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This article reviews the principles of donor and recipient dominance in hair transplantation and reports no new experimental results.

This article discusses ovarian steroid cell tumors, which can produce testosterone and manifest symptoms like hirsutism, emphasizing surgery as the primary treatment, but reports no new clinical findings.

In this study, researchers found that replacing natural aggregates with animal bones and human hair with increased microroughness may improve the mechanical strength and durability of concrete.

This case study reports a peculiar variant of an epidermal cyst in a patient, featuring unique characteristics like brownish, lumpy contents resembling bone marrow.

This study found that incorporating pig-hair fibers and green mussel shells in concrete increased compressive strength but decreased workability, suggesting potential use in structures not requiring strength above 28 MPa.

This article reports a rare case of squamous cell carcinoma with miliary calcification in a cutaneous horn, suggesting possible involvement of calcium-binding proteins in this unique presentation.

This study found that epithelial components of calcifying epithelioma of Malherbe showed lectin binding and keratin staining patterns similar to normal hair follicles, with prominent Con A staining in tumor giant cells.

This study evaluated a microemulsion-based flushing fluid made with castor oil that effectively removed 84.85% of mud cake formed by drilling fluid, highlighting its Newtonian fluid behavior and high wettability inversion capability.

This study found that experimentally induced calcification in rat skin led to rapid and localized mineralization in hair follicles, progressing to more extensive calcification with prior hypercalcemic treatment.

This study found that hair follicle tissue effectively induced mineral formation in calcium phosphate solutions, likely due to its nucleating ability, which was lost when the tissue was lyophilized and stored.

This study investigates calcium and phosphorus accumulations in the hair of mummies from the Taklamakan desert and debates their exogenous or endogenous origin.

This study identified the distribution of keratin-associated proteins during cornification in the epidermis of reptiles, revealing unique structural characteristics in sauropsid keratin proteins compared to other vertebrates.

This study provides conclusive evidence of exogenous calcium fatty acid deposits forming between the cuticle layers in hair, affecting its optical and mechanical properties.

This study found that the extraction-resistant structures in hair, feathers, and hagfish teeth are due to ε-(γ-glutamyl)lysine cross-linked proteins, emphasizing their role in maintaining the integrity of these materials.

This study found that modifying biphasic calcium phosphate/poly(methyl methacrylate) bone cement with human hair keratin improves its hydrophilicity, mechanical properties, and supports bone repair in rats, indicating potential for orthopedic applications.

In this case study, a 51-year-old Japanese man was diagnosed with desmoplastic trichoepithelioma after histological examination of surgically excised facial plaques.

This review discusses five potential mechanisms for kidney stone formation, including urinary supersaturation, Randall's plaques, sex hormones, the microbiome, and immune responses, and reports no new results.

In this study, researchers developed a method using stencils to create controlled stiffness gradients in alginate hydrogels, revealing that stiffer regions within the gels promote deeper invasion by breast cancer cells, facilitating the study of mechanosensitive cellular behaviors.

This report describes a rare case of tumoral calcinosis presenting as a slow-growing mass on the scalp in an Afro-Caribbean man, with histopathology revealing calcium deposits and associated tissue changes.

This study concludes that tiny infundibular cysts, rather than comedones, are the primary lesions in chloracne.

This study shows that microdiffraction experiments reveal structural layers in keratinous tissues, each with different keratin types, potentially explaining their dual role as mechanical support and chemical barriers.

This study reports that the newly developed SA-Ca(II) hydrogel has tunable mechanical properties, high biocompatibility, and potential applications in wearable protections and stimuli-responsive electronics.

This article discusses recent findings on piedra infections in hair and their keratinolytic activities, but reports no new clinical results.

This study proposed a hypothesis for cutaneous calcinosis, suggesting that feeding DHT and subsequent epilation lead to ATP release and calcium orthophosphate formation, initiating calcification in rats.

This study found that small proline-rich proteins modify the biomechanical properties of cornified cell envelopes in rodent forestomachs, potentially affecting the tissue's ability to withstand mechanical stress.

This article discusses methods to measure comedogenesis in acne through the presence of microcomedones and reports no new clinical results; the authors outline a skin surface biopsy technique using cyanoacrylate gel.

Vertebrate skin evolved to be more specialized and complex, especially in land animals.

This study found that mesenchymal progenitor cells from human hair roots seeded onto polymer scaffolds stimulated the production of mineralized proteins, enhancing bone-like structures, with optimal results at a pore size of 35 µm.

This study identified two types of calcium in human scalp hair shafts: easily removable calcium, likely as calcium soaps, and more stably bound calcium, possibly related to Ca-binding proteins.

This study found that applying Laponite clay gels to skin wounds in mice did not speed up wound closure but significantly improved healing quality compared to phosphate-buffered saline or alginate treatments, with benefits such as enhanced re-epithelialization and hair follicle stimulation near wounds.