An acquired hair shaft defect where air-filled "bubbles" form within the shaft due to heat damage, making the hair brittle.
A condition where anagen (growing) hairs are easily and painlessly pulled from the scalp because of a defect in inner root sheath adhesion.
A genetic disorder causing beaded hair, where the hair shaft has regular, periodic constrictions, giving it a "string of beads" appearance and making it fragile.
A rare condition where alternating light and dark bands are visible along the hair shaft due to air-filled cavities, giving the hair a characteristic "ringed" or sparkly appearance.
A rare hair shaft abnormality where a single hair shaft splits and then rejoins, forming two parallel shafts.
A condition where multiple, separate hair shafts emerge from a single follicular opening.
A condition where the hair shaft is flattened and twisted on its own axis at irregular intervals, making it brittle and spangled in appearance.
Also known as uncombable hair syndrome, this is a condition of silvery-blond, dry, frizzy hair that stands out from the scalp and cannot be combed flat.
Also known as "bamboo hair," this is a pathognomonic sign of Netherton syndrome where the hair shaft telescopes into itself at nodes, resembling a ball-and-socket joint.
The most common hair shaft defect, where the hair develops nodular swellings along the shaft that represent sites of cuticular fracture, looking like two brooms pushed together.
A group of genetic disorders characterized by sulfur-deficient, brittle hair that shows a characteristic "tiger tail" banding pattern under polarizing microscopy.
A congenital condition of unusually fine, tightly curled, and often hypopigmented hair, which can be localized or diffuse.
