MDS PREP
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 caries is caused by irradiation of
1. Salivary glands
2. Enamel
3. Enamel and dentin
4. Oral mucosa
Oral Pathology
Answer: 1
Radiation caries is caused by irradiation of salivary glands.
The treatment for a child with cherubism is
1. Surgical excision
2. Cosmetic surgery after puberty
3. Radiation
4. Enbloc dissection
Cosmetic surgery after puberty is the treatment for a child with cherubism.
Koebner"s phenomenon is seen with
1. Erythema multiforme
2. Pemphigoid
3. Psoriasis
4. Impetigo
Oral Pathology
Answer: 3
Koebner's phenomenon refers to the development of skin lesions at the site of trauma in individuals with certain skin conditions. It is most commonly associated with psoriasis, where new psoriatic plaques can form following skin injury or trauma.
Which of the following is a common complication of hyperparathyroidism?
1) Osteoporosis
2) Osteopetrosis
3) Renal stones
4) Hypoparathyroidism
A common complication of hyperparathyroidism is the formation of renal stones due to elevated calcium levels in the urine.
Which of the following is the MOST likely explanation for when two days after removal of a cancerous neck lesion, there is thigh and calf cramps, tingling around the lips, low serum calcium, and high serum phosphate?
1) Hyperparathyroidism
2) Primary hypoparathyroidism
3) Pseudohypoparathyroidism
4) Renal failure
The symptoms described are indicative of primary hypoparathyroidism, which can occur after surgical removal of the parathyroid glands.
Lession of facial nerve at level of stylomastoid foramen leads to
1. Loss of taste sensation from anterior 2/3 of tongue
2. Paralysis of orbicularis oculi muscle
3. Losss of innervation to stapedius
4. Loss of lacrimal secretion
Lesion of the facial nerve at the stylomastoid foramen leads to paralysis of the orbicularis oculi muscle.
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.