[Multiple primary cutaneous plasmacytoma].
BACKGROUND
Primary cutaneous plasmacytoma is a rare form of cutaneous B-cell lymphoma.


METHODS
A 51 year-old male with an unremarkable history gradually presented erythematous papulonodular lesions that had appeared gradually over the whole body throughout a two-year period and showing histologic and immunohistochemical features of cutaneous plasmacytoma. Staging investigations confirmed the primary character of the disease, and because of this and the absence of functional impairment, we opted for therapeutic abstention. No progression was noted after 4 years of regular monitoring.


CONCLUSIONS
Primary cutaneous plasmacytoma (PCP) is characterized by clonal proliferation of plasma cells in skin. Multiple PCPs are extremely rare and to date have been treated in most cases by chemotherapy, either with or without radiotherapy. The prognosis is poor, with 2-year survival of only 25%. The present case is original, being the only one to our knowledge in which therapeutic abstention was followed by a lack of progression after 4 years of regular follow-up. Consequently, certain indolent forms of PCP do not warrant automatic institution of chemotherapy.
Service de dermatologie, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France. Electronic address: nausicaa.malissen@yahoo.fr.
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N
Malissen
Service de dermatologie, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France.
C
C
Fabre
Service d'anatomopathologie, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France.
J-M
JM
Joujoux
Service d'hématologie et oncologie médicale, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France.
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Bourquard
Service de dermatologie, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France.
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M
Dandurand
Service de dermatologie, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France.
M
M
Marque
Service de dermatologie, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France.
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P
Stoebner
Service de dermatologie, CHU de Nîmes, place du Pr R. Debré, 30029 Nîmes cedex 9, France.
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L
Meunier
D006801:Humans; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000473:pathology; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000628:therapy; D010954:Plasmacytoma / Q000473:pathology* / Q000628:therapy; D012878:Skin Neoplasms / Q000473:pathology* / Q000628:therapy
Abstention; Plasmocytome cutané multiple; Primary cutaneous plasmacytoma; Therapeutic abstention; Traitement; Treatment