The product of 3β,5α,6β-triol metabolism, 3β,5α,6β-triHBA, was found in NPC (1–3.5 ng/mL), NPB (1–2 ng/mL) and one of the two LALD (0–1.5 ng/mL) plasma samples (Fig. 3B), but was absent from controls and carriers (≤0.1 ng/mL). The gene discussed is NPB; the disease is nasopharyngeal carcinoma.