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The study found that pili bifurcati causes hair to intermittently split into two branches, each with its own outer layer.

In this study, researchers developed a three-dimensional ultrastructural analysis tool using serial block-face scanning electron microscopy to reveal detailed nerve networks and muscle structures in human skin tissues, demonstrating the technique's potential to study structural changes in aging or disease.

This review discusses the prognosis and treatment options for hair shaft disorders, finding no studies but suggesting some disorders improve with specific treatments like minoxidil and retinoids, while gentle hair care remains essential.

The document concludes that treatments like oral anti-androgens, minoxidil, and topical spironolactone can be effective for hair loss in men and women.

Topical spironolactone effectively treats hair loss in women.

This article reviews multiple books on topics including tissue augmentation and pigmentary system physiology, with no new clinical findings reported.

This article discusses the factors involved in optimizing laser hair removal, emphasizing patient selection, laser safety, and understanding laser–tissue interactions, but presents no new clinical findings.

This study found that in mice, dermal adipocytes initiate inflammation and aid repair after skin injury by releasing lipids, suggesting a role in managing inflammatory diseases and impaired wound healing.

This study found that light stimulation of intrinsically photosensitive retinal ganglion cells in the eyes can activate hair follicle stem cells through a neural circuit involving the sympathetic nervous system.

This study found that careful light microscopy using fluid-mounted hair improves detection of the pili annulati phenotype, which varies widely in expression and affects hair fragility.

Pili annulati is caused by a protein metabolism disorder affecting hair structure.

This study documents dominant transmission and complete penetrance of uncombable hair syndrome in a family, despite the father lacking visible abnormalities.

This report presents a case of pili torti in a young girl with citrullinemia, a novel association not previously documented.

This study found that the twisted hair shafts characteristic of pili torti may result from uneven outer root sheath cell development, leading to irregular hair shaft modeling and twisting.

This study found that 82.3% of girls with anorexia nervosa had pili torti, an acquired hair defect, suggesting a potential link to excess vitamin A intake.

This case study describes a 14-year-old girl with pili annulati who had fragile hair, which may be due to cavities within the hair shafts as seen in electron microscopic examinations.

This review discusses pili torti, a rare hair shaft disorder, and reports no new clinical results; it emphasizes the need to investigate underlying conditions in affected individuals.

This study reports two cases where pili anulati, typically a non-fragile hair condition, showed increased fragility due to androgenetic alopecia, causing hair shaft fracturing in the affected area.

This study observed unique ultrastructural changes in a 4-year-old girl with pili trianguli et canaliculi that may affect hair shaft surface characteristics due to inner root sheath alterations.

This case report describes an 18-year-old man with pili annulati, characterized by a "shagreened" appearance of the hair shaft with alternate bright and dark bands and wide holes throughout the cortex.

This case report describes the first documented occurrence of pili torti in a healthy young adult cat, marked by noninflammatory and nonpruritic symmetrical multifocal alopecia.

This case report describes two patients who experienced loose anagen hairs and pili torti, resulting in nonscarring alopecia, potentially linked to erlotinib treatment for solid tumors.

This study reported that 19 out of 29 examined individuals from a family spanning seven generations exhibited the distinctive symptoms of hypotrichosis congenita hereditaria Marie Unna type.

Frequent hairdryer use may worsen hair fragility in people with Pili Annulati.

This study found that the weak tensile strength of pili torti hair may result from loose keratin intermediate filaments due to abnormalities in disulfide bonds.

This abstract provides contact information for Dr. Ban Kamoona at the Medical University – Sofia and contains no research findings.

Hair shaft changes may be linked to CCCA, but their role is unclear.

In this report, researchers describe an unusual case of congenital pili multigemini, a hair follicle disorder, presenting on the eyebrow of a female infant, highlighting its rarity and atypical location.

This report describes a rare case of pili multigemini, where multiple hair shafts arise from a single follicle, discovered during an examination for folliculitis on a patient's abdomen.

Isolated patchy heterochromia with pili annulati can occur without other health issues.