Dumble-bell shaped swelling is characteristic of which type of odontogenic space infection:

# ‘Dumble-bell’ shaped swelling is characteristic of which type of odontogenic space infection?

A. Submandibular space infection

B. Buccal space infection

C. Submasseteric space infection

D. Temporal space infection

The correct answer is D.Temporal Space Infection.

"Dumb-bell" shaped swelling is seen in deep temporal space infection because of zygomatic arch, swelling is seen superior and inferior to zygomatic arch resulting in Dumb-bell shaped swelling.

Presence of portwine stains, gingival overgrowth and convulsive disorders

 # Which of the following is characterized by the presence of portwine stains, gingival overgrowth and convulsive disorders?

A. Sturge Weber syndrome

B. Witkop syndrome

C. Hunter syndrome

D. Fanconi syndrome

The correct answer is A. Sturge Weber Syndrome.

Encephalotrigeminal Hemangiomatosis

(Sturge-Weber syndrome)

The facial cutaneous capillary venous angiomas (or port-wine nevi) are usually the first component

of the syndrome to be observed, at birth, and are confined almost exclusively to the skin area supplied by the trigeminal nerve. Neurologic manifestations are among the most characteristic features of the disease and consist of convulsive disorders and spastic hemiplegia with or without mental retardation. Occasionally, angiomatous lesions also involve the gingiva and buccal mucosa.

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 149

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Undifferentiated mesenchymal cells around blood vessels are known as:

# Undifferentiated mesenchymal cells around blood vessels are known as:

A. Histiocytes

B. Pericytes

C. Fibroblast

D. Osteoblast

The correct answer is B. Pericytes.

Experimental studies have shown that a population of progenitor cells with the potential to differentiate into several distinct mesenchymal cell types can be isolated from the periodontal ligament. In cell culture, periodontal ligament stem cells can differentiate into cells that form bone, cementum, cartilage, fat, muscle, and neuron- and glial-like cells. Recent work indicates that perivascular cells (pericytes) associated with the microvasculature of alveolar bone and periodontal ligament of mice can differentiate into osteoblasts, cementoblasts, cementocytes, and periodontal ligament fibroblasts in

untreated animals, as well as after injury of the periodontium.

Reference: Fundamentals of Oral Histology and Physiology, Arthur R. Hand, 2014, Page no 128

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The protein content of a keratocyst is found to be:

# The protein content of a keratocyst is found to be:

A. less than 4 gm/dL

B. 6 mg/dL

C. Equal to serum protein

D. More than serum protein

The correct answer is A. less than 4 gm/dL.

Aspirational biopsy of odontogenic keratocysts contains a greasy fluid which is pale in colour and contains keratotic squames. Protein content of cyst fluid below 4g% is diagnostic of odontogenic keratocysts. Smaller and unilocular lesions resembling other types of cysts may require a biopsy to confirm the diagnosis. On a CT scan, the radiodensity of a keratocystic odontogenic tumour is about 30 Hounsfield units, which is about the same as ameloblastomas. However, ameloblastomas show more bone expansion and seldom show high density areas.

Reference: Wikipedia

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