Home/Quiz/Board Exam MCQs on Skin and Vesiculobullous Diseases Board Exam MCQs on Skin and Vesiculobullous Diseases Welcome to your Board Exam MCQs on Skin and Vesiculobullous Diseases 1. A patient presents with a well-defined area of altered pigmentation on the oral mucosa. The lesion is flat and produces no elevation or depression of the surrounding tissue. Which dermatological term best describes this lesion? Papule Nodule Macule Plaque Vesicle None Hint 2. A 21-year-old woman reports severe gingival discomfort during gentle toothbrushing, accompanied by bleeding. Examination reveals widespread epithelial desquamation involving the attached gingiva. Which autoimmune mucocutaneous disorder should be included in the differential diagnosis? Mucous membrane pemphigoid Chronic discoid lupus erythematosus Pemphigus vulgaris Psoriasis Epidermolysis bullosa None Hint 3. A patient presents with bilateral, asymptomatic white lesions on the buccal mucosa showing a characteristic lace-like pattern of fine white lines. Which finding is most consistent with oral lichen planus? Dentinogenesis imperfecta Fordyce spots White, chalky enamel surface White radiating lines on the buccal mucosa Vesicles containing clear fluid None Hint 4. Antinuclear antibodies may be detected in several connective tissue disorders. Which of the following conditions can be associated with positive ANA testing? Systemic lupus erythematosus Systemic sclerosis Morphea All of the above None of the above None Hint 5. A child presents with sparse hair, reduced sweating, characteristic facial features, and congenitally missing teeth. Which condition is most likely associated with this presentation? Erythema multiforme Hereditary ectodermal dysplasia Keratosis follicularis Lichen planus Pemphigus vulgaris None Hint 6. A patient is diagnosed with limited cutaneous systemic sclerosis. The acronym CREST describes its characteristic clinical features. Which of the following is NOT included in CREST syndrome? Calcinosis Raynaud phenomenon Esophageal dysmotility Endocrine disorders Telangiectasia None Hint 7. A patient with an autoimmune blistering disorder develops fragile bullae and painful oral erosions. Gentle lateral pressure causes epithelial separation. Which condition is classically associated with this finding? Pemphigus vulgaris Epidermolysis bullosa simplex Herpes simplex infection Erythema multiforme Fibroma None Hint 8. A patient presents with well-demarcated erythematous plaques covered by silvery scales. Histopathological examination reveals collections of neutrophils within the parakeratotic stratum corneum. These collections are called: Tzanck cells Civatte bodies Donovan bodies Munro microabscesses Rushton bodies None Hint 9. A biopsy from a patient with oral lichen planus demonstrates shrunken, eosinophilic apoptotic keratinocytes with pyknotic or fragmented nuclei near the epithelial–connective tissue interface. What are these structures called? Tzanck cells Civatte bodies Donovan bodies Russell bodies Rushton bodies None Hint 10. A patient with oral lichen planus also has diabetes mellitus and hypertension. This historically described clinical association is known as: Grinspan syndrome Behçet syndrome CREST syndrome Stevens–Johnson syndrome Peutz–Jeghers syndrome None Hint 11. A dental student is reviewing the inheritance patterns of ectodermal dysplasia. Which statement most accurately describes the genetic inheritance of this group of disorders? All forms are autosomal recessive All forms are autosomal dominant All forms are X-linked dominant All forms are X-linked recessive Inheritance varies depending on the specific subtype None Hint 12. A patient presents with widespread mucosal erosions, fever, and epidermal detachment consistent with Stevens–Johnson syndrome. Which combination of sites is classically involved? Conjunctiva, genital mucosa, and oral mucosa Scalp, external ear, and hard palate only Nail beds, scalp, and vermilion border only Parotid glands, tongue muscles, and gingival sulcus Buccal mucosa, salivary glands, and alveolar bone only None Hint 13. Which of the following conditions is NOT classified as a lichenoid reaction or lichenoid interface disorder? Graft-versus-host disease Fixed drug eruption Secondary syphilis Pemphigus vulgaris Drug-induced lichenoid reaction None Hint 14. A patient with systemic sclerosis presents with restricted mouth opening and tight perioral skin. Which finding would be EXCEPTED rather than expected? Microstomia Widening of the oral aperture Perioral tightening Restricted tongue movement Difficulty with swallowing None Hint 15. Which of the following diseases is classically categorized as a collagen vascular disease? Pemphigus vulgaris Lichen planus Lupus erythematosus Recurrent aphthous stomatitis Herpes simplex infection None Hint 16. Which cytologic investigation may rapidly demonstrate acantholytic cells in a patient suspected of having pemphigus vulgaris? Fine-needle aspiration biopsy Tzanck smear Papanicolaou smear of cervical cells Bone marrow aspiration Salivary gland scintigraphy None Hint 17. All of the following conditions typically produce a subepithelial or subepidermal blister except: Bullous pemphigoid Pemphigus vulgaris Mucous membrane pemphigoid Epidermolysis bullosa acquisita Cicatricial pemphigoid None Hint 18. A patient develops slowly progressive unilateral atrophy of the skin and soft tissues of one side of the face. Which diagnosis is most likely? Systemic sclerosis Hemifacial hypertrophy Parry–Romberg syndrome Melkersson–Rosenthal syndrome Neurofibromatosis type 1 None Hint 19. Which autoantigen is recognized as a major target in many cases of mucous membrane pemphigoid (cicatricial pemphigoid)? Type I collagen only Type XVII collagen (BP180) Desmoglein 1 only Keratin 14 Filaggrin None Hint 20. The historical LE-cell phenomenon is most closely associated with which disease? Systemic lupus erythematosus Pemphigus vulgaris Bullous pemphigoid Systemic sclerosis Lichen planus None Hint 21. Erosive oral lichen planus may clinically resemble which condition that presents with erythematous, fragile, and peeling gingiva? Angular cheilitis Geographic tongue Desquamative gingivitis Leukoedema Fordyce granules None Hint 22. Grinspan syndrome is classically associated with which combination of conditions? Lichen planus, diabetes mellitus, and hypertension Aphthous ulcers, anemia, and hypothyroidism Leukoplakia, tuberculosis, and diabetes mellitus Oral submucous fibrosis, diabetes mellitus, and hypertension Pemphigus, hypertension, and anemia None Hint 23. Desmoplakin is an important target antigen in which disorder? Pemphigus foliaceus Pemphigus vulgaris Drug-induced pemphigus Paraneoplastic pemphigus Bullous pemphigoid None Hint 24. Unusual hyperextensibility of the tongue is most characteristic of which condition? Secondary syphilis Darier disease Ehlers–Danlos syndrome Epidermolysis bullosa acquisita Systemic sclerosis None Hint 25. A 60-year-old woman with diabetes mellitus reports burning when eating spicy foods. Oral examination reveals a lace-like keratotic pattern with occasional erosive areas. Which syndrome is classically associated with this oral condition? Peutz–Jeghers syndrome Sjögren syndrome Down syndrome Grinspan syndrome Gardner syndrome None Hint 26. En coup de sabre is most strongly associated with which subtype of scleroderma? Linear scleroderma Radicular scleroderma Vertical scleroderma Ovoid scleroderma Systemic sclerosis limited to the hands None Hint 27. Which histopathologic feature is most characteristic of lichen planus? Antiepithelial antibodies on routine histology A scattered inflammatory infiltrate with an ill-defined lower border A predominantly mixed inflammatory infiltrate A predominantly T-lymphocytic, band-like subepithelial infiltrate A suprabasal cleft with acantholytic cells None Hint 28. Café-au-lait macules may be observed in which of the following conditions? McCune–Albright syndrome Bloom syndrome Neurofibromatosis type 1 All of the above Only neurofibromatosis type 1 and McCune–Albright syndrome None Hint 29. Which oral finding has a recognized association with psoriasis? Lupus erythematosus Lupus vulgaris Benign migratory glossitis only in the absence of skin disease Geographic tongue Oral hairy leukoplakia None Hint 30. White radiating lines, known as Wickham striae, are characteristic of lesions of which disease? Erythema multiforme Lichen planus Pemphigus vulgaris Leukoplakia Mucous membrane pemphigoid None Hint 31. Which microscopic feature is most characteristic of pemphigus? Hyperparakeratosis Hyperorthokeratosis Acantholysis Acanthosis Subepithelial fibrosis without epithelial separation None Hint 32. A patient with lichen planus, diabetes mellitus, and hypertension is described as having which historically recognized association? Grinspan syndrome Peutz–Jeghers syndrome Gardner syndrome Sjögren syndrome Cowden syndrome None Hint 33. A 60-year-old woman reports burning when eating spicy foods. Examination shows lace-like white striae with erosive areas. Which histopathologic finding is most consistent with the suspected diagnosis? Saw-toothed rete ridges Bulbous rete ridges Broad, elongated rete ridges without basal degeneration Completely flattened rete ridges with no inflammatory infiltrate Suprabasal cleft formation with acantholysis None Hint 34. Which mucocutaneous disorder is characteristically associated with an underlying neoplasm? Pemphigus vulgaris Parapemphigus Pemphigus vegetans Paraneoplastic pemphigus Familial benign chronic pemphigus None Hint 35. All of the following are inherited connective tissue disorders except: Marfan syndrome McArdle disease Ehlers–Danlos syndrome Alport syndrome Osteogenesis imperfecta None Hint 36. Cicatricial pemphigoid is a traditional synonym for which condition? Pemphigus vulgaris Mucous membrane pemphigoid Paraneoplastic pemphigus Hailey–Hailey disease Pemphigus foliaceus None Hint 37. Which condition is classically associated with dystrophic or pathologic calcification in the skin and soft tissues? Scleroderma Lupus erythematosus Dystrophic epidermolysis bullosa only Lichen planus Recurrent aphthous stomatitis None Hint 38. A 3-year-old child develops extensive vesicles involving the lips, tongue, and oral mucosa. The vesicles rupture within several days, leaving erosions covered by pseudomembranes, and skin lesions are also present. Which diagnosis is most likely? Stevens–Johnson syndrome Primary herpetic gingivostomatitis Acute necrotizing ulcerative gingivitis Erythema multiforme Mucous membrane pemphigoid None Hint 39. Involvement of the oral, ocular, and genital mucosae is classically associated with which condition? Erythema multiforme only Systemic lupus erythematosus Stevens–Johnson syndrome Lichen planus Pemphigus foliaceus None Hint 40. A Tzanck smear may be used as a rapid supportive diagnostic test for which disorder? Pemphigus Acute necrotizing ulcerative gingivitis Lichen planus Recurrent aphthous stomatitis Leukoplakia None Hint 41. Multiple pulp stones have been reported as an oral or dental finding associated with which inherited connective tissue disorder? Down syndrome Ehlers–Danlos syndrome Apert syndrome Marfan syndrome Cleidocranial dysplasia None Hint 42. Which description best defines erythema multiforme? A chronic bacterial infection of the oral mucosa An acute, usually self-limiting immune-mediated disorder involving the skin and/or mucous membranes A painless vesicular disease limited to the oral cavity A disease caused exclusively by a viral infection A chronic autoimmune blistering disease that invariably produces scarring None Hint 43. A 22-year-old patient presents with rapidly developing symmetric erythematous plaques on the hands and forearms. Each lesion has three concentric zones, producing a classic target appearance. The patient also reports mild oral soreness. Which diagnosis is most likely? Erythema multiforme Psoriasis Lichen planus Pemphigus vulgaris Mucous membrane pemphigoid None Hint 44. A 35-year-old woman presents with recurrent oral ulcers, photosensitive facial erythema, arthralgia, and fatigue. Laboratory evaluation demonstrates antinuclear antibodies. Which underlying disease mechanism best explains this presentation? Autoimmune disease Malignant transformation Primary tissue degeneration Localized reactive proliferation Bacterial invasion of the connective tissue None Hint 45. A dentist is reviewing disorders that may produce oral mucosal lesions. A patient with painful gingival erosions is diagnosed with an autoimmune subepithelial blistering disease, while another patient has oral plaques caused by a fungal infection. Which condition is least consistently associated with characteristic oral lesions? Psoriasis Mucous membrane pemphigoid Oral candidiasis Stevens–Johnson syndrome Pemphigus vulgaris None Hint 46. A 68-year-old woman develops chronic oral erosions and conjunctival irritation. Biopsy reveals a subepithelial split, and direct immunofluorescence demonstrates linear immunoreactant deposition along the basement membrane zone. Which statement about mucous membrane pemphigoid is incorrect? It may show a female predominance Its target antigens are consistently restricted to the lamina densa The oral mucosa is commonly involved Autoantibodies may target basement membrane zone proteins It is an autoimmune subepithelial blistering disorder None Hint 47. A patient with suspected pemphigus vulgaris undergoes a Tzanck smear from the base of a freshly ruptured bulla. The smear demonstrates large rounded epithelial cells that have lost their intercellular attachments. What are these cells called? Tzanck cells Prickle cells Anitschkow cells Ghost cells Civatte bodies None Hint 48. A 30-year-old patient presents with intensely pruritic, violaceous, polygonal papules on the flexor surfaces of the wrists. Oral examination reveals fine white lines forming a lace-like pattern on the buccal mucosa. What is the primary morphologic skin lesion in this disease? Bulla Vesicle Papule Macule Pustule None Hint 49. A patient with chronic plaque psoriasis reports that new plaques repeatedly develop along areas where the skin has been scratched or traumatized. Which phenomenon explains this finding? Koebner phenomenon Nikolsky sign Auspitz sign Raynaud phenomenon Pathergy phenomenon None Hint 50. A 9-year-old child presents with diffuse, soft, thickened white plaques on both buccal mucosae. The lesions are asymptomatic, do not wipe off, and the child's mother reports similar findings in several relatives. Which inheritance pattern is most typical of the suspected condition? Autosomal recessive Autosomal dominant X-linked recessive Mitochondrial inheritance Multifactorial inheritance only None Hint 51. A 27-year-old patient has bilateral, asymptomatic, lacy white lines on the buccal mucosa. The lesions become more prominent when the mucosa is stretched. Which diagnosis is most likely? Leukoedema Erythema multiforme Lichen planus Leukoplakia Pemphigus vulgaris None Hint 52. A 5-year-old child presents with sparse hair, dystrophic nails, dry skin, and multiple missing or conical teeth. The clinician suspects hypohidrotic ectodermal dysplasia. Which structure is not classically included among the principal ectodermal derivatives affected in this disorder? Teeth Salivary glands Nails Hair Sweat glands None Hint 53. A 22-year-old patient presents with marked joint hypermobility, stretchy fragile skin, and easy bruising. Genetic counseling is arranged because the suspected Ehlers–Danlos syndrome is most commonly discussed in dental examinations as having which inheritance pattern? X-linked recessive X-linked dominant Autosomal recessive Autosomal dominant Mitochondrial inheritance None Hint 54. A 29-year-old woman reports photosensitivity, fatigue, and intermittent arthralgia. Examination reveals an erythematous, butterfly-shaped rash across the cheeks and nasal bridge that spares the nasolabial folds. Which diagnosis best explains this finding? Systemic lupus erythematosus Herpes simplex infection Systemic sclerosis Pemphigus vulgaris Psoriasis None Hint 55. A 48-year-old patient has chronic inflammatory polyarthritis with joint pain and swelling. The differential diagnosis includes rheumatoid arthritis, psoriatic arthritis, multicentric reticulohistiocytosis, and systemic lupus erythematosus. Which condition is classically least associated with erosive joint disease? Rheumatoid arthritis Multicentric reticulohistiocytosis Systemic lupus erythematosus Psoriatic arthritis Gouty arthritis None Hint 56. A 10-year-old child develops severe photosensitivity, freckle-like pigmentation, and multiple suspicious skin lesions after minimal sunlight exposure. The underlying disorder is associated with defective nucleotide excision repair. Which statement is most accurate? It is usually autosomal dominant There is impaired repair of ultraviolet-induced DNA damage It is characterized primarily by elongated rete ridges It results only from irregular melanin accumulation in the basal layer It is caused by an acquired bacterial infection None Hint 57. During an oral medicine review, a student confuses several similarly named disorders. Which of the following is not primarily classified as a cutaneous disease or a characteristic skin disorder? Keratosis follicularis Erythema multiforme Psoriasiform lesion Erythema migrans Darier disease None Hint 58. A patient presents with fragile oral bullae that rupture easily, leaving painful erosions. Histopathology demonstrates intraepithelial clefting above the basal cell layer due to loss of keratinocyte adhesion. Which condition is most likely? Pemphigus Lichen planus Bullous pemphigoid Candidiasis Erythema multiforme None Hint 59. A 35-year-old patient has greasy crusted papules in seborrheic areas and multiple keratotic lesions. Oral examination reveals small whitish papules or plaques. The suspected diagnosis is Darier disease. Which association is classically described in the supplied examination source? Vitamin A deficiency with involvement of skin and oral epithelium Predominantly diffuse tender palatal ulceration Pernicious anemia Rickets involving teeth and bones Isolated salivary gland obstruction None Hint 60. A child with epidermolysis bullosa has recurrent oral blistering, difficulty maintaining oral hygiene, and multiple carious teeth. Which diagnosis among the following is associated with increased susceptibility to dental caries in the supplied question? Down syndrome Pierre Robin sequence Epidermolysis bullosa Hereditary fructose intolerance Treacher Collins syndrome None Hint 61. A patient with oral lichen planus has a reticular white pattern on the buccal mucosa, while another patient has thickened plaques on the skin. During classification, which term is identified in the supplied examination item as not being a standard type of lichen planus? Hypertrophic Atrophic Verrucous Erosive Reticular None Hint 62. A 42-year-old woman has dry eyes, dry mouth, and recurrent oral discomfort. Serologic testing is requested for anti-Ro/SSA and anti-La/SSB antibodies. Which condition in the supplied question is listed as having these antibodies completely absent? Sjögren syndrome Diffuse systemic sclerosis Rheumatoid arthritis Systemic lupus erythematosus Mixed connective tissue disease None Hint 63. A patient with suspected autoimmune blistering disease undergoes direct immunofluorescence testing. The report describes immunoreactant deposition along the basement membrane zone in a discontinuous or patchy pattern. Which disease group best fits the source question? Lichen planus Pemphigus Pemphigoid Lupus erythematosus Recurrent aphthous stomatitis None Hint 64. A patient with oral lichen planus undergoes biopsy because of bilateral reticular white lesions and erosive areas. Histology shows separation at the epithelial–connective tissue interface, producing small clefts beneath the basal cell layer. What are these clefts called? Auspitz signs Civatte bodies Wickham striae Max-Joseph spaces Munro microabscesses None Hint 65. A 46-year-old woman presents with persistent sore, peeling gingiva that bleeds during toothbrushing. A biopsy and direct immunofluorescence study are arranged for suspected mucous membrane pemphigoid. Which is the most common oral presentation in the supplied examination source? Esophageal ulceration Soft-palate ulceration Symblepharon Desquamative gingivitis Isolated tongue vesicles None Hint 66. A child has sparse hair, abnormal or missing teeth, reduced sweating, heat intolerance, and prominent frontal bossing with protuberant lips. Which diagnosis best accounts for this combination of findings? Defective or absent sweat glands only Hyperpyrexia only Protuberant lips and frontal bossing only Ectodermal dysplasia with multiple associated findings Hereditary angioedema None Hint 67. A patient presents with fragile oral blisters that rupture to form painful erosions. Serologic testing identifies autoantibodies directed against components of the intercellular cementing substance of stratified squamous epithelium. Which diagnosis is most likely? Pemphigus vulgaris Bullous pemphigoid Verruca vulgaris Lichen planus Mucous membrane pemphigoid None Hint 68. A patient with suspected pemphigus vulgaris undergoes direct immunofluorescence testing on perilesional mucosa. The report describes intercellular IgG deposition in a net-like or fish-net pattern. Which test produced this characteristic finding? Tzanck smear Routine histopathology Direct immunofluorescence Fine-needle aspiration cytology Gram staining None Hint 69. A patient with an autoimmune blistering disorder has fragile bullae that rupture easily, leaving erosions. Histology demonstrates a split within the epithelium rather than beneath it. Which disorder is most consistent with this finding? Pemphigoid Pemphigus Bullous pemphigoid Bullous lichen planus Epidermolysis bullosa acquisita None Hint 70. A 60-year-old patient develops widespread painful bullae, erythematous targetoid lesions, and genital mucosal involvement after a recent medication exposure. Which diagnosis is most consistent with this acute mucocutaneous syndrome? Herpes zoster Stevens–Johnson syndrome Herpes simplex infection Herpangina Pemphigus vulgaris None Hint 71. During examination of a patient with a fragile blistering disorder, gentle lateral pressure applied to apparently intact perilesional mucosa causes the epithelium to shear and form a new blister. What is this clinical sign called? Chvostek sign Tinel sign Babinski sign Nikolsky sign Koebner phenomenon None Hint 72. A patient with chronic reticular oral lesions undergoes biopsy. Microscopy reveals degeneration and liquefaction of basal keratinocytes, with an interface inflammatory infiltrate. Which diagnosis is most likely? Leukoplakia Lichen planus Pemphigus Secondary syphilis Candidiasis None Hint 73. A patient develops extensive mucosal erosions and epidermal detachment after exposure to a medication. The original examination item asks about the hypersensitivity classification of Stevens–Johnson syndrome. Which option corresponds to the supplied answer? Type I hypersensitivity reaction Type IV hypersensitivity reaction Type II hypersensitivity reaction Type III hypersensitivity reaction Type I and Type II combined reaction None Hint 74. A 55-year-old patient has longstanding erosive oral lichen planus. Which statement is most appropriate? It must always be surgically excised It can be treated only with systemic medication It can undergo malignant transformation It is exclusively an idiosyncratic reaction It never requires follow-up None Hint 75. A patient with ulcerative colitis develops yellow-white pustules in a characteristic snail-track pattern on erythematous oral mucosa. What is the diagnosis? Pyostomatitis vegetans Sarcoidosis Lichen planus Dermatitis herpetiformis Mucous membrane pemphigoid None Hint 76. A biopsy from a patient with suspected lupus demonstrates immunoreactant deposition along the dermoepidermal junction, producing a lupus band. This finding is classically associated with: Psoriasis Lupus erythematosus Systemic sclerosis Myxedema Pemphigus vulgaris None Hint 77. A patient with well-demarcated erythematous plaques and silvery scales develops multiple pinpoint bleeding spots after scale removal. Which sign is present? Nikolsky sign Lupus band sign Auspitz sign Tzanck sign Koebner phenomenon None Hint 78. A patient develops a lichenoid oral eruption several weeks after starting a new medication. The eruption improves after withdrawal of the drug. What is the likely cause? Alcohol intake Cigarette smoking Betel nut chewing Certain medications Acute bacterial infection None Hint 1 out of 39 Time's up
