When the proximal nail fold overgrows and invades the nail bed, there arises a nail disorder which is termed as pterygium of the nail. This disorder refers to the unexpected penetration of nail fold into the nail bed. The origin of this disorder is the matrix of the nails. Pterygium is a nail abnormality that is either dorsal or ventral depending on the site of involvement. Dorsal pterygium occurs when the proximal nail fold fuses with the underlying matrix and, subsequently, with the nail bed. As a result, the nail plate is divided into 2 lateral segments that progressively decrease in size as the pterygium widens.
pterygium nails pictures, photos
Pterygium is a disorder that occurs by an overgrowth of the proximal nail fold on to the nail bed. In severe cases the nail plate is eventually replaced with scar-like tissue. The condition typically effects the nail matrix, nail bed and nail plate but sometimes all parts of the nail unit are involved. Two types of the condition can occur. Deformities are often considered together with dystrophies, but the two are slightly different; deformities are generally considered to be gross changes in nail shape, whereas dystrophies are changes in nail texture or composition (eg, onychomycosis ). About 50% of nail dystrophies result from fungal infection. Pterygium is an irreversible scarring of the nail matrix resulting in a split nail. The deformity is most often post-traumatic, though it can be the end result of aggressive inflammatory diseases involving the nail matrix like nail lichen planus, graft versus host disease, or autoimmune bullous disorders like cicatricial pemphigoid. Medical literature defines pterygium (terr-idge-ee-uhm) as any abnormal growth of skin that becomes stretched into a wing-like shape. In other words, unless the skin is abnormal and stretched, it is NOT pterygium. This word should NEVER be used to describe the cuticle or any normal growth of skin.
Figure 2 from Pterygium of the nail. Semantic Scholar
"Pterygium of the nail can be described as an adhesion between the skin surrounding the nail (dorsal nail fold) and the area under the nail plate, which eventually leads to partial nail destruction," says Dr. Andrea Cambio. There are a number of causes of pterygium. Pterygium of the Nail This photo shows pterygium (scarring from the base of the nail outward in a V shape) and atrophy (wasting away) of several nails, which can be seen in people who have lichen planus. Pterygium of the Nail Pterygium of the Nail This photo shows pterygium (scarring from the base of the nail outward in a V shape) and atrophy (wasting away) of several nails, which can be seen in people who have lichen planus. © Springer Science+Business Media In these topics Deformities, Dystrophies, and Discoloration of the Nails Nail Deformities and Dystrophies. Brought to you by Merck & Co, Inc., Rahway, NJ, USA (known as MSD outside the US and Canada) — dedicated to using leading-edge science to save and improve lives around the world. Learn more about the MSD Manuals and our commitment to Global Medical Knowledge. About.
3 Nail lichen planus with pterygium formation. Download Scientific Diagram
Paronychia Transverse ridging of a nail may be a sign of eczema , paronychia, psoriasis, parakeratosis pustulosa, and shrimp nail. Beau line Beau line A Beau line is a transverse depression affecting all nails, due to acute systemic illness stopping nail growth. Onychorrhexis Effect of ageing Lichen planus Darier disease pterygium. Pterygium is a disorder characterized by an overgrowth of the proximal nail fold onto the nail bed. Pterygium is derived from a Greek word, pterygion, which means "little wing" or "fin.". It is also referred to as wing-like. By definition, pterygium forms if there is scar tissue in the nail matrix.
Pterygium is a medical condition in which the skin grabs onto the nail plate and grows forward as the nail grows out, making the nail look as if the cuticle is growing over it. In even more unusual cases, the skin of the fingertips is attached to the underside of the nail. The nail itself may be thin, fragile, pitted, or ridged—or there may. Dorsal pterygium is the growth of a projection of the proximal nail fold that fuses with the underlying matrix and, subsequently, with the nail bed. As a result, the nail plate is divided into 2 lateral segments.
Pterygium Nails Causes Nail Ftempo
A pterygium is a growth of the conjunctiva or mucous membrane that covers the white part of your eye over the cornea. The cornea is the clear front covering of the eye. This benign or. Dorsal pterygium is an irreversible and classic finding in nail lichen planus. The disease may lead to permanent disfigurement, which has both functional and psychological consequences. Early diagnosis and prompt treatment are also important to prevent the development of pterygium.
