MDS PREP
Patient giving history of thrombocytopenic purpura reports for extraction. What could be the most common postoperative complication?
1. Oedema
2. Haemorrhage
3. Infection spreading through tissue spaces
4. Dry socket
Oral Pathology
Answer: 2
The most common postoperative complication in thrombocytopenic purpura is hemorrhage.
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.
False about cherubism
1. Unilocular lesion
2. Bilateral
3. Presence of giant cell
4. Delayed eruption of permanent teeth
Cherubism is not characterized by unilocular lesions; it is typically bilateral.
When taking radiographs for children, exposure should be reduced by what percentage of that of adults?
1. 25 %
2. 50 %
3. 75 %
4. Same exposure
Oral Pathology
Answer: 2
Exposure for children should be reduced by 50% compared to adults.
The burtonian line around the gingival is caused by the absorption of
1. Lead
2. Copper
3. Mercury
4. Bismuth
Oral Pathology
Answer: 1
The Burtonian line around the gingival is caused by the absorption of lead.
Most radioresistant cells are
1. Lymphocytes
2. Granulocytes
3. Muscle cells
4. Connective tissue cells
Oral Pathology
Answer: 3
Muscle cells are the most radioresistant cells.
Angular stomatitis
1. Can be a concomitant of any candidal infection
2. Is seen mainly in adults
3. May be associated with Streptococcus
4. May be a sign of anaemia
Angular stomatitis can be a sign of anemia and may be associated with candidal infections.
A case presenting with a gray coloured pseudomembrane whose removal is difficult and painful, can be
1) ANUG
2) Diphtheritic lesion
3) Secondary stage of syphilis
4) Desquamative gingivitis
Oral Pathology
Answer: 2
Diphtheritic lesions are caused by Corynebacterium diphtheriae. The hallmark of diphtheria is a tough gray pseudomembrane on mucosal surfaces like the pharynx or oral cavity. Attempting to remove it causes pain and bleeding. Other conditions like ANUG (acute necrotizing ulcerative gingivitis) produce pseudomembranes but are more localized and less gray.