Frontal sinus

FRONTAL SINUS

Q. 1

Frontal sinus drain into:

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Ethmoid recess

Q. 1

Frontal sinus drain into:

 A

Superior meatus

 B

Inferior meatus

 C

Middle meatus

 D

Ethmoid recess

Ans. C

Explanation:

Q. 2

Sinus not present at birth is:

 A

Ethmoid

 B

Maxillary

 C

Sphenoid

 D

Frontal

Q. 2

Sinus not present at birth is:

 A

Ethmoid

 B

Maxillary

 C

Sphenoid

 D

Frontal

Ans. D

Explanation:

Q. 3

Most superior sinus in the face is:

 A

Frontal sinus

 B

Ethmoid sinus

 C

Maxillary sinus

 D

Sphenoid sinus

Q. 3

Most superior sinus in the face is:

 A

Frontal sinus

 B

Ethmoid sinus

 C

Maxillary sinus

 D

Sphenoid sinus

Ans. A

Explanation:

Q. 4

Periodicity is a characteristic feature in which sinus infec­tion:

 A

Maxillary sinus infection 

 B

Frontal sinus infection

 C

Sphenoid sinus infection

 D

Ethmoid sinus infection

Q. 4

Periodicity is a characteristic feature in which sinus infec­tion:

 A

Maxillary sinus infection 

 B

Frontal sinus infection

 C

Sphenoid sinus infection

 D

Ethmoid sinus infection

Ans. B

Explanation:

 

Areas of High attenuation surrounded by a thin zone of low attenuation

CT scan reveals pansinusitis and polyposis

Pain of frontal sinusitis shows characteristic periodicity, i.e. comes upon waking, gradually increases and reaches its peak by mid­day and then starts subsiding. It is also called “office headache” as it is present only during office hours.



Q. 5

Best view for frontal sinus:

 A

Caldwell

 B

Towne

 C

Water’s

 D

Lateral view

Q. 5

Best view for frontal sinus:

 A

Caldwell

 B

Towne

 C

Water’s

 D

Lateral view

Ans. A

Explanation:

Q. 6

Mucocele is commonly seen in sinus:

 A

Frontal

 B

Maxillary

 C

Ethmoid

 D

Sphenoid

Q. 6

Mucocele is commonly seen in sinus:

 A

Frontal

 B

Maxillary

 C

Ethmoid

 D

Sphenoid

Ans. A

Explanation:

 

A mucocele is an epithelial lined, mucus containing sac completely filling the sinus and capable of expansion:

  • Mucocele are most commonly formed in Frontal sinus followed by ethmoid, sphenoid and maxillary sinuses.
  • Mucocele of frontal sinus presents as a swelling in the floor of frontal sinus above the inner (medial) canthus. It displaces the eyeball forward, downward and laterally.

IOC = CT scan

TOC Endoscopic sinus surgery


Q. 7

Most common site for osteoma is:

 A

Maxillary sinus

 B

Ethmoid sinus

 C

Frontal sinus

 D

Sphenoid sinus

Q. 7

Most common site for osteoma is:

 A

Maxillary sinus

 B

Ethmoid sinus

 C

Frontal sinus

 D

Sphenoid sinus

Ans. C

Explanation:

 

  • Craniofacial osteomas are benign tumors often originating in the paranasal sinuses
  • The frontal sinus is the most frequent location followed by the ethmoid, maxillary and sphenoid sinus, respectively
  • Age of presentation = second to fifth decade with a male-femate ratio – 3:1.
  • Presentation:

Generally they are an incidental finding on radiography

It may produce symptoms like ‑

Visual impairment

Intracranial neurological complications like meningitis or pneumocephalus with seizure.

Management

Removal by endoscopic sinus surgery.


Q. 8

Sinus not present at birth is/are:        

September 2010

 A

Maxillary

 B

Ethmoidal

 C

Frontal

 D

All of the above

Q. 8

Sinus not present at birth is/are:        

September 2010

 A

Maxillary

 B

Ethmoidal

 C

Frontal

 D

All of the above

Ans. C

Explanation:

Ans. C: Frontal

The paranasal sinuses are hollow, air-filled cavities that are lined by a mucous membrane. The ethmoid and maxillary sinuses are present at birth.

The frontal sinus develops about the second year of life and the sphenoid about the third year. Sometimes, the frontal sinuses do not develop.


Q. 9

Sinus opening in middle meatus is:     

September 2011

 A

Posterior ethmoid sinus

 B

Sphenoid sinus

 C

Frontal sinus

 D

Nasolacrimal duct

Q. 9

Sinus opening in middle meatus is:     

September 2011

 A

Posterior ethmoid sinus

 B

Sphenoid sinus

 C

Frontal sinus

 D

Nasolacrimal duct

Ans. C

Explanation:

Ans. C: Frontal Sinus

Frontal sinus opens into the middle meatus of the nose at the anterior end of hiatus semilunaris

Middle Meatus

  • It is a nasal opening or canal situated between the middle and inferior conchae, and extends from the anterior to the posterior end of the latter.
  • On it is a curved fissure, the hiatus semilunaris and limited below by the edge of the uncinate process of the ethmoid and above by an elevation named the bulla ethmoidalis; the middle ethmoidal cells are contained within this bulla and open on or near to it.
  • Through the hiatus semilunaris the meatus communicates with a curved passage termed the infundibulum, which communicates in front with the anterior ethmoidal cells and in rather more than fifty percent of skulls is continued upward as the frontonasal duct into the frontal air-sinus; when this continuity fails, the frontonasal duct opens directly into the anterior part of the meatus.
  • Below the bulla ethmoidalis and hidden by the uncinate process of the ethmoid is the opening of the maxillary sinus (ostium maxillare); an accessory opening is frequently present above the posterior part of the inferior nasal concha.



Q. 10

Which of the following is false regarding frontal sinusitis ‑

 A

Pain shows periodicity

 B

Most common sinus involved in infants and children

 C

Pain is referred to as office headache

 D

Tenderness is present just above the medial canthus of eye

Q. 10

Which of the following is false regarding frontal sinusitis ‑

 A

Pain shows periodicity

 B

Most common sinus involved in infants and children

 C

Pain is referred to as office headache

 D

Tenderness is present just above the medial canthus of eye

Ans. B

Explanation:

Ans. is ‘b’ i.e., Most common sinus involved in infants and children

Most common sinus involved in infant and children is Ethmoid sinus.

Clinical features of acute sinusitis

Most common presenting patient’s compliant is persistent nasal discharge which can be of any quality (thin, thick, clear, or purulent). Nasal discharge from a sinus infection can be blood – tinged from excessive nose blowing and irritation. The clinical symptoms of acute sinusitis have been classified into major and minor.


Q. 11

In this CT-scan condition (marked with arrow)is commonly seen in sinus??

 A

Frontal

 B

Maxillary

 C

Ethmoid

 D

Sphenoid

Q. 11

In this CT-scan condition (marked with arrow)is commonly seen in sinus??

 A

Frontal

 B

Maxillary

 C

Ethmoid

 D

Sphenoid

Ans. A

Explanation:

This condition is mucocele,commonly seen in frontal sinus

A mucocele is an epithelial lined, mucus containing sac completely filling the sinus and capable of expansion:

  • Mucocele are most commonly formed in Frontal sinus followed by ethmoid, sphenoid and maxillary sinuses.
  • Mucocele of frontal sinus presents as a swelling in the floor of frontal sinus above the inner (medial) canthus. It displaces the eyeball forward, downward and laterally.


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