There are many tumors that occur in subepidermal tissues. Most of them are benign tumors.
Lipomas yellow, moveable subcutaneous masses that are not premalignant.
Dermatofibroma are benign fibrous tumors due to growth of dendritic cells.
Keloids are nodular masses of exaggerated scar tissue. They do not become malignant.
Hemangiomas are abnomal overgrowths of blood vessels.
Telangiectasis is a local collection of blood vessels that are often called spider angiomas. Often associated with hormonal imbalances.
Nevus flammeus (port wine stain) is a common congenital condition composed of a colleciton of dilated dermal blood vessels.
Neurofibroma is a benign tumor of peripheral nerves. See Von Recklinghausen neurofibromatosis.
Kaposi sarcoma is a malignant tumor of vascular endothelial cells caused by a type of Herpes virus.