What type of tissue is the origin of a rhabdomyoma______________?
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Answer: C. Striated muscle
Explanation
A rhabdomyoma is a benign tumour of striated skeletal muscle, recognised under the microscope by large cells with abundant eosinophilic cytoplasm and visible cross-striations. The equivalent tumour of smooth muscle is a leiomyoma, nerve tissue gives rise to schwannomas and neurofibromas, and vascular endothelium gives haemangiomas. Its malignant counterpart is the rhabdomyosarcoma, which is why a biopsy matters.
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Answer: B. Dentinogenesis imperfecta
Dentinogenesis imperfecta is a hereditary developmental disorder affecting the organic matrix of dentin. Abnormal dentin production continues post-eruptively, causing complete obliteration of the pulp chambers and root c...
Q2. Infections caused by which of the following microorganisms are particularly noted for abscess formation:_____________?
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Answer: D. Staphylococci
Staphylococci produce potent extracellular toxins that recruit massive numbers of neutrophils rapidly. The intense localized inflammatory response results in thick purulent exudate formation. Tissue destruction by these...
Q3. In which condition is acute non-suppurative sialadenitis typically observed______________?
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Answer: B. Mumps
Mumps is a classic viral infection that typically presents as acute, non-suppurative inflammation of the parotid salivary glands. The parotitis caused by the mumps paramyxovirus does not produce purulent exudate from Ste...
Q4. Radiographic examination of the anterior mandibular region in a patient reveals radiolucencies positioned above the apices of the right central and lateral incisors. In the absence of restorations, cavities, pain, or swelling, with pulp vitality preserved, the diagnosis is_________________?
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Answer: B. Cementoblastoma
Cementoblastoma is a true benign neoplasm of cementoblasts forming a mineralized mass fused to tooth roots. Radiographic imaging typically reveals a well-defined radiopaque mass surrounded by a thin radiolucent rim. Alth...
Q5. What are the typical clinical features of Addison’s disease_____________?
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Answer: C. Is an autoimmune disease
Addison disease involves immune-mediated destruction of the adrenal cortex tissue. Circulating autoantibodies target steroid-producing cells leading to primary glandular insufficiency. Loss of adrenal tissue prevents ade...
Q6. By what alternative name is adenoid cystic carcinoma known_______________?
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Answer: A. Cylindroma
Adenoid cystic carcinoma is also known historically as a cylindroma due to its characteristic cribriform microscopic appearance. The term cylindroma reflects the cylindrical pseudolumina and basement membrane-like materi...