Background
Lichen striatus is a rare, benign, self-limited linear dermatosis of unknown origin that predominantly affects children. Lichen striatus is clinically diagnosed on the basis of its appearance and characteristic developmental pattern following the lines of Blaschko.
Pathophysiology
The skin is the primary organ system affected by lichen striatus. However, lichen striatus also may involve the nails.[1]
Epidemiology
Race
No racial predilection is recognized for lichen striatus.
Sex
No consensus exists on sex predilection in lichen striatus. Some studies show a 2- to 3-fold increased incidence in girls compared with boys, whereas others show an equal sex distribution.
Age
Lichen striatus is primarily a disease of young children. More than 50% of all lichen striatus cases occur in children aged 5-15 years. Other reports dispute this age range and claim that the median age of onset for lichen striatus is 3 years. Although lichen striatus is rare in both infants and adults, the disease can occur in persons of any age.[2, 3]
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Hofer T. Lichen striatus in adults or 'adult blaschkitis'?. There is no need for a new naming. Dermatology. 2003;207(1):89-92. [Medline].
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Arias-Santiago SA, Sierra Giron-Prieto M, Fernandez-Pugnarie MA, Naranjo-Sintes R. [Lichen striatus following Blaschko lines]. An Pediatr (Barc). Jul 2009;71(1):76-7. [Medline].
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Vukicevic J, Milobratovic D, Vesic S, Milosevic-Jovcic N, Ciric D, Medenica L. Unilateral multiple lichen striatus treated with tacrolimus ointment: a case report. Acta Dermatovenerol Alp Panonica Adriat. Mar 2009;18(1):35-8. [Medline].
Kavak A, Kutluay L. Nail involvement in lichen striatus. Pediatr Dermatol. Mar-Apr 2002;19(2):136-8. [Medline].
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Al-Niaimi FA, Cox NH. Unilateral lichen striatus with bilateral onychodystrophy. Eur J Dermatol. Jun 5 2009;[Medline].
Coto-Segura P, Costa-Romero M, Gonzalvo P, Mallo-García S, Curto-Iglesias JR, Santos-Juanes J. Lichen striatus in an adult following trauma with central nail plate involvement and its dermoscopy features. Int J Dermatol. Dec 2008;47(12):1324-5. [Medline].
Brennand S, Khan S, Chong AH. Lichen striatus in a pregnant woman. Australas J Dermatol. Aug 2005;46(3):184-6. [Medline].
Shepherd V, Lun K, Strutton G. Lichen striatus in an adult following trauma. Australas J Dermatol. Feb 2005;46(1):25-8. [Medline].
Patrizi A, Neri I, Fiorentini C, Chieregato C, Bonci A. Simultaneous occurrence of lichen striatus in siblings. Pediatr Dermatol. Jul-Aug 1997;14(4):293-5. [Medline].
Yaosaka M, Sawamura D, Iitoyo M, Shibaki A, Shimizu H. Lichen striatus affecting a mother and her son. J Am Acad Dermatol. Aug 2005;53(2):352-3. [Medline].
Ciconte A, Bekhor P. Lichen striatus following solarium exposure. Australas J Dermatol. May 2007;48(2):99-101. [Medline].
Hafner C, Landthaler M, Vogt T. Lichen striatus (blaschkitis) following varicella infection. J Eur Acad Dermatol Venereol. Nov 2006;20(10):1345-7. [Medline].
Keegan BR, Kamino H, Fangman W, Shin HT, Orlow SJ, Schaffer JV. "Pediatric blaschkitis": expanding the spectrum of childhood acquired Blaschko-linear dermatoses. Pediatr Dermatol. Nov-Dec 2007;24(6):621-7. [Medline].
Patrizi A, Neri I, Fiorentini C, Bonci A, Ricci G. Lichen striatus: clinical and laboratory features of 115 children. Pediatr Dermatol. May-Jun 2004;21(3):197-204. [Medline].
Taieb A, el Youbi A, Grosshans E, Maleville J. Lichen striatus: a Blaschko linear acquired inflammatory skin eruption. J Am Acad Dermatol. Oct 1991;25(4):637-42. [Medline].
Tilly JJ, Drolet BA, Esterly NB. Lichenoid eruptions in children. J Am Acad Dermatol. Oct 2004;51(4):606-24. [Medline].
Fujimoto N, Tajima S, Ishibashi A. Facial lichen striatus: successful treatment with tacrolimus ointment. Br J Dermatol. Mar 2003;148(3):587-90. [Medline].
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Campanati A, Brandozzi G, Giangiacomi M, Simonetti O, Marconi B, Offidani AM. Lichen striatus in adults and pimecrolimus: open, off-label clinical study. Int J Dermatol. Jul 2008;47(7):732-6. [Medline].
Tejera-Vaquerizo A, Ruiz-Molina I, Solis-Garcia E, Moreno-Gimenez JC. [Adult blaschkitis (lichen striatus) successfully treated with topical tacrolimus.]. Actas Dermosifiliogr. Sep 2009;100(7):631-2. [Medline].
Kim GW, Kim SH, Seo SH, Jung DS, Ko HC, Kim MB, et al. Lichen striatus with nail abnormality successfully treated with tacrolimus ointment. J Dermatol. Nov 2009;36(11):616-7. [Medline].

