Maxillary sinus

MAXILLARY SINUS

Q. 1

All open into hiatus semilunaris except

 A

Posterior ethmoid sinus

 B

Anterior ethmoid sinus

 C

Frontal sinus

 D

Maxillary sinus

Q. 1

All open into hiatus semilunaris except

 A

Posterior ethmoid sinus

 B

Anterior ethmoid sinus

 C

Frontal sinus

 D

Maxillary sinus

Ans. A

Explanation:

Q. 2

All drains into middle meatus, except:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Q. 2

All drains into middle meatus, except:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Ans. A

Explanation:

Q. 3

All drain into middle meatus, except:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Q. 3

All drain into middle meatus, except:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Ans. A

Explanation:

Q. 4

The Maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semulunaris

 B

Bulla ethmoides

 C

Infundibulum

 D

None of the above

Q. 4

The Maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semulunaris

 B

Bulla ethmoides

 C

Infundibulum

 D

None of the above

Ans. A

Explanation:

Q. 5

Ohngren’s line that divides maxillary sinus into superolateral and inferomedial zone is related to?

 A

Maxillary sinusitis

 B

Maxillary carcinoma

 C

Maxillary osteoma

 D

Infratemporal carcinoma

Q. 5

Ohngren’s line that divides maxillary sinus into superolateral and inferomedial zone is related to?

 A

Maxillary sinusitis

 B

Maxillary carcinoma

 C

Maxillary osteoma

 D

Infratemporal carcinoma

Ans. B

Explanation:

Ohngren’s line is a line joining the medial canthus of the eye with the angle of the mandible.

It divides the maxillary sinus into two components: suprastructure (superolateral) and infrastructure (inferomedial).

The location as well as extent of tumor (maxillary carcinoma) has prognostic significance.

Tumors involving the suprastructure of the maxillary antrum have a worse prognosis than those involving the infrastructure.


Q. 6

All of the following paranasal sinuses drain into middle meatus, EXCEPT:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Anterior group of ethmoidal sinus

Q. 6

All of the following paranasal sinuses drain into middle meatus, EXCEPT:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Anterior group of ethmoidal sinus

Ans. A

Explanation:

 
 

Q. 7

All of the following structures open into the middle meatus, EXCEPT:

 A

Ant. ethmoidal sinus

 B

Post. ethmoidal sinus

 C

Frontonasal duct

 D

Maxillary sinus

Q. 7

All of the following structures open into the middle meatus, EXCEPT:

 A

Ant. ethmoidal sinus

 B

Post. ethmoidal sinus

 C

Frontonasal duct

 D

Maxillary sinus

Ans. B

Explanation:

Posterior ethmoid sinus opens into superior meatus. 
  • Anterior ethmoid cells are divided into frontal recess cells, which open into the frontal recess of the middle meatus, infundibular cells which open into the ethmoid infundibulum and and bullae or middle ethmoid cells which open into the middle meatus.
  • Maxillary sinus drain into the middle meatus of nasal cavity.  The frontal sinus opens into the infundibulum of middle meatus through frontonasal duct.
  • Sphenoid sinus opens into the sphenoethmoidal recess above and behind the superior nasal concha. 

Q. 8

The maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semilunaris

 B

Bulla ethmoidalis

 C

Infundibulum

 D

None of the above

Q. 8

The maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semilunaris

 B

Bulla ethmoidalis

 C

Infundibulum

 D

None of the above

Ans. A

Explanation:

The maxillary sinus is the largest of the paranasal sinuses and is located in the maxilla, lateral to the nasal cavity and inferior to the orbit.

The maxillary sinus opens into the posterior aspect of the hiatus semilunaris in the middle meatus.

The infraorbital nerve (CN V-2) primarily innervates the maxillary sinus.

 

 


Q. 9

All of the following drain into middle meatus, EXCEPT:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Q. 9

All of the following drain into middle meatus, EXCEPT:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Ans. A

Explanation:

The lacrimal gland lies in the superolateral corner of the orbit.

Tears drain from the eyeball, via the nasolacrimal duct, into the inferior nasal meatus of the nasal cavity.

The lacrimal gland is innervated by visceral motor parasympathetic neurons from CN VII.


Q. 10

All of the following structures drains into middle meatus, EXCEPT:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Q. 10

All of the following structures drains into middle meatus, EXCEPT:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Ans. A

Explanation:

The nasolacrimal duct is the only structure that drains into the inferior meatus.

Its opening is in the anterosuperior aspect of the meatus and can be injured during maxillary sinus surgery.

 
Anterior ethmoid sinus is divided into frontal recess cells, infundibular cells and bullar or middle ethmoidal cells. Frontal recess opens into the frontal recess of the middle meatus, infundibular cells open into ethmoid infundibulum and middle ethmoid cells open directly into middle meatus.
 
Maxillary sinus drains into middle meatus of nasal cavity. The frontal sinus drain into anterior aspect of middle meatus.
 

Q. 11

The maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semulinaris

 B

Bulla ethmoidalis

 C

Infundibulum

 D

None of the above

Q. 11

The maxillary sinus opens into middle meatus at the level of:

 A

Hiatus semulinaris

 B

Bulla ethmoidalis

 C

Infundibulum

 D

None of the above

Ans. A

Explanation:

Q. 12

All drains into middle meatus except:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Q. 12

All drains into middle meatus except:

 A

Lacrimal duct

 B

Maxillary sinus

 C

Frontal sinus

 D

Ethmoidal sinus

Ans. A

Explanation:

Q. 13

Osteomeatal complex (OMC) connects:

 A

Nasal cavity with maxillary sinus

 B

Nasal cavity with sphenoid sinus

 C

The two nasal cavities

 D

Ethmoidal sinus with ethmoidal bulla

Q. 13

Osteomeatal complex (OMC) connects:

 A

Nasal cavity with maxillary sinus

 B

Nasal cavity with sphenoid sinus

 C

The two nasal cavities

 D

Ethmoidal sinus with ethmoidal bulla

Ans. A

Explanation:

 

Osteomeatal complex lies in the middle meatus.

It is the final common drainage pathway for the maxillary, frontal and anterior ethmoid sinuses into the nasal cavity.


Q. 14

Maxillary sinus achieves maximum size at:

 A

At birth

 B

At primary dentition

 C

At secondary dentition 

 D

At puberty

Q. 14

Maxillary sinus achieves maximum size at:

 A

At birth

 B

At primary dentition

 C

At secondary dentition 

 D

At puberty

Ans. C

Explanation:

 

  • Maxillary sinus is the first sinus to develop at birth.
  • It is completely developed by 9 years of age, i.e. approximately at the time of secondary dentition.



Q. 15

First paranasal sinus to develop at birth is:

 A

Maxillary

 B

Ethmoidal

 C

Frontal

 D

Sphenoidal

Q. 15

First paranasal sinus to develop at birth is:

 A

Maxillary

 B

Ethmoidal

 C

Frontal

 D

Sphenoidal

Ans. A

Explanation:

Q. 16

Antrum of Highmore is another name for:

 A

Maxillary

 B

Ethmoid

 C

Sphenoid

 D

Frontal

Q. 16

Antrum of Highmore is another name for:

 A

Maxillary

 B

Ethmoid

 C

Sphenoid

 D

Frontal

Ans. A

Explanation:

         

Maxillary sinus is also called as antrum of highmore and is the first to develop in human fetus.

It is the largest paranasal sinus (15 ml capacity in adults).


Q. 17

Ground glass appearance of maxillary sinus on CT scan is seen on:

 A

Maxillary sinusitis

 B

Maxillary carcinoma

 C

Maxillary polyp

 D

Maxillary fibrous dysplasia

Q. 17

Ground glass appearance of maxillary sinus on CT scan is seen on:

 A

Maxillary sinusitis

 B

Maxillary carcinoma

 C

Maxillary polyp

 D

Maxillary fibrous dysplasia

Ans. D

Explanation:

Q. 18

Ohngren’s line that divides maxillary sinus into supero­lateral and inferomedial zone is related to:

 A

Maxillary sinusitis

 B

Maxillary carcinoma

 C

Maxillary osteoma

 D

Infratemporal carcinoma

Q. 18

Ohngren’s line that divides maxillary sinus into supero­lateral and inferomedial zone is related to:

 A

Maxillary sinusitis

 B

Maxillary carcinoma

 C

Maxillary osteoma

 D

Infratemporal carcinoma

Ans. B

Explanation:

Q. 19

Ohngren’s classification of maxillary sinus carcinoma is based on:

 A

Imaginary plane between medical canthus of eye and angle of mandible

 B

Imaginary plane between lateral canthus of eye and angle of mandible

 C

Two horizontal lines, one passing through floor of orbit and other through floor of antrum

 D

None

Q. 19

Ohngren’s classification of maxillary sinus carcinoma is based on:

 A

Imaginary plane between medical canthus of eye and angle of mandible

 B

Imaginary plane between lateral canthus of eye and angle of mandible

 C

Two horizontal lines, one passing through floor of orbit and other through floor of antrum

 D

None

Ans. A

Explanation:

Q. 20

Sudden death occurring after maxillary sinus irrigation is due to:      

DNB 10

 A

Fat embolism

 B

Pulmonary embolism

 C

Air embolism

 D

Maxillary artery thrombosis

Q. 20

Sudden death occurring after maxillary sinus irrigation is due to:      

DNB 10

 A

Fat embolism

 B

Pulmonary embolism

 C

Air embolism

 D

Maxillary artery thrombosis

Ans. C

Explanation:

Ans. Air embolism


Q. 21

Maxillary sinus drains into ‑

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Sphenoethmoidal recess

Q. 21

Maxillary sinus drains into ‑

 A

Inferior meatus

 B

Middle meatus

 C

Superior meatus

 D

Sphenoethmoidal recess

Ans. B

Explanation:

 Middle meatus



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