Linear focal elastosis
Other names	Linear focal dermal elastosis, Elastotic striae
Specialty	Dermatology

Linear focal elastosis or elastotic striae is a skin condition that presents with asymptomatic, palpable or atrophic, yellow lines of the middle and lower back, thighs, arms and breasts.^[1]

Linear focal elastosis manifests as hypertrophic linear yellow to red plaques that are asymptomatic and typically discovered by accident in the absence of a traumatic past. Though it usually affects the lower and middle back symmetrically, it can also affect the legs or face.^[2]

Although the exact origin of linear focal elastosis is unknown, changes to elastic tissues are implicated.^[2]

According to histopathology, there may be more localized wavy fibers in the dermis, which are visible when elastic staining separates normal from hypertrophic collagen bundles.^[3] There may be fragmentation or aggregation of the elastic fibers in the deep and upper dermis.^[2] Fragmented elastic tissue, microfibrillar or granular constituents, and aggregated elastin are visible under an electron microscope.^[4]

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  Histopathology: Accumulation of fragmented elastotic material within the papillary dermis and transcutaneous elimination of elastotic fibers.^[5]

• Skin lesion

• Florell, Abigail J.; Wada, David A.; Hawkes, Jason E. (2017). "Linear focal elastosis associated with exercise" . JAAD Case Reports . 3 (1). Elsevier BV: 39– 41. doi : 10.1016/j.jdcr.2016.10.012 . ISSN 2352-5126 . PMC 5288297 .  
• Ramlogan, D.; Tan, BB; Garrido, M. (2001). "Linear focal elastosis". British Journal of Dermatology . 145 (1). Oxford University Press (OUP): 188– 190. doi : 10.1046/j.1365-2133.2001.04319.x . ISSN 0007-0963 . 

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