Please use this identifier to cite or link to this item: https://doi.org/10.1097/DAD.0b013e3181ea1198
Title: Extensive hyperpigmented plaques in a Chinese Singaporean woman: A case of cutaneous plasmacytosis
Authors: Lee, J.S.-S.
Chiam, L.
Tan, K.B.
Salto-Tellez, M. 
Tan, S.H.
Ong, B.H.
Ng, S.K.
Keywords: Chinese
cutaneous plasmacytosis
hypergammaglobulinaemia
plasma cells
polyclonal
systemic plasmacytosis
Issue Date: Jul-2011
Citation: Lee, J.S.-S., Chiam, L., Tan, K.B., Salto-Tellez, M., Tan, S.H., Ong, B.H., Ng, S.K. (2011-07). Extensive hyperpigmented plaques in a Chinese Singaporean woman: A case of cutaneous plasmacytosis. American Journal of Dermatopathology 33 (5) : 498-503. ScholarBank@NUS Repository. https://doi.org/10.1097/DAD.0b013e3181ea1198
Abstract: Cutaneous plasmacytosis is a rare disease entity presenting with multiple extensive red-brown plaques, histopathology showing marked hyperplasia of mature polyclonal plasma cells, and polyclonal hypergammaglobulinemia on serum protein electrophoresis, in the absence of an underlying secondary cause. We report in this article the first case of cutaneous plasmacytosis from Singapore. A 33-year-old Chinese woman presented with mildly pruritic reddish brown papules and plaques over her trunk and arms for 2 years. Physical examination, laboratory investigations, and radiographic examination were negative for systemic involvement and lymphadenopathy. Serum immunoelectrophoresis showed polyclonal hypergammaglobulinemia with immunoglobulin G and immunoglobulin A. Two sets of skin biopsies performed 2 years apart essentially showed similar histopathological findings of a superficial and deep perivascular infiltrate with numerous mature plasma cells and small typical lymphocytes. There were lymphoid follicles with well-formed germinal centers and mantle zones, surrounded by mature lymphocytes. No light chain restriction was present on immunohistochemistry, and polymerase chain reaction for heavy chain gene rearrangement was negative for monoclonality. Despite potent topical corticosteroids and 8 months of phototherapy with narrow band ultraviolet light, there was no improvement. Intralesional triamcinolone injections to a few lesions afforded temporary relief of itch and flattening of lesions. Copyright © 2011 by Lippincott Williams & Wilkins.
Source Title: American Journal of Dermatopathology
URI: http://scholarbank.nus.edu.sg/handle/10635/109341
ISSN: 01931091
DOI: 10.1097/DAD.0b013e3181ea1198
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