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Retraction artifact resulting in clear spaces around tumor cell nests is frequently seen in histologic material and may present difficulty in their differentiation from lymphovascular invasion. We(More)
TIA-I is a 15-kd cytotoxic granule-associated protein expressed in natural killer (NK) cells and cytotoxic T lymphocytes. TIA-1 expression was evaluated by paraffin immunohistochemistry in 115 T- or(More)