One of the earlier signs of cavernous sinus thrombosis is due to deficit in the function of:

# One of the earlier signs of cavernous sinus thrombosis is due to deficit in the function of:

A. Trochlear nerve

B. Abducens nerve

C. Oculomotor nerve

D. Ophthalmic division of trigeminal nerve

The correct answer is B. Abducens nerve.

Because the abducens nerve (cranial nerve VI) is usually the first nerve to become involved due to its location in the lateral wall of the cavernous sinus, an early sign may be an internal strabismus.

Ref: ORAL AND MAXILLOFACIAL PATHOLOGY, A Rationale for Diagnosis and Treatment, Second Edition Page no 77

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Exfoliative cytology is mainly used in the definitive diagnosis of the:

 # Exfoliative cytology is mainly used in the definitive diagnosis of the:

A. Oral cancer

B. Fungal infection

C. Vesiculobullous diseases

D. Viral infection

The correct answer is C. Vesiculobullous diseases.

It has been recognized that the exfoliative oral cytologic smear is also of value in the diagnosis of diseases other than carcinoma, particularly diseases which are characterized by the presence of certain specific cells. Thus, cytologic smears have been useful in the diagnosis of lesions of herpes simplex infection, herpes zoster, pemphigus vulgaris, benign familial pemphigus, keratosis follicularis, hereditary benign intraepithelial dyskeratosis, white sponge nevus, and pernicious and sickle cell anemia.

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 597

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The prognosis of epidermoid carcinoma is least favorable

 # Of the following locations, the one in which the prognosis of epidermoid carcinoma is least favorable is:

A. Lower lip

B. Hard palate

C. Buccal mucosa

D. Posterior lateral border of tongue

The correct answer is D. Posterior lateral border of tongue.

The epidermoid carcinoma/ squamous cell carcinoma is the most common malignant neoplasm of the oral cavity. Although it may occur at any intraoral site, certain sites are more frequently involved than

others. Because of the differences in clinical appearance, the nature of the lesion and particularly the prognosis, it is well to describe the tumors individually, as they may arise in these various areas.

Of the areas of the oral cavity, the mortality rate is lowest for lip cancer (0.04 per 100,000) and highest for the tongue (0.7 per 100,000).

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 103

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The most common development disorder affecting the tongue is:

 # The most common development disorder affecting the tongue is:

A. Median rhomboid glossitis

B. Abnormally fissured tongue

C. White spongy nevus

D. Black hairy tongue

The correct answer is B. Abnormally fissured tongue.

Fissured tongue is a condition frequently seen in the general population and it is characterized by grooves that vary in depth and are noted along the dorsal and lateral aspects of the tongue. Although a definitive etiology is unknown, a polygenic mode of inheritance is suspected because the condition is seen clustering in families who are affected.

Patients are usually asymptomatic, and the condition is initially noted on routine intraoral examination as an incidental finding. 

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 29

 

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