Objective: Well-differentiated papillary mesothelioma occurs rarely in the paratesticular region, with only a few published case reports. Method: We describe a case of a 37-year-old man who initially presented with discomfort in the left testis and underwent resection of a hydrocele in the left testis. A hydrocelectomy was performed, during which a pedunculated mass, 2,5 cm in greatest dimension, was found attached to the testis. Results: Microscopically, the mass was composed of multiple branching papillary structures with fibrovascular cores covered by a single layer of low cuboidal to cuboidal cells with predominantly bland nuclear and cytologic features and rare microscopical necrosis. Immunohistochemical staining for calretinin and cytokeratines 5/6 was positive and proliferative marker Ki67 was <2 %. Accordingly the diagnosis of a well-differentiated papillary mesothelioma was made. The patient has not received additional therapy and is disease free 15 months after diagnosis. Conclusion: In conclusion, we report a rare case of a welldifferentiated papillary mesothelioma of the tunica vaginalis of the testis. The combination of benign and semimalignant characteristics can make the diagnosis of such a lesion problematic and pathologic distinction from malignant mesothelioma is crucial, although it may be difficult because of the variability of associated histologic features. Objective: Lipoma of the bone is a rare benign adipocytic tumor that arises intraosseous and rarely on the cortex or on the surface of the bone (parosteal lipoma). Parosteal lipoma affects the long bones diaphysis of adults over 40 years old. Method: We present the case of a 23 years old female with clinical diagnosis of femoral exostosis. Conventional radiographs shows the presence of a 5 cm length area of lucency on the femoral metaphyseal surface with a periostal reaction at the base of the lesion. Results: Gross examination reveals a 5 cm osseous tumor, whitish on the surface and yellow on the section. On microscopic examination there are mature adipocytes with small foci of bone scattered throughout the adipocytes and hyaline cartilage at the perifery of the lesion. The gross and microscopic examinations correlated with conventional radiographs led us to diagnosis of parosteal lipoma.