Skin mci screening test and indian medical pg examz high yield important topics study tips
By Live Dr - Wed Feb 11, 3:17 am
|Layers of epidermis|
|Eccrine sweat glands||Crystalline miliaria|
|Apocrine sweat glands||Hydradenitis suppurativa
|Sebaceous glands||Fordyce disease|
Wood’s lamp examination
|T. vesicolor||Golden yellow|
|P. aeruginosa||Aqua green|
|Porphyria cutanea tarda||Pink-orange|
|Erythrasma||Coral red, pink|
|T. schonlenii||Pale green|
|Tuberous sclerosis||Blue white|
|Pseudomonas infection||Greenish white or pale blue|
|Porphyria cutanea tarda||Pinkish red -urine|
|Pityriasis versicolor||Golden yellow fluorescence|
|Tinea capitis||Green fluorescence|
Special types of tinea
|Tinea cruris||Affects groin|
|Tinea corporis||affects trunk|
|Tinea mannum.||Affects only the palms with scaling|
Problems cannot be solved by the same level of thinking that created them.- Albert Einstein
ELEVENTH HOUR SKIN 160
|Trichophytic granuloma / Majocchi’s granuloma||Perifollicular granuloma which is annular, raised and crusty, seen on wrists, and shin, caused by tinea rubrum and T. mentagrophytes.|
|Tinea umbricata / Jock itch/ Crotch itch / Dhobi’s itch||Concentric rings, of scales forming extensive patches with polycyclic borders.
Caused by tinea concentricum.
|Tinea pedis / athlete’s foot||T. mentagrophytes causes vesicular or bullous lesions in web spaces|
|Tinea falcei||Affects face unilaterally.|
|Tinea nigra||Black non scaly macules on palms and soles
Caused by T. hortae T. werneckii.
*T. capitis is not caused by Epidermophyton flocculosum, trichophyton concentricum, T. rubrum.
Special types of Acne
|Acne conglobata||Severe cystic acne with comedones, abscesses, sinuses and nodules.|
|Acne fulminans||Inflammatory nodules, cysts plaques, fever, constitutional symptoms, treated with steroids.|
|Acne venerata||Caused by contact with comedogenic chemicals|
|Acne cosmetica||Caused by contact with comedogenic cosmetics|
|Tropical acne||Acne on back, buttocks, thigh because of high humidity of tropical climate.|
|Acne excoriae Picker’s acne||Seen in females caused by compulsive picking of the lesions|
Dissecting cellulites of scalp
TYPES OF ALOPECIA
|Alopecia areata||Patches of smooth area with loss of hair.
At the periphery of patches are exclamation hair ( attenuated bulb with splayed pigmented distal end)
|Alopecia totalis||Total loss of scalp hair|
|Alopecia universalis||When hair has been lost over the entire body|
That dust on rugs and your furniture is not only dirt. It’s mostly made of dead skin cells. Everybody loses millions of skin cells every day which fall on the floor and get kicked up to land on all the surfaces in a room. You could say, “That’s me all over.”
ELEVENTH HOUR SKIN 161
|Gray patch||Characterized by scaly gray patches with stubs of broken hair and easy pluckability of hair.
Caused by ectothrix fungi.
Shows greenish yellow fluorescence under woods lamp.
|Black dot||Areas of alopecia studded with black dots representing hair broken off at surface of the scalp, caused by endothrix fungi.|
|Kerion celsii||Is a boggy indurated area exuding pus.
May be followed by scarring and permanent alopecia
|Favus/ Witkop||Affects scalp, glabrous skin, nails.
Concave Sulphur yellow crusts / scutulae form around loose wiry hair, atrophy leads to smooth glossy thin paper/ scars.
Phases of growth of hair
*Atopic dermatitis, infantile eczema/ neurodermatitis
Also called Besnier’s prurigo
|Signs of atopy|
|Dennie Morgan folds
(Extra fold beneath the eyelid is called the Denny Morgan fold)
Extra crease line just below the lower eyelid, exceeding midline(pupil)
Follicular papules on the extremities
Thinning of lateral eyebrows
Tripler response o is replaced by blanching of skin
|Sliding of superficial layers of skin on the deeper layers when a tangential force is applied with the pulp of thumb, especially over bony prominences|
|Staphylococcal scalded skin syndrome-
Toxic epidermal necrolysis
Epidermolysis bullosa congenital
Most great people have attained their greatest success just one step beyond their greatest failure.- Napoleon Hill
ELEVENTH HOUR SKIN 162
|Appearance of lesions at the site of trauma|
|Nikolsky sign present||Absent|
|Bullae are intraepidermal and flaccid||Bullae are subepidermal and tense|
|Mucosa involved||Mucosae are not involved|
|Involves upper part of body||Lower part of body|
|Prognosis poor||Prognosis good|
Immunoflorescence shows intercellular Ig G deposits in the fish net pattern
|bb||Inverted saucer appearance|
|ll||Bilaterally symmetrical, small, oily lesions. Sensations present|
|tt||Sensations are absent.|
|BT||Satellite lesions are seen|
|Black piedra||Piedra hortai|
|White piedra||Trichosporon bigelli|
|Apple jelly granulation tissue
pale scanty granulation tissue base
|Necrotic tissue with slough||Spreading ulcer|
|Wash leather slough||Syphilitic ulcer|
*Butcher’s wart / Anatomists wart- Cutaneous tuberculosis / verrucosa cutis
Slowly progressive asymptomatic lesion that follows penetrating trauma
Treated with akt.
Seen in blacks. Caused due to close shaving of curved hair, which pierce the skin.
Treatment is to stop shaving.
The main purpose of eyebrows is to keep sweat out of the eyes.
ELEVENTH HOUR SKIN 163
Hypopigmented or hyperpigmented perifollicular finely scaly macules coalescing to form patches seen on upper arm, neck, trunk, underarms.
Caused by Malassezia furfur.
*Ping pong scabies- mite is transmitted from one house member to another.
*Inguinal bubo appears 2- 4 weeks after genital ulceration.
*Bull’s eye lesion or iris lesion or target lesion
Seen in erythema mutiforme
*Miyagawa’s granulocorpuscles are found in lymphogranuloma venereum, when smears are stained with Giemsa
*Commonest cause of photoallergic dermatitis in India is Parthenium
*Impetigo of Bockhart
Acute superficial folliculitis
Pustules heal without scarring.
*Lyell’s disease-Toxic epidermal necrolysis.
Linear petechial lesions found in scarlet fever in antecubital and Axillary folds.
*Desert sore / Veldt sore is a superficial ulcer caused by corynebacterium diphtheriae.
Caused by peptostreptococcus and staphylococcus aureus or enterobacteriaceae.
*Hot tub folliculitis
Caused by pseudomonas aeruginosa. Occurring 1-4 days after bathing in hot tubs, swimming pool or whirlpool.
*Rose spots of salmonellosis occur between umbilicus and nipples.
Rash is described as dew drops on rose petals
Man can live about forty days without food, about three days without water, about eight minutes without air, but only for one second without hope- Anonymous
ELEVENTH HOUR SKIN 164
|single skin patch||paucibacillary
|Number of skin lesions||1||2-5||6 or more|
|Nerve involvement||Absent||Only one nerve may be involved||More than one nerve trunks involved|
|Treatment||Single dose of Rifampicin, Ofloxacin, Minocycline||600 mg rifampicin once a month,
100 mg of dapsone daily
|600 mg rifampicin once a month,
100 mg of dapsone daily
330mg of clofazimine Once a month and 50 mg daily
|Treatment duration||Single dose||6 monthly pulses must be completed in 9 months||12 monthly pulses must be completed in 18 months.|
|Enanthem||Pharyngeal||Koplik’s spot||Forchheimers spots|
|Exanthem||Macules-paules, vesicles, scbs||Maculopapular||Small amcules and paules|
|Lesion distribution||Centipetal||Face, trunk and limbs||Face trunk and limbs|
|Infective period||2 days before rash Appears to 6 days after beginnig of last crop of rash||5 days before to 5 days after the appearance of arsh||7 days before to 10 days afetr the appearance of rash|
Blondes have more hair than dark-haired people
ELEVENTH HOUR SKIN 165