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This review examines the androgen-dependent subtype of acquired progressive kinking of the hair and suggests it may be an early indicator of androgenetic alopecia, emphasizing the importance of distinguishing between subtypes for clinical decisions.

This study identified a new subtype of lichen planopilaris that mimics androgenetic alopecia, selectively affecting vellus hair follicles and presenting unique histopathological features.

In this study, researchers identified nine cases of hair follicular tumors among 100 dog biopsy samples in Kerala, India, detailing subtypes like trichoblastoma and pilomatricoma, and analyzed their clinical, gross, and microscopic pathology.

This review found that hair transplantation in patients with primary cicatricial alopecias is a viable option when the disease is stable, with outcomes varying significantly by subtype.

This study observed two distinct groups of alopecia areata lesions based on PD-1 expression in T cells from biopsied skin samples, suggesting potential differences in subtypes or stages of the disease that warrant further investigation.

In this study, the researchers identified a variant in the CCHCR1 gene associated with an alopecia areata subtype characterized by impaired keratinization and autoimmune events.

This case report presents a rare subtype of hypomyelinating leukodystrophy linked to a PYCR2 gene mutation, emphasizing exome sequencing's value in diagnosing undiagnosed childhood HLDs with atypical symptoms.

This report describes three cases of hair loss that appear consistent with cicatricial pattern hair loss, a possible new subtype of scarring alopecia presenting in a female pattern hair loss distribution.

This case report describes a 42-year-old Indian female with acute diffuse and total alopecia who experienced sudden diffuse hair loss within one day, differentiating it from telogen effluvium through specific dermoscopic findings.

The authors concluded that milia, steatocystoma multiplex, and eruptive vellus hair cysts may be subtypes of multiple pilosebaceous cysts with overlapping histologic features.

In this study on Iranian patients with non-scarring alopecia, researchers found that androgenetic alopecia was the most common subtype, with perifollicular inflammation observed more in males. They reported that transverse sectioning is generally sufficient for diagnosis, but combining with vertical sectioning provides more comprehensive information.

This study found no differences in trace element concentrations between Finnish alopecia patients and the normal population, but noted significant serum copper variation among different alopecia subtypes.

This study found that GLP-1 receptor agonists are linked to a 40% increased risk of non-scarring alopecia in adults, mainly due to weight loss-induced micronutrient deficiencies, with semaglutide and tirzepatide showing the highest hair loss signals.

This review discusses the five functional subtypes of telogen effluvium proposed by Headington and reports no new experimental findings.

This study found that in androgenetic alopecia patients, there is enhanced expression of type 2 TGF-β and type II receptors in hair follicles, suggesting a link to hair growth cycle changes.

This study suggests the existence of a new subtype of alopecia, called 'acute diffuse and total alopecia of the female scalp (ADTAFS)', characterized by acute, diffuse hair loss primarily in women and a rapid recovery.

This review discusses hair abnormalities in various epidermolysis bullosa subtypes and reports no new clinical findings.

This review discusses the classification of lichen planopilaris and its subtypes under the proposed term "lichenoid alopecias," suggesting they exist along a clinical and histological spectrum.

This study found that a thyroid hormone receptor ẞ subtype-selective thyromimetic was effective in promoting hair growth in mouse and monkey models when applied topically.

This review explores fibroblast heterogeneity in the mammalian dermis and suggests potential therapeutic applications by targeting fibroblast subtypes, but reports no new experimental results.

This review discusses the diagnostic criteria and treatment options for polycystic ovary syndrome focusing on metabolic subtypes and reports no clinical results.

This review discusses central centrifugal cicatricial alopecia, its similarities to lichen planopilaris, and emphasizes the need for further research due to its underdiagnosis and impact on African-descended women.

This study found that in mice, competition for hair follicles guides the organization of follicle-innervating LTMR neurons during early development, with different neuronal subtypes showing varying adaptive responses to increased neuron populations.

This study found that a non-scarring alopecia in C3H/HeJ mice resembles human alopecia areata and may serve as a valuable model for studying specific subtypes of the human condition.

This review discusses the classifications, diagnostic methods, and treatment strategies for female pattern hair loss, but reports no clinical results.

This study found that the multifunctional FEA-PCEI dressing significantly accelerated wound healing, reduced scar formation, and promoted hair follicle neogenesis while providing antibacterial and anti-inflammatory benefits.

This study found that the presence of premature desquamation of the inner root sheath in noninflamed hair follicles is a relatively specific marker for diagnosing central centrifugal cicatricial alopecia.

This article discusses various types of alopecia more common in African-American individuals and reports no clinical results; it highlights the importance of recognizing and differentiating these subtypes for diagnosis and treatment.

In this source, recent single-cell RNA-sequencing advances reveal significant transcriptional heterogeneity among skin fibroblasts, and the discussion focuses on the distinct subtypes' roles in skin homeostasis, repair, and their evolution in fibrotic diseases like keloid scars and cancer.

This article notes the lack of US prevalence data for primary lymphocytic cicatricial alopecias due to the recent introduction of subtype-specific ICD-10 codes and highlights the importance of early diagnosis for hair preservation.