Objective: Mesenteric cysts are extremely rare lesions arising with an incidence of 1/20,000 admissions in children. Clinically, mesenteric cysts are generally comprehended as a unique diagnostic entity, although they exhibit histological diversity. The objective of this study was to determine the incidence and the histology of the mesenteric cysts in the pediatric age. Method: All cases of mesenteric cysts operated at the University Children's Hospital Belgrade over the 10-year period of 2002 to 2011 were reviewed using pathology reports from the files of the Institute of Pathology. Histological slides were re-examined and immunohistochemistry was applied, when necessary. Results: A total of 27 cases of mesenteric cysts were identified. Cysts of lymphatic origin (cystic lymphangiomas) were recorded in 12 patients (44 %), cysts of enteric origin -in 14 patients (52 %): 13 duplication cysts and one isolated enteric cyst of the mesenterium. Only one example of the cyst of mesothelial origin, i.e. benign cystic mesothelioma was diagnosed (4 %). The most frequent site was mesenterium and mesocolon (86 %), followed by omentum (7 %) and the retroperitoneum (7 %). Conclusion: Cysts of enteric origin are easily recognized. It is important to differentiate between cystic lymphangioma and cystic mesothelioma due to their different natural history. Objective: Myxoid liposarcoma belongs to the group of soft tissue sarcomas with lipomatous differentiation. Breast is a rarely affected (only 0.3 % of breast sarcomas), and often misdiagnosed. Method: A 67-years old woman presented with a painful timorous lump of the left breast. Mammography showed oval, lobulated lesion between medial quadrants, while ultrasonography revealed hipoechogenic, inhomogeneous nodule. Patient underwent core biopsy which was histologicaly inconclusive and followed by quadrantectomy with excision of both medial quadrants.