Inflammatory Skin: Pictures

Front 1

Back 1

Allergic contact dermatitis

Note the extensive spongiosis, lymphocyte exocytosis, papillary dermal edema

Front 2

Back 2

Allergic contact dermatitis

Front 3

Back 3

Seborrheic Dermatitis

Associated with?

Hint 3

family history

Obesity, Parkinson's, HIV, malabsorption, Alcoholism
Pitysporum ovale infection

Front 4

Back 4

Seborrheic dermatitis

Describe:

Hint 4

Spongiotic

with hyperkeratosis, psoriasiform hyperplasia, exocytosis, dermal perivascular lymphocytic infiltrate

Front 5

Back 5

Nummular eczema

Histology shows:

Hint 5

spongiotic dermatitis with parakeratosis, acanthosis, exocytosis, perivascular lymphocytic infiltrate

Front 6

Back 6

Lichen simplex chronicus

Front 7

Back 7

Lichen simplex chronicus

Note: irregular psoriasiform acanthosis, para/ortho keratosis, minimal spongiosis, dermal fibrosis

Front 8

Back 8

Pityriasis rosea

Front 9

Back 9

Pityriasis rosea

Note: subacute spongiotic change with mounds (instead of diffuse) parakeratosis.

Front 10

Back 10

Lichen striatus

Front 11

Back 11

Stasis dermatitis

Front 12

Back 12

Stasis dermatitis

Note the spongiotic dermatitis picture with dermal changes including capillary proliferation, hemorrhage, hemosiderin, and fibrosis-mainly in upper dermis

Front 13

Back 13

Psoriasis vulgaris

Front 14

Back 14

Psoriasis vulgaris

Note the epidermal parakeratosis, absence of granular layer, regular psoriasiform epidermal acanthosis with suprapapillary plate thinning, increased dermal vessels, sparse inflammation, comb-like appearance.

Front 15

Back 15

Pityriasis rubra pilaris

Front 16

Back 16

Pityriasis rubra pilaris

Note the alternating checkerboard para/orthokeratosis, acrotrichial parakeratosis also present

Front 17

What are the two important features of lichenoid interface dermatitis?

Back 17

Destruction of basal keratinocytes (cytoplasm becomes dyskeratotic-bright pink-and then nucleus extrudes)

Band-like lymphocytic infiltrate in papillary dermis

Front 18

Back 18

Lichen planus

Front 19

Back 19

Lichen planus

Note: acanthosis, lichenoid interface dermatitis, hyperkeratosis, sawtooth BM zone, Colloid bodies

Front 20

Back 20

Lichen nitidus

flesh colored pin-point papules on trunk, abdomen, forearms, genitals

Front 21

Back 21

Lichen nitidus

Note clawlike configuration of epidermis surrounding a papillary dermal infiltrate.