[Primary intraosseous liposarcoma - case report.].

: Primary intraosseous liposarcoma belongs to exceptional tumors rarely found on the sceleton. There are only several tens of cases described in literature and they are published as case reports. Because there is not enough experience, especially with diagnostics of this illness, it happens that it is considered as malignant fibrous histiocytoma, malignant mesenchymoma or with secondary infiltration of liposarcoma of soft tissue into the bone. Authors tried (in correlation with the clinical outcome studies of macroscopic samples with detailed histologic examination) to overcome diagnostic uncertainities of this case. Key words: primary intraosseous liposarcoma, maligant bone tumors.