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Relative incidence of cutaneous cysts: Trichilemmal cyst is labeled near top. 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 .
Scalp folliculitis is a skin condition that occurs when the hair follicles on the scalp become inflamed. This results in pustules, whiteheads, or other pimple-like bumps on the scalp that can be ...
The condition is identified by excessive thickening of the soft tissues of the scalp and characterized by ridges and furrows, which give the scalp a cerebriform appearance. Clinically, the ridges are hard and cannot be flattened on applying pressure. Patients show visible folds, ridges or creases on the surface of the top of the scalp. [2]
The occipital lymph nodes, one to three in number, are located on the back of the head close to the margin of the trapezius and resting on the insertion of the semispinalis capitis. Their afferent vessels drain the occipital region of the scalp , while their efferents pass to the superior deep cervical glands .
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)
Pachycephalosaurus (/ ˌ p æ k ɪ ˌ s ɛ f əl ə ˈ s ɔː r ə s /; [2] meaning "thick-headed lizard", from Greek pachys-/ παχύς-"thickness", kephalon/ κεφαλή "head" and sauros/ σαῦρος "lizard") [3] is a genus of pachycephalosaurid ornithischian dinosaur.
An occipital bun, also called an occipital spur, occipital knob, chignon hook or inion hook, is a prominent bulge or projection of the occipital bone at the back of the skull.
Hard lump with a scaly top or ulceration. [1] Risk factors: Ultraviolet radiation, actinic keratosis, tobacco smoking, lighter skin, arsenic exposure, radiotherapy, poor immune system function, HPV infection [2] Diagnostic method: Tissue biopsy [2] [3] Differential diagnosis: Keratoacanthoma, actinic keratosis, melanoma, warts, basal cell ...