DERMATOLOGY NEENA KHANNA IMAGES

Papule: solid, elevated lesion <0.5 cm

Nodule: solid lesion, >0.5 cm in diameter.

discoid plaque of psoriasis

vesicles

bullae

Pustule: pus-filled hollow lesion. This one shows

a distinct level of pus.

Scales: flakes formed by collection of horny

layer; loosely attached silver scales are typical of

psoriasis.

Erosion: due to complete or partial loss

of viable epidermis with no loss of the dermis.

Ulcer:

destruction of the epidermis and at least the upper

(papillary)

dermis

Pigmentation: epidermal pigmentation

dermal pigmentation is slate gray.

Lamellar ichthyosis

Collodion baby: newborn is ensheathed in a

shiny lacquer-like membrane.

Palmoplantar keratoderma:

Acquired keratoderma: callosities: ill-defined

thickening at site of constant friction

Epidermolysis bullosa: EB simplex: bullae

on hand and feet.

Angiofibromas: dome-shaped papules with

telangiectasia in the nasolabial folds and cheeks.

Incontinentia pigmenti: broad linear bands of

lesions consisting of hyperkeratotic papules and

nodules.

In this patient, some vesicular lesions are

present—this

is unusual, as the stage is in utero. Later the girl

child

developed whorled pigmentation.

Acanthosis nigricans.

Mucosal

involvement in malignant AN.

Darier’s disease: multiple discrete, crusted

follicular

and few nonfollicular papules.

Psoriasis of palms: well-defined, erythematous thickened plaques with silvery scales. Note the welldefined edge. On the palms and soles, the scales may be adherent.

Psoriasis of nail

Generalized pustular psoriasis: lakes of pus on

a fiery red background; pustules appear in waves and

can

be easily wiped off

Lichen planus: flat topped, polygonal, violaceous

papules, characteristically on flexors of wrist and

on shins.

hypertrophic lichen planus.

actinic lichen planus.

Lichen planus:: nails show thinning, distal splitting, tenting of nail plate and pterygium formation,

Large plaque parapsoriasis: erythematous,

scaly, indurated plaques on the covered parts of

body

Pemphigus vulgaris : flaccid blisters on normal

skin

acantholytic cells in

Tzanck

smear.

Pemphigus foliaceus: extensive areas of scaling

and crusting and no blisters. Note removal of scale-

crust

reveals a minimally moist area.

Pemphigus erythematosus: dry hyperkeratotic

scaly plaques on the malar region.

Bullous pemphigoid:

large hemorrhagic blisters some on normal skin.

Chronic bullous disease of childhood: string of

pearl appearance is typical.

Toxic epidermal necrolysis: bullae on dusky

erythema. Bullae rupture to leave large areas of

denuded

skin healing with hyperpigmentation.

Toxic epidermal necrolysis: hemorrhagic crusts

on lips and eye

involvement frequent.

Acute eczema: erythematous, edematous, exudative

crusted plaques with papulovesiculation

Infantile phase of atopic dermatitis: papulovesicular

lesions on face

Eczema herpeticum: generalized grouped

vesicles which rapidly evolve into polycyclic

erosions.

Infantile seborrheic dermatitis:

may involve other seborrheic

area.

Irritant contact dermatitis: due to overzealous

postoperative care.

Allergic contact dermatitis:

to rubber, manifesting as dermatitis to footwear.

Discoid eczema: coin shaped, vesicular,

crusted

plaques.

Acne vulgaris: A: polymorphic eruption of comedones, papules, pustules, nodules, and cysts.

Acne vulgaris: A: polymorphic eruption of comedones,

papules, pustules, nodules, and cysts

Acne fulminans: crusted lesions in presternal

area. Patient also had fever and myalgia.

Acne conglobata:

Rosacea:

rhinophyma: bulbous nose with patulous

follicular openings.

Fordyce’s spots: multiple, symmetric, flat

topped, yellow papules.

Alopecia areata:

multiple patches

of alopecia areata of eyebrows.

leucoplakia

Pachyonychia congenita: A: tenting of nail

plate present since birth.

Tinea unguium: thick, tunneled, discolored

nail plate with onycholysis

Piebaldism: A: depigmented macules with

islands of normomelanotic macules within

the area of depigmentation

in central area of trunk

.

Melasma: brown macular lesions with scalloped

margins on the cheeks and nose.

Freckles: brown macules on photo-exposed

parts. Note variation in color.

Raynaud’s phenomenon:

: finger tip gangrene

Arterial ulcer: on dorsal aspect of foot. Ulcer

has a pale floor covered with slough. There is often no

pigmentation or lipodermatosclerosis in surrounding

skin.

Stasis ulcer:

scarring and atrophy may develop when stasis

ulcer

heals.

Erythema:

discoid erythema due to fixed drug

eruption.

SJS–TEN complex: extensive erythema and

erosions in buccal mucosa and hemorrhagic crusting

on

lips.

Photoaged skin: wrinkled, leathery, and irregularly

pigmented. Inset: note comedones.

Chronic actinic dermatitis:

sparing of

depth of skin creases and depth of upper lids.

Side effects of steroids: : Cushingoid facies:

a common side effect of systemic steroids

Discoid lupus erythematosus:

early lesion.

Discoid lupus erythematosus:

: large lesion.

Lupus profundus: deep-seated, subcutaneous

nodule with overlying skin either normal (when

termed

lupus panniculitis) or showing lesions of DLE.

Dermatomyositis: periorbital edema and faint

lilac erythema (heliotrope erythema).

Pitted keratolysis: fine, punched-out often

elongated pits which become confluent to give a

cribriform

pattern.

Staphylococcal scalded skin syndrome:

superficial peeling of skin in thin sheets in an infant

Scrofuloderma

: mouth of the sinus is

undermined and hyperpigmented.

Tuberculosis verrucosa cutis: verrucous

plaque on trauma-prone sites. There is invariably

an underlying induration.

Borderline lepromatous leprosy: multiple

plaques present almost symmetrically.

Verruca vulgaris

: subungual lesion, distorting nail.

Primary herpetic infection

: polycyclic erosions

on labial mucosa.

Kerion: boggy swelling of scalp with easy

pluckability of the hair.

Oral candidiasis:

candidal leucoplakia:

rough white-grey plaque on dorsal aspect of tongue

with

erythematous halo.

Chromoblastomycosis: verrucous plaques on lower

extremity

Filarial lymphedema: : in late stages, hypertrophic

and verrucous skin with redundant skin folds.

Nevus of Ota.

pigmentation of sclera.

Basal cell carcinoma: noduloulcerative

lesion showing rolled, pearly edge and central

ulceration.

Squamous cell carcinoma: raised ulcer

with indurated base and everted margin (cauliflower-

like)

on the lower lip

Port-wine stain: : deeply erythematous,

telangiectatic slightly bosselated lesion on the face.

Usually present at birth: involvement of eyes

Lymphangioma circumscriptum:

: lesions in buccal mucosa.

Klippel–Trenaunay syndrome: vascular malformation,

venous varicosities with soft-tissue hypertrophy.

Xanthoma:

: tuberous xanthomas: yellow-colored nodules on

pressure points.

Paraneoplastic pemphigus:

recalcitrant oral lesions.