Lichen planopilarisL66.1

Kaposi 1895

Controversial term for a chronic, primarily lymphocytic folliculitis leading to gradual, complete follicular atrophy and alopecia. The term is used synonymously with lichen ruber follicularis by most authors. It is dispensable as far as it goes.

The clinical picture described here as lichen planopilaris characterizes this as atrophying follicular keratinization disorder (keratosis pilaris), which can be subsumed either under "keratosis pilaris decalvans (syn: keratosis follicularis spinulosa decalvans) or under postmenopausal frontal fibrosing alopecia (Gálvez-Canseco A et al 2018).

Unknown.

Occurring in middle age. f:m = 8:2.

Localized at the capillitium, especially in the parietal and frontal region. Rarely occipital involvement.

Diffusely distributed over a smaller or also larger area, pinhead-sized, follicular, pale to strong red colored, ruff-like erythema arranged around the hair follicle, giving way in the course of months to 0.05 - 0.1 cm large, reddened papules with pointed hyperkeratosis/follicular hyperkeratosis ("pilar casts") with or without central hair.

Older "burned out" areas show atrophic scarring, smooth mirroring (scarring) alopecia without erythema or follicular structures(pseudopelade).

In some of the patients, there is simultaneous evidence of a still present or already burned out keratosis follicularis (atrophicans) on the extensor sides of the upper arms or thighs and/or a ulerythema ophryogenes.

Interface dermatitis with lymphocytic infiltration of the infundibulum and the isthmus of the follicle

Lichen ruber follicularis

Experimental approaches in smaller studies:

• Application of oral tetracyclines.
• Moderately good clinical results have been described with the use of hydroxychloroquine and oral retinoids.
• There are reports of systemic use of low dose methotrexate or cyclosporine A.

The term "lichen planopilaris" is used inconsistently. In the Anglo-American language it is used synonymously with"lichen planus follicularis". This classification would provide nomenclatural clarity. In principle, we agree with this opinion. We use the term lichen planopilaris only to reflect its resonance in international literature.

Patient Request:

About a year ago, I gradually lost my eyebrow hair. I suspected a hormonal change due to age (62 years). Now about half a year ago I noticed a strong thinning of the head hair, especially Geheimratsecken and above the ears. The dermatologist took a scalp sample. Findings: Lichen plano pilaris. Now, based on his recommendation, I treat the scalp three times a week with Dermovate scalp application solution. I read on the net that there is hardly any cure for this disease. What else can you advise me? Should I expect total hair loss? I quit my part-time job on the advice of my doctor to eliminate the job stress situation(night watch). Are there any other causes of this disease? Are there any other known symptoms? I am plagued by episodic pain on the side of the instep of the inner foot, above the big toe, especially often at night or when I am resting - they are very unpleasant and strong stabs that do not occur when I am moving. Is there possibly a connection? I have also thought about fibromyalgia? Thank you very much for your answer.

Comment (Prof. Altmeyer): Classic description of a keratosis pilaris syndrome.

Answer from Prof. Dr. med. Stephan Lautenschlager:

Your description of the hair loss fits well to the diagnosis of "Lichen planopilaris". This disease, the cause of which has not yet been clarified, is fortunately harmless and cannot be held responsible for your pain. Unfortunately, however, it can lead to scars in hairy areas, which is why the loss of hair is sometimes irreversible. A therapeutic goal in your case must therefore be to stop the inflammatory process to avoid further deterioration, this can be well tried with Dermovate. If there is no effect, tablets (retinoids, antimalarials or prednisone) can be used.

Lit: article taken on 18.02.9.30 from seniorweb: https://seniorweb.ch/2013/12/31/hair-loss-and-lichen-planopilaris/

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2. Chieregato C et al (2003) Lichen planopilaris: report of 30 cases and review of the literature. Int J Dermatol 42: 342-345.
3. Gálvez-Canseco A et al (2018) Lichen planopilaris and frontal fibrosing alopecia cannot be differentiated by histopathology. J Cutan Pathol doi: 10.1111/cup.13112.
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