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Lichen spinulosus is a rare skin disorder characterized by follicular keratotic papules that are grouped into large patches. [2] It is a variant of keratosis pilaris named for its resemblance to a patch of lichen .
Keratosis pilaris (KP; also follicular keratosis, lichen pilaris, or colloquially chicken skin. [ 1 ] ) is a common, autosomal - dominant , genetic condition of the skin's hair follicles characterized by the appearance of possibly itchy , small, gooseflesh -like bumps, with varying degrees of reddening or inflammation. [ 2 ]
Standard skin surface biopsy (SSSB) is a noninvasive method used for diagnosis. [ 1 ] Favre-Racouchot syndrome , eruptive vellus hair cysts , keratosis pilaris , and comedogenic acne are among the conditions that might be identified as differential diagnoses for facial trichostasis spinulosa.
[19] [20] Clinically, the diagnosis of any particular skin condition is made by gathering pertinent information regarding the presenting skin lesion(s), including the location (such as arms, head, legs), symptoms (pruritus, pain), duration (acute or chronic), arrangement (solitary, generalized, annular, linear), morphology (macules, papules ...
Visual diagnosis is made by the "stuck on" appearance, horny pearls or cysts embedded in the structure. Darkly pigmented lesions can be challenging to distinguish from nodular melanomas. [ 10 ] Furthermore, thin seborrheic keratoses on facial skin can be very difficult to differentiate from lentigo maligna even with dermatoscopy .
Scarring hair loss, also known as cicatricial alopecia, is the loss of hair which is accompanied with scarring.This is in contrast to non scarring hair loss.. It can be caused by a diverse group of rare disorders that destroy the hair follicle, replace it with scar tissue, and cause permanent hair loss.
The histopathology is unspecific and does not provide much support for the diagnosis. To rule out some differential diagnoses, though, which would require a different course of treatment, a biopsy is crucial. Subcorneal pustules, epidermal hypertrophy, or atrophy and erosions are seen in the histopathology. [4]
Pityriasis rubra pilaris refers to a group of chronic disorders characterized by reddish orange, scaling plaques and keratotic follicular papules. [2]: 442 Symptoms may include reddish-orange patches (Latin: rubra) on the skin, severe flaking (Latin: pityriasis), uncomfortable itching, thickening of the skin on the feet and hands, and thickened bumps around hair follicles (Latin: pilus for hair).