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This review discusses the current knowledge on using special and immunohistochemical stains for diagnosing hair disorders, concluding that no stains are recommended for routine use in hair pathology.

Woman has discoid lupus, frontal fibrosing, and androgenetic alopecia.

This study aimed to document and compare the prevalence and characteristics of hair loss in patients with systemic lupus erythematosus, noting the differences in trichoscopic and histopathologic evaluations between those with and without alopecia. Results are not reported.

A woman with Parry-Romberg syndrome developed new curly hair on one side of her scalp, a condition not previously linked to the syndrome.

This study demonstrated that stress inhibited hair growth in mice, likely through substance P-dependent activation of immune cells, highlighting a brain-hair follicle connection.

This study observed that simvastatin promoted hair regrowth in a mouse model of alopecia areata by reducing inflammatory markers and T cell proliferation, partly through disruption of isoprenoid metabolite production.

This study observed that extracts of Biotae Orientalis showed hair growth effects in mice and suggest they may be useful for topical treatment of alopecia areata.

This letter argues that cicatricial pattern hair loss likely represents end-stage androgenetic alopecia and not a variant of lichen planopilaris, as previously suggested.

The document concludes that inflammation markers can be used in diabetes, vitamin D3 affects immune pathways, hyperthyroidism changes hormone levels, androgen levels help diagnose Adrenocortical Carcinoma, erectile dysfunction is linked to diabetes, hypogonadism is common in HIV-infected males, and hormones can be biomarkers for various conditions.

This study observed that patients with isolated neutropenia exhibit significant differences in certain lymphocyte and monocyte subtypes compared to healthy controls, including higher neutrophil/lymphocyte MFI ratios and lower percentages of natural killer cells.

This study found that thalidomide increased peripheral lymphocyte counts and reduced inflammation in lupus erythematosus patients, but was associated with polyneuropathy, suggesting careful use in refractory cases.

In this study, researchers observed distinct aging signatures in mouse keratinocytes, with increased expression in older mice, and noted relevant pathway changes that were also evident in human skin, suggesting potential insights into intrinsic skin aging.

This case report highlights a rare instance of CD8-positive hypopigmented mycosis fungoides causing alopecia areata-like changes, emphasizing the necessity of scalp biopsy in such presentations.

In this study, the authors observed that controlled microflora in gnotobionts leads to delayed maturation of T-dependent lymphocytes in the thymus, affecting cellular immunity reactions.

This study found that in laboratory rats, toxic concentrations of hydrogen sulfide affected the immune system differently depending on age and immune suppression status, with notable changes in immune cell levels and phagocytosis, suggesting significant roles in age-associated pathologies.

This study found that SLE patients with hair loss exhibited significant differences in the size and number of sebaceous glands compared to those without hair loss, but showed no histopathological differences between affected and unaffected scalp areas.

This study found that inhaled fluticasone for 11 months did not adversely affect the immune function or response to vaccination in horses with heaves.

This study reports the first documented case of Cronkhite-Canada syndrome in a patient with myelodysplastic syndrome, where corticosteroids dramatically improved the patient's condition.

In this study, hyperplastic layers of scabietic sheep skin showed expansive keratin labeling, indicating altered keratin expression compared to healthy skin.

This study identified a single autosomal recessive gene responsible for hypotrichosis in a mutant rabbit strain, affecting hair growth and causing epidermal and hair follicle abnormalities.

This study identified multiple loss of function variants in the HR gene linked to the unique hair coat phenotype in lykoi cats, also known as werewolf cats.

This article discusses various types of primary cicatricial alopecias and reports no new clinical results; it emphasizes the importance of accurate diagnosis for effective management.

This study found that wavy sinus hairs in cats were significantly associated with feline leukemia virus infection, suggesting this physical trait might be useful for identifying infected cats.

This case report describes a patient with an allergic sensitization to minoxidil, indicating that such patients should pursue alternative therapies to treat androgenetic alopecia.

This study found that mechlorethamine restored hair growth in mice with alopecia-areata-like disease by eliminating infiltrated lymphocytes and inhibiting certain pro-inflammatory cytokines in treated skin areas.

This study observed that patients with alopecia areata often have a T-cell receptor repertoire in skin lesions that suggests a specific antigen-driven immune response may be important in the disease's pathogenesis.

In this experimental study, laser irradiation significantly altered the gene expression of cytokines in cultured human T-cell lymphocytes, suggesting that such laser light may photobiomodulate cytokine production in vitro.

This study observed that patients receiving IL-2 immunotherapy developed a skin eruption characterized by burning and pruritus, which resolved shortly after stopping the infusion, suggesting that IL-2 mediated these effects.

Other common signs, not just the well-known immune cells around hair bulbs, are important for diagnosing hair loss from alopecia areata.

This study found that finasteride caused adverse effects on liver, kidney, and heart tissues in female mice, raising concerns about its potential use in females for treating androgenetic alopecia.