MDS PREP
In radiobiology, the "latent period" represents the period of time between
1. Cell rest and cell mitosis
2. The first and last dose in radiation therapy
3. Film exposure and image development
4. Radiation exposure and its biological effects
In radiobiology, the "latent period" represents the time between radiation exposure and its biological effects.
Bell"s palsy is triggered by
1. Exposure to cold
2. Tooth extraction
3. Local and systemic infection
4. Any of the above
Oral Pathology
Answer: 4
Bell's palsy can be triggered by exposure to cold, tooth extraction, or 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.
A bacterial disease with oral manifestations is
1. Herpes Measles
2. Measles
3. Diphtheria
4. Leishmaniasis
Oral Pathology
Answer: 3
Diphtheria serious bacterial infection that usually affects the mucous
membranes of the nose and throat.
Diphtheria signs and symptoms usually begin 2 to 5 days after a person becomes
infected. Signs and symptoms may include:
A thick, gray membrane covering the throat and tonsils
A sore throat and hoarseness
Swollen glands (enlarged lymph nodes) in the neck
Difficulty breathing or rapid breathing
Nasal discharge
Fever and chills
Tiredness
Skin (cutaneous) diphtheria
A second type of diphtheria can affect the skin, causing pain, redness and
swelling similar to other bacterial skin infections. Ulcers covered by a gray
membrane also may be a sign of skin diphtheria.
A man of 50 years age reports with gradual loss of visual acuity and hearing power, most probably underlying cause could be
1. Fibrous dysplasia
2. Paget"s disease
3. Osteopetrosis
4. Cherubism
Oral Pathology
Answer: 2
Paget's disease is the most likely underlying cause for gradual loss of visual acuity and hearing power in a 50-year-old man.
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.
Clinical features of which of the following include conjunctivitis, urethritis mucocutaneous lesions and arthritis?
1. Behcet"s syndrome
2. Hodgkin"s disease
3. Grinspan syndrome
4. Ehlers-Danlos syndrome
Oral Pathology
Answer: 1
Behçet's syndrome is a systemic vasculitis characterized by recurrent oral and genital ulcers, uveitis (which can lead to conjunctivitis), skin lesions, and arthritis.
The maximum permissible dose of radiation to the operator of an X-ray machine is
1. 0.05 rem per year
2. 0.5 rem per year
3. 5.0 rem per year
4. 50 rem per year
Oral Pathology
Answer: 3
The maximum permissible dose of radiation to the operator of an X-ray machine is 5.0 rem per year.