We found a radial outgrowth of keratinocyte epithelium from the circular biopsies. After 5 days of culture we found a significant growth of both cholesteatoma and skin-derived cells. Cholesteatoma samples showed higher growth rate as compared with skin control cultures from the same patient. Moreover, the cholesteatoma cells showed higher production of monocyte chemoattractant protein-1 (MCP-1) and interleukin (IL)-6 as compared with normal skin.
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