MDS PREP
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.
In Peutz-Jeghers syndrome, the oral lesions are
1. Ulcerations of oral mucosa
2. Sebaceous glands of oral mucosa
3. Silver pigmentation of oral mucosa
4. None of the above
Oral Pathology
Answer: 3
In Peutz-Jeghers syndrome, the oral lesions are characterized by silver pigmentation of the oral mucosa.
Necrotising ragged ulceration with no apparent inflammatory responses is indicative of
1. Leucocytosis
2. Polycythaemia vera
3. Sickle cell anaemia
4. Agranulocytosis
Oral Pathology
Answer: 4
Necrotizing ragged ulceration with no apparent inflammatory response is indicative of agranulocytosis.
Choose the false statement among the four
1. X-rays are ionizing rays
2. X-rays can be focused
3. X-rays cannot be seen or touched
4. X-rays can cause mutation
Oral Pathology
Answer: 2
X-rays can be focused is a false statement; they cannot be focused in the same way as light.
Radiation dose to patient can be reduced by all of the following except
1. Speed films
2. Filters
3. By increasing target-object distance
4. Decreasing kilovoltage potential
Radiation dose can be reduced by using speed films, filters, and increasing target-object distance.
An odontogenic neoplasm that may be mistaken for an ameloblastoma but is of mixed tissue origin and considerably less aggressive is
1) A cementoblastoma
2) An odontogenic fibroma
3) A cementifying fibroma
4) An ameloblastic fibroma
Oral Pathology
Answer: 4
An ameloblastic fibroma is a benign odontogenic tumor that contains both epithelial and mesenchymal components, making it a mixed tissue neoplasm. While it can resemble an ameloblastoma histologically, it is generally less aggressive and has a better prognosis. Ameloblastic fibromas are often found in younger patients and can be treated effectively with surgical excision.
Serum alkaline phosphatase levels are increased in
1. Osteoarthritis
2. Dentinogenesis imperfecta
3. Paget"s disease
4. Rheumatoid arthritis
Oral Pathology
Answer: 3
Serum alkaline phosphatase levels are increased in Paget's disease.
Facial paralysis resulting in drooping of a corner of the mouth and excess lacrimation is characteristic of which of the following conditions
1. Bell"s palsy
2. Tic douloureux
3. Meniere"s disease
4. Stevens-Johnson syndrome
Oral Pathology
Answer: 1
Facial paralysis with drooping of the mouth and excess lacrimation is characteristic of Bell's palsy.