Fig. 2: Molecular classification of thyroid nodules.

a Transcriptome-based unsupervised classification of PTC using non-negative matrix factorization (NMF) consensus identified 6 subtypes of thyroid nodules: Benign-I, Immune-enriched, Stromal, BRAF-enriched, Benign-II, CNV-enriched subtypes. b Box plots representing the proportion of tumors greater than 2 cm in diameter, lymph node metastasis, and stage III/IV tumors in each subtype. c Heatmap showing molecular PTC subtypes prediction in TCGA cohort using a predefined gene classifier generated by NMF.