystic
3. Morphoeic
4. Pigmented
Pathology
Answer: 1
1. Noduloulcerative Basal Cell Carcinoma: This is the most common subtype of
BCC, making up about 60-70% of all cases. It typically appears as a slowly
growing, round to oval, pearly or translucent nodule with a central ulceration
that may bleed or ooze. The borders of the lesion are often not well-defined and
may have a rolled, pearly edge with telangiectasias (small, dilated blood
vessels).
2. Cystic Basal Cell Carcinoma: This subtype presents as a round, dome-shaped
lesion with a cystic or fluid-filled center. It is less common than the
noduloulcerative type, and it may be mistaken for a benign cyst or epidermoid
cyst.
3. Morphoeic Basal Cell Carcinoma: Also known as sclerosing or morpheaform BCC,
this type is characterized by a slowly growing, ill-defined, firm, plaque-like
lesion that can infiltrate deeply into the skin. It may have a whitish, waxy
appearance with a scar-like texture. Morphoeic BCC tends to be more aggressive
and can be challenging to diagnose due to its subtlety.
4. Pigmented Basal Cell Carcinoma: This is a less common variant of BCC,
accounting for approximately 6-15% of cases. It presents with pigmentation in
the lesion, which can be brown, blue, or black. The presence of pigment can make
it look similar to melanoma, another type of skin cancer, so a biopsy is often
necessary to confirm the diagnosis.
The prothrombin levels that is of concern to dentist extraction is
1. 20 % normal PT
2. 40 % normal PT
3. 50 % normal PT
4. 100 % normal PT
A prothrombin level of 20% normal PT is of concern for dental extractions.