A form of squamous cell carcinoma in situ, presenting as a persistent, well-demarcated, slowly enlarging, red, scaly plaque.
Also known as nummular eczema, this presents as intensely itchy, well-demarcated, coin-shaped, vesicular or scaly plaques.
A form of cutaneous lupus causing well-demarcated, erythematous, indurated plaques with adherent scale, follicular plugging, and central atrophy.
A rare condition with erythematous to hyperpigmented, keratotic papules that coalesce into a rough, scaly, macerated plaque in intertriginous areas.
Presents as extremely itchy, thick, hyperkeratotic, violaceous plaques and nodules, most commonly on the shins.
A more inflamed variant of pityriasis rosea with more erythema and scale.
A variant of pityriasis rosea where the rash is concentrated in the axillae and groin, rather than the trunk.
A chronic condition with large (>5cm), irregular, dusky red or brownish, slightly scaly, and atrophic patches, considered a precursor to mycosis fungoides.
The acute form of pityriasis lichenoides, presenting with papules that develop hemorrhagic or necrotic centers and scaly crusts.
A benign inflammatory disorder with recurrent crops of small, reddish-brown, scaly papules that can coalesce into plaques.
Following a herald patch, this eruption consists of multiple smaller, oval, pink plaques with a fine collarette of scale, oriented in a 'Christmas tree' pattern.
A rare condition with one or more large, perfectly circular, sharply defined, scaly patches on the trunk, often associated with systemic disease.
A papulosquamous disorder characterized by reddish-orange plaques, islands of sparing (unaffected skin), and prominent follicular papules.
The classic presentation is a well-demarcated, erythematous plaque with a thick, silvery-white, adherent scale.
A chronic condition with asymptomatic, discrete, elongated, pink-to-yellowish, slightly scaly patches ('digitate dermatosis').
A subtype of BCC that presents as a slowly growing, pink or red, slightly scaly plaque with a fine, thread-like pearly border.
The classic 'ringworm,' a fungal infection presenting as an annular, erythematous, scaling plaque with a raised, active border and central clearing.
