The case report of a 14-year old girl is given. In her spleen of the weight of 1580 g an irregular cyst of glossy inner surface and with striking trabeculation developed. It was filled with clear greenish liquid. The wall was formed by hyalinised collagen tissue which was covered by epidermoid and cuboidal epithelium on the inner surface. Vessel conglomerates were frequent, some bleeding or mononuclear infiltrates, foci of giant cell granulation tissue, lymphoid or fatty tissue were present.
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