What is the probability that offspring of two heterogeneous parents will be homologous recessive?
Matrixectomy: If your doctor believes the destruction of the nail matrix is necessary after removing the toenail, he or she will perform a partial or full matrixectomy (or matricectomy), which is permanent toenail removal by applying a chemical agent (most commonly phenol or sodium hydroxide) to the matrix.
Pterygium removal surgery eliminates the abnormal tissue from the cornea and sclera (white of the eye). The older, standard surgical technique left a bare hole in the conjunctiva (the surface of the eye) where the pterygium was removed. Unfortunately, this led to a high rate of pterygium regrowth.