MDS PREP
Thistle-tube appearance of pulp chamber is a feature of
1) Coronal dentin dysplasia
2) Regional odontodysplasia
3) Dentinogenesis imperfecta
4) Amelogenesis imperfecta
Oral Pathology
Answer: 1
Coronal dentin dysplasia is a genetic condition that affects the development of dentin, leading to abnormal pulp chamber morphology. The "thistle-tube" appearance refers to the shape of the pulp chamber, which resembles a thistle tube due to the constricted and elongated form of the pulp space. This condition is characterized by a normal crown appearance but with significant alterations in the pulp chamber and root canal system, making it distinct from other dental dysplasias.
Which of the following may be a feature of acromegaly?
1. Large tongue
2. Micrognathia
3. Hypoglycaemia
4. Crowded teeth
Oral Pathology
Answer: 1
A large tongue is a common feature of acromegaly.
Radiation injury to the haemopoietic system of the bone marrow occurs when the whole body exposure ranges between
1. 50-100 rads
2. 200-1000 rads
3. 1000-5000 rads
4. 10,000 rads to more
Radiation injury to the hematopoietic system occurs when whole body exposure ranges between 200-1000 rads.
Cafe-au-lait spots are seen in
1. Paget"s disease of bone
2. Cherubism
3. Von Recklinghausen disease
4. Von Willebrand disease
Oral Pathology
Answer: 3
Cafe-au-lait spots are seen in Von Recklinghausen disease.
Which of the following skin lesions are correctly matched with the
1. Erythema multiforme-Steven-Johnson syndrome
2. Recurrent apthous ulcer-Bechet"s syndrome
3. Lichen planus greenspan"s syndrome
4. All of the above
Oral Pathology
Answer: 4
Erythema multiforme - Steven-Johnson syndrome: Erythema
multiforme is a condition that can progress to Steven-Johnson syndrome
(SJS), which is a severe form of the disease characterized by extensive
mucosal involvement and skin detachment.
Recurrent aphthous ulcer - Behçet's syndrome: Behçet's
syndrome is an inflammatory condition that can present with recurrent oral
ulcers, including aphthous-like lesions, along with other systemic
manifestations.
Lichen planus - Grinspan's syndrome: Grinspan's
syndrome refers to a variant of lichen planus that is associated with
diabetes mellitus and can present with oral lesions.
Chemotherapy can be successful during treatment of
1. Ameloblastoma
2. Leukaemia
3. Fibrosarcoma
4. Basal cell carcinoma
Oral Pathology
Answer: 2
Chemotherapy can be successful in the treatment of leukemia.
All of the following statements about idiopathic thrombocytopenic purpura are true except
1. It is associated with platelet-specific autoantibodies
2. It causes a prolonged bleeding time
3. It is often controllable by immunosuppressive treatment
4. It causes more prolonged haemorrhage than haemophilia
Oral Pathology Answer: 4
It is associated with platelet-specific autoantibodies:
This statement is true. ITP is characterized by the
presence of autoantibodies that specifically target and destroy platelets,
leading to thrombocytopenia (low platelet count).
It causes a prolonged bleeding time: This statement is true.
In ITP, the low platelet count results in a prolonged bleeding time, as
there are fewer platelets available to form a clot.
It is often controllable by immunosuppressive treatment:
This statement is true. ITP can often be managed with
immunosuppressive therapies, such as corticosteroids, intravenous
immunoglobulin (IVIG), or other immunosuppressive agents, to help increase
platelet counts.
It causes more prolonged hemorrhage than hemophilia:
This statement is not true. While both ITP and hemophilia
can lead to bleeding, the mechanisms are different. Hemophilia is a clotting
factor deficiency, which can lead to more severe and prolonged bleeding
episodes, especially after trauma or surgery. In contrast, ITP primarily
affects the number of platelets rather than the clotting factors. Therefore,
the bleeding in hemophilia can be more severe and prolonged compared to that
in ITP.
Complication of irradiation of mouth may include all EXCEPT
1. Accelerated caries activity
2. Caries in unusual sites
3. Accelerated periodontal diseases
4. Xerostomia
Oral Pathology
Answer: 3
Accelerated periodontal diseases is not a complication of irradiation of the mouth.