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Histological sections: confrontation type. (a) Non‐invasive confrontation of meningioma‐derived cells (T) with host tissue (H) after 4‐day incubation. No invasion of tumour‐derived cells into the host tissue. (b) Invasive confrontation of tumour cells derived from a malignant brain tumour (T) with host tissue (H) after 4‐day incubation. Invasive pattern of tumour derived cells into the host tissue.
