GENERAL FEATURES OF SKIN DISEASES

Asked Point :-

• Intrinsic causes of skin disease - Atopic dermatitis, Pityriasia alba, Seborrhoeic dermatitis.
• Chemical agents causing dermatitis by local irritation- Rubber, X rays, lime
• Dermatitis may be clinical manifestation of deficiency of - Biotin, niacin, pyridoxine
• MC occupational disease - Dermatosis
• Spongiosis seen in - Acute eczema
• Characteristic Finding of Eczema - Lichenification
• Dermatosis Papulosis Nigra - Seborrheic keratosis
• Cayenne pepper spots - Dermatosis
• Fordycee’s spots in oral cavity arise from- Sebaceous gland
• Fordycee spot - Ectopic sebaceous gland found in healthy people
• Fordycee spot mainly involve - Lip > buccal mucosa
• Exposure to sunlight can precipitate - Discoid lupus erythematosus
• Chloroquine is indicated in treatment of - DLE
• Severe in rainy season and improved completely in winter - Insect bite allergy
• Morbilliform eruption is seen in - Rubella, measles
• Hives and wheels caused by - Cold, hepatitis C, serum sickness
• Pruritis is NOT seen in - Pemphigus
• A young boy with rashes on web spaces and penis - Lichen nitidus
• Calcifying epithelioma - Dermatofibroma
• Recurrent oral ulcers with pain and erythematous halo around them - Aphthous ulcer
• Cayenne pepper strippling due to hemosiderin is found in - Plasma cell balanitis of zoon
• Keratoderma seen in - Pityriasis rubra pilaris, Reiter syndrome
• Veldt sore is common in - Deserts
• Change seen in Poikiloderma - Atrophy, Telangiectasia, Pigmentary changes
• MC site of felon - Thumb
• Boil can NOT occur at - Palm
• Treatment of erythematous skin rash with multiple pus lakes in a pregnant woman - Corticosteroids
• Itchy exudative lesions on face, palms and soles, siblings also have similar complaints. treatment of choice in such patient - Systemic ampicillin
• Drug of choice of Chronic folliculitis - Cloxacillin
• NOT a keratolytic agent - Zinc oxide
• PUVA therapy is indicated in - Psoriasis, Vitiligo, Atopic dermatitis
• Dermabrasion is contraindicated on - Eyelids, Pyoderma skin infection, Skin with severe radiation dermatitis, Basal cell carcinoma

Harrison Points :-

• Greasy yellowish scale is associated with - Seborrhoeic dermatitis
• Primary skin lesion - Plaque - > 1 cm flat topped seen in psoriasis and exfoliative dermatitis, tumor - > 5 cm solid
• Secondary skin lesion - Scale – excessive accumulation of stratum corneum
• Annular means - ring
• Herpetiform means - Grouped
• Milia - Small, firm papules with keratin
• Nummular - Coin
• Spongiosis means - Intercellular edema of epidermis
• Winter itch is also known as - Asteatotic eczema, Xerotic eczema
• Sign of Leser Trelat - Seborrhoeic keratosis
• Pentasomida - Tongue worm
• Discoid lupus erythematosus - Also known as chronic cutaneous lupus erythematosus, hyperkeratosis, follicular plugging, atrophy
• Erythematous papule with central punctum - Insect bite
• Firm red to brown nodule that shows dimpling of overlying skin with lateral compression - Dermatofibroma
• Diascopy - Skin blanch with pressure or not

Additional Points :-

• Dermatitis that occur due to plant derived phytophotoxic substance - Phytophotodermatitis
• Red dermatographism is seen in - Seborrheic dermatitis
• MC form of seborrheic dermatitis affecting trunk - Petaloid
• Cradle cap - Infantile seborrhoeic dermatitis
• Cyanne pepper appearance on diascopy - Discoid lupus erythematous
• Predominant acral eruptions are seen in - RMSF, secondary syphilis, erythema multiforme
• Lichen sclerosis - Atrophy of epidermis with dermal fibrosis
• Diascopy is useful in - Lupus vulgaris, cutaneous vasculitis, nevus anemicus
• Crystal used in microdermal abrasion - Aluminium oxide
• Commonly used depilating agent- Thioglycolate