MDS PREP
An abnormal resorption pattern in primary teeth, delayed eruption of permanent teeth and a large tongue are the features of
1. Addison"s disease
2. Hypothyroidism
3. Hyperthyroidism
4. Von-Recklinghausen disease
Oral Pathology
Answer: 2
Hypothyroidism is characterized by abnormal resorption patterns in primary teeth and delayed eruption of permanent teeth.
Which of the following is not characteristic of congenital syphilis?
1. Ghon complex
2. Interstitial keratitis
3. Mulberry molars
4. Notched incisors
Oral Pathology
Answer: 1
Ghon complex is associated with primary tuberculosis, not congenital syphilis. The other options (interstitial keratitis, mulberry molars, and notched incisors) are indeed characteristics of congenital syphilis.
The primary defect which leads to sickle cell anemia is -
1) An abnormality in porphyrin part of hemoglobin
2) Replacement of glutamate by valine in ?-chain of HbA
3) A nonsense mutation in the ?-chain of HbA
4) Substitution of valine by glutamate in the ?-chain of HbA
General Pathology
Answer: 2
The primary defect in sickle cell anemia is the replacement of glutamic acid by valine in the ?-chain of hemoglobin, leading to the sickling of red blood cells.
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.
Mean exposure of radiation from pantamograph is
1. 90 mR
2. 120 mR
3. 250 mR
4. 300 mR
Oral Pathology
Answer: 3
Mean exposure of radiation from a pantomograph is approximately 250 mR.
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.
At what level in the skin do bullae MOST likely develop in a localized cutaneous infection around the mouth with phage group II Staphylococcus aureus?
1) Across the basal cells
2) Below the basement membrane
3) Between the basal cells and the basement membrane
4) High in the epidermis
General Pathology Answer: 4
Bullae in a localized cutaneous infection with Staphylococcus aureus typically develop high in the epidermis due to the infection.
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.