Fourteen patients had primary ovarian lymphoma, while eighteen patients had secondary ovarian involvement. There was no significant difference in survival rates between primary and secondary involvement with diffuse large B-cell lymphoma (DLBCL), the most common subtype. The 5-year overall survivals of primary and secondary involvement with DLBCL were 70.0% and 59.3%, respectively. The localized bilateral ovarian involvement showed poorer survival compared to stage III/IV patients with secondary ovarian involvement. Treatment outcomes of secondary ovarian involvement in non-Hodgkin's lymphoma were comparable to those of primary ovarian involvement, suggesting that ovarian involvement does not necessarily predict a worse prognosis for NHL patients.
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