Cowden syndrome (CS) is a difficult to recognize, under-diagnosed genodermatosis characterized by the presence of multiple hamartomas in various tissues and an increased risk for malignancies of the breast, thyroid, endometrium, kidney and colorectum. When CS is accompanied by germline <i>PTEN</i> mutations, it belongs to the PTEN hamartoma tumor syndrome (PHTS; see this term) group.

Digits that appear disproportionately short compared to the hand/foot. The word brachydactyly is used here to describe a series distinct patterns of shortened digits (brachydactyly types A-E). This is the sense used here.