Table 3.

Analysis by cell-block technique of the two demarcated areas in the cytogram of MeT5A cells after incubation with crocidolite.

Area	P1	P2
Cells without crocidolite (%)	47.6	5.7
Cells including less than 5 bundles of crocidolite fiber (%)	42.4	18.2
Cells including 5 or more bundles of crocidolite fiber/crocidolite in clumps (%)	10	76.1
Total counted cell numbers	500	473

MeT5A cells were grown to 70% confluence (2 × 10⁴ cells/cm², 24 h before) and incubated with 20 µg/cm² crocidolite for 2 h.