Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Quantitative scale (QS) and sample numbers of detected EGFR and KRAS mutations.
| QS | No. of tumor cells | No. of EGFR mutations detected | No. of KRAS mutations detected |
|---|---|---|---|
| C1+ | >20–100 | None | None |
| C2+ | >100–1,000 | None | 1 |
| C3+ | >1,000–5,000 | 1 | 7 |
| C4+ | >5,000–10,000 | 4 | 8 |
| C5+ | >10,000 (countless) | 2 | 3 |
