Mucous cysts are pseudocysts (cystic structures lacking a true lining) that usually appear on the middle or index finger of the dominant hand; toe involvement is uncommon. Although most mucous cysts ...

Verruca vulgaris (VV), or the common wart, is a benign growth of the skin or mucous membranes. VV lesions present as firm, hyperkeratotic, raised lesions with a rough or cauliflower-like surface. They ...

Cystic fibrosis mucus can cause blockages and increased risk of infections. Cystic fibrosis treatments focus on reducing and clearing the mucus. Cystic fibrosis is a genetic condition that causes ...

Medically reviewed by Lauren Schlanger, MD Key Takeaways A ganglion cyst is the most common cause of a lump on your hand or wrist and often feels round or oval. A carpal boss is a hard, bone-like lump ...