Cochrane AbstractsSearch Cochrane Abstracts*ABCDEFGHIJKLMNOPQRSTUVWXYZ*ABCDEFGHIJKLMNOPQRSTUVWXYZX. TUMOURS AND CYSTS OF THE SKIN AND APPENDAGESX1-X2 Keratinocyte cancers and precancer of the skin e.g. Bowen's disease, squamous cell carcinoma, basal cell carcinoma ("rodent ulcer")X4 Malignant melanomaXanthinesXerostomiaX-linked hypophosphatemiaX-LINKED HYPOPHOSPHATEMIA