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					Model MCQs - 3rd Year Students                                     ‫كلية طب النسنان‬
Academic Year: 2010-2011                                          ‫قسم باثولوجيا الفم‬




(I) Choose one correct answer:
  1. Regarding fusion, one of the following statements is correct :
     a) It represents partial division of a single tooth germ
     b) Two neighboring teeth unite in cementum
     c) Two neighboring teeth germs unite at least in dentine
     d) In complete fusion, the number of teeth is not affected

  2. Which of the following conditions is an ectopic condition:
     a) White spongy nevus
     b) Latent bone cyst
     c) Fordyce's granules
     d) Both b and c

  3. All the following conditions are hyperplastic except:
     a)   Verruca vulgaris
     b)   Fibro-epithelial polyp
     c)   Pyogenic granuloma
     d)   Peripheral fibroma

  4. Daughter cysts are common histological finding of:
     a) Lateral developmental cyst
     b) Dentigerous cyst
     c) Odontogenic keratocyst
     d) Radicular cyst

  5. Persistent sharp pain on thermal changes is characteristic feature of:
     a) Acute pulpitis
     b) Acute periapical abscess
     c) Chronic pulpitis
     d) Periapical granuloma




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6. One of the following conditions is characterized by
   pseudoepitheliomatous hyperplasia:
   a) Verruca vulgaris
   b) Granular cell myoblastoma
   c) Pyogenic granuloma
   d) Chondroma
7. One of the following conditions is an example of chromosomal
   abnormality:
   a) Mongolism
   b) Crouzon syndrome
   c) Ectodermal dysplasia
   d) Pierre Robin syndrome
8. Langhan giant cells is a common histological feature of:
   a) White spongy nevus
   b) Chelitis granulomatosa
   c) Fordyce granules
   d) Chelitis glandularis

9. About lateral developmental cyst, one statement of the following is
   INCORRECT:
   a) It is odontogenic cyst
   b) Might originate from remnants of dental lamina
   c) Associated tooth is vital
   d) It is negative in X-ray

10.About acquired enamel pellicle, one statement is CORRECT :
   a) It is of bacterial origin
   b) It is consisted mainly of acidic glycoprotein
   c) Lactobacilli can digest the pellicle
   d) None of the above




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11.Which of the following conditions is associated with elevated serum
   alkaline phosphatase enzyme?
   a) Facial fibrous dysplasia
   b) Hyperparathyroidism
   c) Familial fibrous dysplasia
   d) Osteomyelitis
12.One of the following lesions is related to high consumption of spicy
   food:
   a) Frictional keratosis
   b) Lichen planus
   c) Oral submucous fibrosis
   d) Kerato-acanthoma
13.Oral hairy leukoplakia is caused by:
   a) Cytomegalovirus
   b) Varicella –Zoster virus
   c) Paramyxovirus
   d) Epstein-Barr virus
14.One of the following conditions is considered as a well-differentiated
   variant of squamous cell carcinoma:
   a) Spindle cell carcinoma
   b) Verrucous carcinoma
   c) Krompecker’s carcinoma
   d) None of the above
15.Cotton wool appearance is a characteristic radiographic feature of:
   a) Sclerosing osteomyelitis
   b) Pyogenic osteomyelitis
   c) Dry socket
   d) None of the above
16.Benign cementoblastoma is characterized radiographically by:
   a) Well defined radiopaque area with radiolucent rim surrounding it
   b) Well defined radiolucent area with radiopaque margin
   c) Multilocular well defined radiolucent area
   d) None of the above
17.One of the following bone tumors is associated with elevated ESR:
   a) Osteoma
   b) Osteoid osteoma
   c) Ewing’s sarcoma
   d) Osteogenic sarcoma




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18.Epi-myoepithelial islands are common histological feature of:
   a) Sjogren’s syndrome
   b) Uveoparotitis
   c) Auriculotemporal syndrome
   d) Epidemic parotitis
19.One of the following conditions occurs almost exclusively in the parotid
   gland:
   a) Sialolithiasis
   b) Warthin’s tumor
   c) Pleomorphic adenoma
   d) Adenocystic carcinoma
20.One of the following odontogenic tumors is NOT locally invasive:
   a) Polycystic ameloblastoma
   b) Adenomatoid odontogenic tumor
   c) Pindborg tumor
   d) Odontogenic myxoma

21.All the following conditions are hereditary EXCEPT:
   a) Leukoedema
   b) White spongy nevus
   c) Witkop’s disease
   d) Darier’s disease
22.A 3-year old boy shows only bilateral symmetric enlargement of the
   posterior mandibular areas. The most probable diagnosis is:
   a) Osteitis deformans
   b) Albright syndrome
   c) Cherubism
   d) Facial fibrous dysplasia
23.Moth-eaten appearance is a characteristic radiographic feature of:
   a) Sclerosing osteomyelitis
   b) Dry socket
   c) Pyogenic osteomyelitis
   d) Paget’s disease of bone
24.Congenital epulis of new born shows presence of tumor cells with
   granular cytoplasm, it also shows pseudo-epithelimatous hyperplasia:
   a) The two statements are correct
   b) The two statements are incorrect
   c) Only the first statement is correct
   d) Only the second statement is correct




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25.All of the following are true neoplasms of the palate except:
    a) Pleomorphic adenoma.
    b) Fibro-epithelial polyp
    c) Compact osteoma
    d) Squamous cell carcinoma.
26.Common wart is caused by:
    a) Paramyxo virus
    b) Human papilloma virus
    c) Pox virus
    d) Herpes simplex virus
27.Recurrence after surgical removal is a common complication of:
    a) Warthin’s tumor
    b) Oncocytoma
    c) Pleomorphic adenoma
    d) Squamous cell papilloma
28.The histopathological features of acute pulpitis include:
    a) Infiltration by polymorph nuclear leucocytes and dilated blood vessels
    b) Replacement of pulp tissue by granulation tissue
    c) Proliferation of blood vessels and presence of multinucleated giant cells
    d) All of the above
29. One of the following lesions is usually associated with atrophy of
    surface epithelium:
    a) Nodular leukoplakia
    b) Candidal leukoplakia
    c) Oral submucous fibrosis
    d) Carcinoma in situ
30.One of the following conditions usually cause bilateral parotid swelling:
    a) Sialoleithiasis
    b) Acute suppurative sialadenitis
    c) Chronic sialadenitis
    d) Viral mumps
31.Concrescence is a condition characterized by:
    a) Fusion of two teeth by cementum
    b) Fusion of teeth after completion of root formation
    c) Frequent incidence in maxillary molars
    d) All of the above




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32. About epithelial dysplasia one of the following statements is NOT true:
    a) In mild dysplasia, dysplastic cells are present in lower third of epithelium.
    b) Poikilokaryonosis is the presence of abnormal mitosis in superficial layers
        of epithelium.
    c) Loss of polarity of basal cells leads to formation of cell nest.
    d) Excess DNA quantity leads to hyperchromatism of nuclei.
33.Ill-fitted denture is considered as one of the related etiologic factors of:
    a) Pregnancy tumor.
    b) Fibro-epithelial polyp
    c) Pyogenic granuloma
    d) Peripheral giant cell granuloma
34.Rodent ulcer occurs commonly in sun-exposed areas of the skin. This
    ulcer shows irregular margins and everted edges:
    a) The two statements are incorrect
    b) The two statements are correct
    c) The first statement is correct while the second statement is incorrect
    d) The first statement is incorrect while the second statement is correct
35.Which of the following cysts is usually associated with pain or
    tenderness:
    a) Odontogenic keratocyst
    b) Dentigerous cyst
    c) Aneurysmal bone cyst
    d) Simple bone cyst
36.Mongolian spots is a variant of:
    a) Junctional nevus
    b) Blue nevus
    c) Vascular nevus
    d) Intradermal nevus
37.One of the following conditions is hereditary:
    a) Fusion
    b) Dentinogenesis imperfecta
    c) Dilaceration
    d) Concresence
38.Bull-like teeth are those teeth showing:
    a) Dens invaginatus
    b) Gemination
    c) Taurodontism
    d) Fusion




                                       6
39.The common histopathological feature of odontogenic keratocyst is:
    a) Infolded parakeratinized squamous epithelial lining
    b) Connective tissue capsule free of inflammatory cells
    c) Epithelial budding and daughter cysts in the fibrous capsule
    d) All of the above
40. Histopathological criteria of periapical granuloma do NOT include:
    a) Trabeculae of woven bone
    b) Strands of epithelial cells
    c) Chronic inflammatory cells
    d) Large number of foam cells
41.Which of the following benign tumors has a multiple hereditary form?:
    a) Neurolemmoma
    b) Granular cell myoblastoma
    c) Neurofibroma
    d) Rhabdomyoma
42.Microbial infection is considered as the etiologic factor of:
    a) Verruca vulgaris
    b) Heck's disease
    c) Pyogenic granuloma
    d) All of the above
43.One of the following features is related to stage III of TNM system:
    a) Palpable but not fixed bilateral lymph nodes
    b) Palpable but not fixed epsilateral lymph nodes
    c) Non palpable lymph nodes
    d) Evidence of distant metastasis
44. One of the following conditions occurs multiple:
    a) Fibrosarcoma
    b) Kaposi's sarcoma
    c) Squamous cell carcinoma
    d) Nasopharyngeal carcinoma
45. Sun ray appearance is a radiographic feature of:
    a) Fibrosarcoma
    b) Ewing's sarcoma
    c) Osteosarcoma
    d) Kaposi's sarcoma




                                  7
46. About Albright's syndrome, ALL the following are correct EXCEPT:
    a) Characterized by polyostotic fibrous dysplasia
    b) Melanin pigmentation is a constant feature
    c) Sexual precosity is a common hormonal disturbance
    d) Bones show a high tendency for malignant transformation
47.Which of the following cysts might occur multiple ?
    a) Gingival cyst of adult
    b) Nasopalatine duct cyst
    c) Gorlin’s cyst
    d) Odontogenic keratocyst
48.One of the following lesions is characterized radiologically by
    radiolucent area with scattered radiopacities:
    a) Polycystic ameloblastoma
    b) Calcifying epithelial odontogenic tumor
    c) Ameloblastic fibroma
    d) Unicystic ameloblastoma
49. The following are reactions of dentine against caries EXCEPT:
    a) Dentinal sclerosis
    b) Dead tracts
    c) Translucent zone with micropores
    d) Reparative dentine
50.Regarding alveolar clefts, one of the following statements is CORRECT:
    a) It is always associated with cleft palate
    b) It is always associated with cleft upper lip
    c) It is always associated with cleft lower lip
    d) None of the above




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                           Model Answer

              Question Choice Question      Choice
              Number a b c d Number        a b c d
                 1              26
                 2              27
                 3              28
                 4              29
                 5              30
                 6              31
                 7              32
                 8              33
                 9              34
                10              35
                11              36
                12              37
                13              38
                14              39
                15              40
                16              41
                17              42
                18              43
                19              44
                20              45
                21              46
                22              47
                23              48
                24              49
                25              50




                                                        GOOD LUCK
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Description: some questions for my students