What characteristics define lichen planus that resemble keratosis under dermoscopy?

What characteristics define lichen planus that resemble keratosis under dermoscopy?

The manifestation of keratosis resembling lichen planus in its later stages is typically defined by the presence of scattered clusters of pigmentation, accompanied by a diffuse scattering of gray dots or granules that collectively create a pattern resembling a granular dispersal. Additionally, the borders often exhibit a scalloped or irregular, moth-eaten-like appearance.

Identifying Whether Melasma is Dermal or Epidermal: A Guide

The epidermal form of melasma exhibits a prominent dark brown hue, accompanied by a distinctively outlined border. Under ultraviolet illumination, it becomes even more evident, and frequently demonstrates favorable responsiveness to therapeutic interventions. Conversely, dermal melasma manifests with a lighter brown or bluish tint, characterized by an indistinct border. Its appearance remains unaltered under black light exposure, and it tends to be less responsive to treatment efforts.

What are the three classifications of melasma?

The classification of melasma can be categorized into epidermal, dermal, and a combination of both, based on the varying degrees of melanin augmentation within the skin layers.

What constitutes the characteristic symptoms associated with lichen planus pigmentosus in a clinical setting?

Indications
Shiny, purple, flat lesions frequently appearing on the inside of the forearms, wrists, or ankles.
Rash streaks developing where the skin has undergone scratching.
White, lace-like spots on the tongue or cheek linings.
Irritation causing itching.
Painful ulcers in the mouth or genital regions.
In rare instances, alopecia.
Scarring or absence of nails.
Additional symptoms...•

How do lichen planus pigmentosus and EDP differ from one another?

Lichen Planus Pigmentosus (Abbreviated as LPP)

Distinct from EDP, LPP lacks any lesions characterized by red borders. Despite the lack of a definitive cause for LPP, ultraviolet radiation has been suggested as a potential factor, considering the positioning of the spots. In certain research endeavors, mustard oil and amla oil have been noted as potential contributing factors.melasma dermoscopy

Does melasma typically display a symmetrical pattern?

The appearance of melasma tends to be symmetrical, often manifesting on both sides of the face. Despite its potential to emerge in any region of the body, it predominantly appears on the cheeks, the upper lip, and the lateral facial contours. Notably, it tends to darken under exposure to sunlight, heat, inflammation, and hormonal imbalances.

Can you elaborate on the distinction between melasma and nevus?

Melasma, commonly associated with pregnancy, is also referred to as "pregnancy mask." It generally manifests on both facial sides, exhibiting a brownish hue rather than a bluish one. Blue nevus, on the other hand, is a blue-hued mole that can emerge anywhere on the skin and remains unaffected by age.

Where can lichen planus pigmentosus be found?

Lichen planus typically impacts the skin regions near the wrists and elbows (the flexural areas), the hand's posterior aspects (dorsal areas), and the anterior portions of the lower legs. Roughly 50% of individuals diagnosed with lichen planus experience oral manifestations, which involve the mucous membranes of the mouth and the tongue.negative network dermoscopy

How does a mild form of melasma appear visually?

Upon the emergence of melasma, it tends to manifest as pigmented patches ranging in hues from tan to brown, grayish brown, or even bluish gray, resembling freckles. These occurrences are predominantly observed on specific facial regions, such as the cheeks, forehead, chin, and occasionally above the upper lip. While less prevalent, melasma can also manifest on the arms, neck, or other body parts.

What lies at the heart of the origination of melasma?

Facial melasma can manifest due to an array of predisposing factors, ranging from solar radiation exposure to the use of tanning facilities, as well as hormonal fluctuations and hereditary predispositions. The primary underlying mechanism leading to the onset of melasma is the excessive synthesis of melanin by melanocytes, ultimately giving rise to hyperpigmentation.