Langerhans cell

But cyclin D1 expression is not exclusive to mantle cell.

It can be seen in T-cell lymphomas, histiocytic neoplasms like Langerhans or Eldheim-Chester disease, hairy cell leukemias, although often a bit weakly, and some but not all myelomas, you know, those that carry the 11-14 rearrangement.

And actually, it's expressed in a bunch of solid organ cancers as

well.