Exp Ther Med 2014 Dec 7;8(6):1927-1933. Epub 2014 Oct 7.
Department of Pathology, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710068, P.R. China.
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Am J Surg Pathol 2012 Jul;36(7):1021-9
Kempf und Pfaltz Histologische Diagnostik, Seminarstrasse 1, CH-8042 Zurich, Switzerland.
Pityriasis lichenoides comprises a clinicopathologic spectrum of cutaneous inflammatory disorders, with the 2 most common variants being pityriasis lichenoides et varioliformis acuta (PLEVA) and pityriasis lichenoides chronica. The aim of the study was to describe 13 cases of a unique PLEVA variant characterized in the conspicuous CD30 component and thus mimicking lymphomatoid papulosis (LyP), a condition currently classified in the spectrum of CD30 lymphoproliferative disorders. The cohort included 10 female and 3 male patients whose ages at diagnosis ranged from 7 to 89 years (mean 41 y; median 39 y). Read More
J Cutan Pathol 2001 Oct;28(9):453-9
Department of Dermatology, Seoul Paik Hospital, Inje-Univeristy, Seoul, Korea.
Background: Pityriasis lichenoides et varioliformis acuta (PLEVA) and lymphomatoid papulosis (LyP) are benign self-healing cutaneous eruptions that may be clinically and histologically similar. The purposes of this study were to evaluate immunohistological characteristics of PLEVA and LyP and to investigate whether Epstein-Barr virus (EBV) may be present in PLEVA and LyP.
Methods: We performed an immunohistochemical staining in 12 cases of PLEVA and 8 cases of LyP using nine antibodies for CD3, CD4, CD8, CD30, CD45RO, CD56, CD79, cutaneous lymphocyte-associated antigen (CLA), and TIA-1. Read More
J Am Acad Dermatol 1987 Mar;16(3 Pt 1):559-70
Pityriasis lichenoides et varioliformis acuta and pityriasis lichenoides chronica are idiopathic, papular eruptions that exhibit certain clinicopathologic similarities to each other and to lymphomatoid papulosis. In order to determine if these disorders are also similar immunologically, we studied the immunopathology of five biopsy specimens from three cases of pityriasis lichenoides et varioliformis acuta and three biopsy specimens from three cases of pityriasis lichenoides chronica. We then compared them to our prior immunohistologic study of nine cases of lymphomatoid papulosis. Read More
J Dermatol 1991 Oct;18(10):580-5
Department of Dermatology, Jikei University School of Medicine, Tokyo, Japan.
We have compared the clinical and histopathological features of 6 patients with lymphomatoid papulosis (LP) and 14 patients with pityriasis lichenoides et varioliformis acuta (PLEVA). There were some differences between the clinical features in the two diseases, including the size and appearance of skin lesions and the duration of the course of disease. Ki-1 Ag positive, large, atypical, lymphoid cells were always seen in lymphomatoid papulosis; none of lymphoid cells of pityriasis lichenoides et varioliformis acuta demonstrated this antigen. Read More