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This study reports a rare case of a 40-year-old woman with multiple calcified trichilemmal cysts, associated with alopecia universalis and suggesting a potential genetic link.

This study found that complete surgical resection and multidisciplinary management were crucial for treating proliferating trichilemmal tumors, though malignant cases showed recurrence and mortality risks.

This article explains that proliferating trichilemmal tumors, originating in the hair follicle, can exhibit low-grade malignant potential, and recommends wide excision to minimize recurrence risk, but reports no new clinical findings.

This case report describes a proliferating trichilemmal cyst that underwent malignant transformation, with specific keratins identified in the tumor but no epidermal keratin detected.

This case report describes the occurrence of a very rare disease, MTPC, in the elbow of a man who does not match the typical etiology, highlighting its academic significance.

This case report describes a middle-aged man with a growing scrotal mass, diagnosed as a benign proliferating trichilemmal tumor, which can mimic squamous cell carcinoma, highlighting the importance of correct diagnosis.

This case study reports a near-complete response of a proliferating trichilemmal tumor to neoadjuvant radiotherapy in a 79-year-old woman, highlighting radiotherapy's role in managing this condition when patients are unsuitable for surgery.

This report describes an unusual case of proliferating trichilemmal cyst with trichoepitheliomatous change in a young woman, differing from its typical presentation in elderly women.

This case report describes a 32-year-old man who developed SCC of the common bile duct a year after receiving treatment for a malignant proliferating trichilemmal tumour on the scalp.

This study suggests that immunostaining for Keratin 15 may be a useful tool for differentiating between basal cell carcinoma and trichoepithelioma.

This study suggests that pilomatricoma can differentiate towards various hair follicle structures, including hair matrix, hair cortex, follicular infundibulum, outer root sheath, and hair bulge.

This study found that immunohistochemistry for calretinin may identify certain cutaneous adnexal tumors with follicular differentiation towards cells of the outer root sheath.

This classification proposal introduces a novel system for categorizing cutaneous adnexal cysts based on their origin in the folliculosebaceous unit and sweat glands, aiming to simplify and enhance understanding of these skin lesions.

In this study, the staining properties of two types of cysts, epidermal and pilar, were found to differ, supporting their origins from the epidermis and the trichilemmal hair follicle layer, respectively.

This study found that TGF-β1 expression in follicular tumors correlates with differentiation degree and suggests its potential role alongside p63 in differentiating between sebaceous and follicular tumors.

This case report details the first pediatric occurrence of naevus trichilemmocysticus, a newly defined type of organoid naevus.

This study used electron microscopy to characterize tissues on telogen hair roots, finding that tissue quality, including nucleated and nonnucleated epithelial cells, may play a crucial role in DNA typing for forensic analysis.

This study examined the expression patterns of various cytokeratins in the outer root sheath of human anagen hair follicles, noting distinct differentiation patterns and localization of keratin markers.

This study identified a high-risk allele in the PLCD1 gene associated with hereditary trichilemmal cyst formation, proposing a monoallelic two-hit mechanism as the underlying genetic pathogenesis.

This case report describes an 89-year-old woman with a recurrent benign proliferating trichilemmal tumor on her back, highlighting its misdiagnosis as a sebaceous cyst and successful excision with free margins.

The authors concluded that thymoma-associated paraneoplastic syndrome in cats may manifest as noninflammatory alopecia instead of exfoliative dermatitis, and should be considered when diagnosing multifocal noninflammatory alopecia.

This case study describes a rare cutaneous follicular hybrid cyst intimately associated with syringocystadenoma papilliferum, proposing a potential relationship with the infrainfundibulum based on keratin expression.

This review discusses various scalp infections, infestations, and neoplasms but reports no new clinical findings; the authors emphasize the diversity of diseases from different origins.

This study suggests that immunohistochemistry of keratin and involucrin expression can aid in distinguishing malignant trichilemmoma from other tumors previously diagnosed as such.

In this study, researchers found that mosaic PLCD1 hotspot variants, even without the recognized germline "risk allele," may be a rare but significant genetic cause of nevus trichilemmocysticus, warranting DNA testing and sensitive sequencing technologies for accurate diagnosis.

This case report describes an unusual nail tumor termed "onycholemmal horn" in a 77-year-old woman, highlighting its distinct histopathological features and the importance of excisional biopsy for accurate diagnosis.

This article describes pilar cysts, common dermal cysts often seen in young women, which typically require surgical removal.

This case study found that a skin lesion in a Samoyed dog did not match any single known follicular cyst or neoplasm type described in the literature.

This review discusses the controversial non-inflammatory alopecia known as alopecia X, highlighting its unknown etiology and the variable effectiveness of various proposed treatments, but reports no new results.

This report presents the first known case of a proliferating hybrid cyst containing both epidermoid and trichilemmal components on the scrotum of a 44-year-old man.