Het mesenteriale, omentale en retroperitoneale kystische lymfangioom

– - Cystic intra-abdominal lymphangiomas are rare congenital lesions. Cystic lymphangiomas were encountered in the omentum of a boy aged 2½ years and retroperitoneally in a boy aged 6 years. The pathogenesis is discussed. The differential diagnosis currently is based largely on ultrasonography which provides characteristic images. Complete removal of the affected tissue is usually possible.