MDS PREP
The extracellular polysaccharide synthesized by cariogenic streptococci in the presence of excess sucros is best described as
1) Mucopolysaccharide
2) Dextran-like glucan
3) Glycogen-like glucan
4) Amylopectin
Oral Pathology
Answer: 2
Cariogenic streptococci, particularly Streptococcus mutans, synthesize extracellular polysaccharides when exposed to high levels of sucrose. These polysaccharides are primarily dextran-like glucans, which are formed from the polymerization of glucose units. Dextran contributes to the formation of dental plaque and biofilm, facilitating the adherence of bacteria to tooth surfaces and promoting caries development.
Dinesh, a 24-year-old male, complains of loose teeth in a single quadrant. His radiograph shows irregular bone loss and histopathology reveals eosinophils and histiocytes. The most probable diagnosis is
1. Hand-Schuller-Christian disease
2. Paget"s disease
3. Osteoclastoma
4. Albright"s syndrome
Oral Pathology
Answer: 1
The most probable diagnosis for irregular bone loss and eosinophils is Hand-Schuller-Christian disease.
What is the primary lesion associated with an increased risk of adenocarcinoma of the distal esophagus?
1) Generalized fatigue
2) Goodpasture's syndrome
3) Barrett's esophagus
4) Sarcoma
Barrett's esophagus is the primary lesion associated with an increased risk of adenocarcinoma of the distal esophagus.
Bite cells are seen in -
1) G6PD deficiency
2) SCA
3) Hereditary spherocytosis
4) Trauma
General Pathology
Answer: 1
Bite cells are characteristic of G6PD deficiency, resulting from oxidative damage to red blood cells.
Bismuth intoxication is manifested as
1. Pigmentation in areas of inflammation
2. Burtonian line
3. Gingiva
4. Blackish line in mucosa
Oral Pathology
Answer: 1
Bismuth intoxication is manifested as pigmentation in areas of inflammation.
What are common signs of Cushing's syndrome?
1) Hyperkalemia and extreme fatigue
2) Central obesity and a buffalo hump
3) Decreased blood glucose levels
4) Testicular atrophy
Common signs of Cushing's syndrome include central obesity and a buffalo hump, resulting from excess cortisol production.
Progenitor hematopoietic stem cells originate in -
1) Bone Marrow
2) Thymus
3) Lymph node
4) Spleen
General Pathology
Answer: 1
Progenitor hematopoietic stem cells originate in the bone marrow, where they differentiate into various blood cell lineages.
Port wine stains are seen in
1. Nevus
2. Haemangioma
3. Melanoma
4. All the above
Port wine stains are seen in hemangioma.