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Ki-1 Large Cell Lymphoma with Regressing Lesions in a Child
Authors:Achilé  a Lisboa Bittencourt,M.D., Nubia Mendonç  a,M.D.,Luiz Antonio Rodrigues de Freitas,M.D., Bertram Schnitzer
Affiliation:Department of Pathology, Hospital Martag?o Gesteira, Salvador, Bahia, Brazil.
Abstract:
An 8-year-old boy was seen with a cutaneous Ki-1 anaplastic, large cell lymphoma with multiple lesions. Some of the lesions showed spontaneous regression. During more than seven years of disease no systemic involvement was observed, but recurrent, self-healing lesions did appear. Histopathologic examination of five lesions revealed a variety of findings, from an inflammatory infiltrate to a highly anaplastic pattern. The neoplastic cells expressed Ki-1 and leukocyte common antigens. Ultrastructurally, those cells showed ruffled indentations. The differential diagnosis includes microvillous malignant lymphoma. The patient has had a four-year follow-up without relapses.
Keywords:
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