CD24 and syringocystadenoma papilliferum: Primary mesenchymal surface markers such as CD24, CD44, CD49d, CD51/61, CD56, CD73, CD90, CD105, CD106, CD146, STRO-1, Scleraxis, Nestin, and Survivin are expressed in SCAP, among which CD24 is a specific SCAP marker [70, 88].