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A trichilemmal cyst (or pilar cyst) is a common cyst that forms from a hair follicle, most often on the scalp, and is smooth, mobile, and filled with keratin, a protein component found in hair, nails, skin, and horns. Trichilemmal cysts are clinically and histologically distinct from trichilemmal horns, hard tissue that is much rarer and not ...
Proliferating trichilemmal cysts (also known as a pilar tumor, proliferating follicular cystic neoplasm, proliferating pilar tumor, and proliferating trichilemmal tumor) [1] is a cutaneous condition, characterized by proliferations of squamous cells forming scroll-like structures. [1] [2]: 678
English: Histopathology of a trichilemmal cyst, from internal (top) to external (bottom): - Solid eosinophilic-staining keratin. - Swollen pale keratinocytes, which increase in height closer to the interior. - Small, cuboidal, dark-staining basal epithelial cells in a palisade arrangement, with no distinct intercellular bridging. - Fibrous capsule.
Pilomatricoma is a benign skin tumor derived from the hair matrix. [2] [3] These neoplasms are relatively uncommon and typically occur on the scalp, face, and upper extremities.
Cock's peculiar tumour is a sebaceous cyst linked growth that can resemble a squamous cell carcinoma. [1] The name is given after a 19th-century English surgeon Edward Cock. [2] The proliferating cyst is usually solitary, but it often arises from a simple trichilemmal cysts in the hair follicle epithelium and these are multiple in 70% of cases ...
A sebaceous cyst is a term commonly used to refer to either: [1] Epidermoid cysts (also termed epidermal cysts, infundibular cyst) Pilar cysts (also termed trichelemmal cysts, isthmus-catagen cysts) Both of the above types of cysts contain keratin, not sebum, and neither originates from sebaceous glands.
Benign cyst kidney; radiological appearances mimic renal cancer, A cyst / s ɪ s t / is a closed sac, having a distinct envelope and division compared with the nearby tissue.Hence, it is a cluster of cells that have grouped together to form a sac (like the manner in which water molecules group together to form a bubble); however, the distinguishing aspect of a cyst is that the cells forming ...
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