Cutaneous Pseudolymphoma: A Case Report.

Pseudolymphoma is a benign, reversible, inflammatory, reactive, and polyclonal lymphocyte proliferation, which regresses spontaneously or heals after elimination of the causal factor. A female patient, aged 33, presented with a painful, erythematosus, radiant tumor formation on the skin in the temporal region. The patient had enlarged lymph nodes on the right side of the neck before the appearance of that tumor formation. The dermatoscopic finding was nonspecific. After the tumor biopsy was performed, the diagnosis of reactive lymphatic proliferation - pseudolymphoma or cutaneous lymphoma of B-cell immunophenotype - was established histologically. After we completely excised the skin change, the immunohistochemical finding indicated fluoride skin lymphocyte hyperplasia of B- and T-lymphocytes. The results of other findings were normal (serologic test for Borrelia burgdoferi, ultrasound of the cervical and supraclavicular lymph nodes, as well as ultrasound of the abdomen and axillary and inguinal regions). However, the etiology of the disease remains unknown. This case report confirms that the correlation between clinical presentation, dermatoscopic examination, histologic and immunohistochemical analysis, and the therapy response is crucial for diagnosis of pseudolymphoma and patient outcome.