No abstract available.
Pityriasis Lichenoides* ; Pityriasis*

No abstract available.
Pityriasis Lichenoides* ; Pityriasis*

BACKGROUND: Pityriasis rosea is an acute inflammatory dermatosis with an unproven etiology. The typical clinical feature consists of an initial, single herald patch followed by development of smaller, disseminated, papulosquamous, ovoid macules. However, an unusual papular type of pityriasis rosea is relatively common in children and it shows similar clinical characteristics to pityriasis lichenoides. OBJECTIVES: Our purpose was to observe the clinical and histologic features of pityriasis rosea and pityriasis lichenoides, and differentiate two diseases in children. METHODS: Sixteen children with pityriasis rosea and nineteen children with pityriasis lichenoides were investigated clinically and histologically. RESULTS: 1. Clinically, pityriasis rosea may be differentiated from pityriasis lichenoides by the existence of herald patch, short duration, the uniformity of size and shape, and residual pigmentation. 2. Focal parakeratosis, intraepidermal vesicle and papillary derma edema are more common in pityriasis rosea. In contrast, deep dermal infiltration, dyskeratosis, epidermal necrosis and confluent parakeratosis are more common in pityriasis lichenoides. 3. Comparing to the plaque type, a papular type of pityriasis rosea shows more involvement in the extremities with longer duration. Histologically, parakeratosis and papillary dermal edema are less and spongiosis is more commonly observed in papular type. CONCLUSIONS: Pityriasis rosea in children often shows papules especially on the extremities, similar to that of pityriasis lichenoides. However, from the results in this study, we believe that two diseases can be differentiated if both clinical and histologic findings are carefully studied.
Child* ; Edema ; Extremities ; Humans ; Necrosis ; Parakeratosis ; Pigmentation ; Pityriasis Lichenoides* ; Pityriasis Rosea* ; Pityriasis* ; Skin Diseases

No abstract available.
Leuprolide* ; Pityriasis Rosea* ; Pityriasis*

No abstract available.
Methotrexate* ; Pityriasis Lichenoides* ; Pityriasis* ; Prednisolone*

No abstract available.
Child* ; Humans ; Pityriasis Lichenoides* ; Pityriasis*

No abstract available.
Pityriasis Rubra Pilaris* ; Pityriasis*

: Pityriasis lichenoides (PL) is an inflammatory papulosquamous condition that exists in a continuous spectrum that consists mainly of pityriasis lichenoides et varioliformis acuta and pityriasis lichenoides chronica (PLC). The condition has been reported to erupt in response to infections, radiocontrast media, medications and vaccines. Most case reports on vaccine-related eruption involve the acute PL, hence, this report aimed to present a case presenting with lesions of the chronic variant. : A 21-year-old female presented with multiple erythematous to hyperpigmented ill defined plaques, some ulceronecrotic, topped with fine scales and excoriations on the upper and lower extremities, periumbilical area and back of 4 months duration, following rabies vaccinations. : Histopathologic findings, including interface dermatitis, parakeratosis, spongiosis, and mixed inflammatory infiltrates, confirmed the diagnosis of PLC. The patient responded well to oral corticosteroids and heliotherapy. PL is rare and requires additional research. The potential role of vaccination as an etiologic agent represented a crucial area of this investigation. Additionally, heliotherapy should be considered as a viable therapeutic alternative when phototherapy is not feasible.. Further research is needed to elucidate the pathogenesis of PL and establish evidence-based treatment protocols.
Pityriasis lichenoides chronica ; Pityriasis lichenoides ; heliotherapy ; vaccine

We report herein a case of pityriasis lichenoides et variloiformis acuta in a 48- year-old man, who has wide spread erythematous macule, papule, vesicle, hemorrhagic vesicle and reddish-brown crust on the neck, trunk, axillae and both extremities. He was treated successfully with tetracycline 2. 0 gm a day for 4 weeks.
Axilla ; Extremities ; Neck ; Pityriasis Lichenoides* ; Pityriasis* ; Tetracycline

Pityriasis lichenoides chronica is characterized by unknown etiology, chronicity and by being essentially asymptomatic and refractory to therapy. Nine patients with pityriasis lichenoides chronica were treated with orally administrated 8-Methoxypsoralen and UVA irradiation(PUVA Therapy). After S-45 PUVA treatments, lesions were completely cleared.
Humans ; Methoxsalen ; Pityriasis Lichenoides* ; Pityriasis* ; PUVA Therapy*