RESUMO
Primary ovarian lymphoma presenting with ovarianmass as a primary disease is extremely rare. Wereport here a case of primary ovarian B-cell non-Hodgkin's lymphoma with bilateral involvementwhich was managed by surgery and chemotherapy.A 35 years old woman was admitted with signs andsymptoms suggestive of ovarian cancer. Thediagnosis of malignant lymphoma was establishedafter bilateral adnexectomy, histological andimmunohistochemical study of the excised tissue.The stage was I ES according to Ann-Arbor stagingsystem. The patient was planned for R-CHOPchemotherapy, but due to unaffordbility patient wastreated with 06 cycles of standard CHOP regimenand had completed her treatment. She has now beenon follow-up and is without disease from 15 monthsof treatment