A child is presenting with erythmatous follicular papules on trunk. There are areas of normal skin within the lesions. There is thickening of Palms & soles. This child is suffering from –
Clues are :-


Erythmatous follicular papules
Involvement of trunk
Thickening of Palm and soles (Palmo-Planter keratoderma)
The most important one is presence of normal skin within the lesions


Diagnosis is nothing other than pityriasis rubra pylaris.
Pityriasis rosea
Pityriasis rubra pilaris
Psoriasis
Seborrheic dermatitis