Chromosome analysis of ThyL‐6 cells. The typical karyotype of ThyL‐6 cells was 51, XY, +3, i(3) (q10), +7, add(7)(q11), dic(7)t(7;17) (p11;p11), +8, add(8)(p11), i(8)(q10), –9, –13, +15, i(15)(q10), der(16)t(1;16) (q11;q24), der(16)t(9;16)(q11;q24), add(21)(p11), der(?)t(?;q11), +2mar [18]/51, idem, ‐der(?)t(?;q11), + mar [2].