As chromosome 19q13 is nonrandomly rearranged in many human solid tumours including pancreatic carcinomas, astrocytomas, thyroid tumours, and ovarian cancers (Mitelman, 1994, pp 3067–3198), gene amplification is likely another mechanism for the elevated expression of hK6 in ovarian tumours. This evidence concerns the gene KLK6 and astrocytoma (excluding glioblastoma).