MDS PREP
Which of the following is NOT a typical feature of Paget disease of bone?
1) Mosaic pattern of newly formed woven bone
2) Increased hat size
3) Hypertension
4) Osteosclerotic bones in late stages
Hypertension is not a typical feature of Paget disease of bone; it is characterized by a mosaic pattern of newly formed woven bone.
Oral lesions on the tongue and other mucosal surfaces of the oral cavity is commonly caused by the deficiency of
1. Vit B
2. Niacin
3. Vit C
4. Vit K
Oral Pathology
Answer: 2
Oral lesions on the tongue are commonly caused by a deficiency of Niacin (Vitamin B3).
Which of the following sexually transimitted is not of diseases either bacterial or chlamydial origin
1. Gonnorhoea
2. Syphilis
3. Molluscum contagiosum
4. Lymphogranuloma venereum
Oral Pathology
Answer: 3
Molluscum contagiosum is a viral infection caused by a poxvirus, not a bacterial or chlamydial infection. The other options (gonorrhea, syphilis, and lymphogranuloma venereum) are all caused by bacteria.
Immune surveillance is an effective host defence against tumours because:
1. Tumour cells are of different shapes and sizes
2. Tumour cells have lost growth control
3. Tumour cells have genetic alterations which result in expression of nonself proteins
4. Immune surveillance is a hypothetical concept
Pathology
Answer: 3
Tumour cells have genetic alterations which result in expression of nonself proteins: This is the most accurate statement regarding immune surveillance. Tumor cells often undergo genetic mutations that lead to the expression of abnormal proteins (neoantigens) that are not present in normal cells. These nonself proteins can be recognized by the immune system as foreign, triggering an immune response. This recognition is a key aspect of how immune surveillance functions effectively against tumors.
Metastatic disease to the oral region is most likely to occur in which of the following locations?
1) Tongue
2) Posterior maxilla
3) Posterior mandible
4) Floor of the mouth
Oral Pathology
Answer: 3
Metastatic disease in the oral cavity typically occurs in the posterior mandible. This is because the bone in this area is relatively porous and has a rich blood supply, making it more susceptible to the spread of cancer cells from distant sites in the body.
Which of the following blood components can be expected to increase with disseminated intravascular coagulation?
1) Factor V
2) Fibrin degradation products
3) Fibrinogen
4) Plasminogen
Fibrin degradation products increase in disseminated intravascular coagulation (DIC) due to the breakdown of fibrin clots.
When kVp is changed from 70 to 80 kVp the energy of photons produced
1. Decreased by 10 times
2. Increased two times
3. Increased by 10 percent
4. Remains constant
Oral Pathology
Answer: 2
Changing kVp from 70 to 80 increases the energy of photons produced significantly.
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.