miRNA expression in cyclin D1–positive and –negative MCL. (A) MCL classifier obtained from cryopreserved tissues showed similar predictive power in FFPE tissues and cyclin D1–negative MCL classified as MCL. (B) Unsupervised clustering based on miRNA profiles showed distinct clusters of cyclinD1-negative and cyclin D1–positive MCL patients. (C) Differential expression of miRNA between cyclin D1–negative and cyclin D–positive MCL patients.