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Hair follicle nevus usually presents as a single, ... Pathology Outlines This page was last edited on 21 June 2024, at 01:24 (UTC). Text is ...
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.
Alopecia mucinosa, also known as Follicular mucinosis, Mucinosis follicularis, Pinkus' follicular mucinosis, and Pinkus' follicular mucinosis–benign primary form, is a skin disorder that generally presents, but not exclusively, as erythematous plaques or flat patches without hair primarily on the scalp, neck and face.
Histopathology is usually required to rule out any underlying nevus, but it typically reveals a normal epidermis with an increased number of morphologically normal hair follicles in the dermis. [ 5 ] Congenital hairy melanocytic nevus , congenital hypertichosis lanuginosa , plexiform neurofibroma , and generalized hypertrichosis are ...
The majority of epidermal inclusion cysts originate from the infundibular portion of the hair follicle, thus explaining the interchangeable, [14] yet inaccurate, use of these two terms. Epidermoid cyst may be classified as a sebaceous cyst , [ 15 ] although technically speaking it is not sebaceous. [ 16 ] "
Alternative diagnoses for CCRN consist of thyroglossal duct cyst, hair follicle naevus, fibroepithelial polyp, and branchial cleft cyst. [6] Thyroglossal duct cysts are typically found in the midline of the neck, near the hyoid bone, and move with tongue protrusion or swallowing. [7]
Giant pigmented nevus (bathing trunk nevus, congenital nevomelanocytic nevus, garment nevus, giant hairy nevus, nevus pigmentosus et pilosus) Halo nevus (leukoderma acquisitum centrifugum, perinevoid vitiligo, Sutton nevus) Hori's nevus (acquired bilateral nevus of Ota-like macules) Inherited patterned lentiginosis in black persons
The tumors, which are typically found in regions like the scalp with a high density of hair follicles, can be solid or solid cystic. Proliferating trichilemmal cyst frequently manifests clinically as a subcutaneous nodule that gradually grows into a big nodular mass. Rapid growth in some cases may be a sign of malignant development into cancer. [3]