Osteoarthritis progresses further with obliteration of the joint space. The appearance of subchondral cysts (cysts in the bone underneath the cartilage) indicates the erosive phase of disease progression in osteoarthritis.
Keratosis pilaris is a common and harmless condition where the skin becomes rough and bumpy, as if covered in permanent goose pimples.
The exact cause of keratosis pilaris is unknown. There seems to be a problem with overproduction of the keratin part of the skin called hyperkeratinization. A majority of patients with keratosis pilaris have a known genetic predisposition and affected family members.