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| Fig. 46.6 Pseudolymphoma. Patient with plaques on nodules of the right cheek and forehead. (Courtesy of the Fitzsimons Army Medical teaching files.) |
This term represents several clinical entities that probably have multiple etiologies. Included are lymphocytoma, Spiegler-Fendt sarcoid, lymphadenosis benigna cutis, and Jessner’s benign lymphocytic infiltrate. In most cases, the etiology is unknown, although chronic arthropod bite reactions are an etiologic stimulus in some cases. The lesions present as indolent single or grouped, red or purple nodules or plaques on the head, neck, and upper trunk, and other anatomic sites can be involved (Fig. 46-6). The infiltrate may show either B- or T-cell predominance. Some cases can be difficult to differentiate from lymphoma, and the patient must be followed before a definite diagnosis can be made.
Ploysangam T, Breneman DL, Mutasim DF: Cutaneous pseudolymphomas,
J Am Acad Dermatol 38:877–895, 1998.
