Pierre, 48 years old, Inflammatory flare-up

It was atopic dermatitis.

Let’s rule out differential diagnoses:

• Psoriasis

Also found in typical locations: elbows, knees, lumbar region, scalp, +- nails with a context or history of psoriasis, without the atopic context or animal contact.

Histology if necessary.

• Atopic dermatitis:

Flare-ups with periods of remission, history of atopy, pruritus, xerosis.

Location of the lesions: face, skin folds, limbs.

Jagged eczema lesions.

No infectious contact or animals.

• Mycosis (ringworm):

Lesions with geographic edges, inflammatory at the edges, with scarring at the centre, centrifugal, recent +- pruritic. Animal contact and mycology if necessary.

It is indeed atopic dermatitis.

Let’s rule out differential diagnoses:

• Psoriasis

Also found in typical locations: elbows, knees, lumbar region, scalp, +- nails with a context or history of psoriasis, without the atopic context or animal contact.

Histology if necessary.

• Atopic dermatitis:

Flare-ups with periods of remission, history of atopy, pruritus, xerosis.

Location of the lesions: face, skin folds, limbs.

Jagged eczema lesions.

No infectious contact or animals.

• Mycosis (ringworm):

Lesions with geographic edges, inflammatory at the edges, with scarring at the centre, centrifugal, recent +- pruritic. Animal contact and mycology if necessary.

PSORIASIS:

It was atopic dermatitis.

Let’s rule out differential diagnoses:

• Psoriasis

Also found in typical locations: elbows, knees, lumbar region, scalp, +- nails with a context or history of psoriasis, without the atopic context or animal contact.

Histology if necessary.

• Atopic dermatitis:

Flare-ups with periods of remission, history of atopy, pruritus, xerosis.

Location of the lesions: face, skin folds, limbs.

Jagged eczema lesions.

No infectious contact or animals.

• Mycosis (ringworm):

Lesions with geographic edges, inflammatory at the edges, with scarring at the centre, centrifugal, recent +- pruritic. Animal contact and mycology if necessary.