The condition was first characterized in 1974,[6] but it is not yet known whether it is actually a distinct condition or merely a variant presentation of another syndrome. The presentation is similar to that of scleroderma or systemic sclerosis. However, unlike scleroderma, eosinophilic fasciitis affects the deeper fascial layers, rather than the dermis; the characteristic and severe effects of scleroderma and systemic sclerosis, such as Raynaud's syndrome, involvement of the extremities, prominent small blood vessels (telangiectasias), and visceral changes such as swallowing problems, are absent. Nevertheless, the term remains used for diagnostic purposes.[citation needed]
The key to diagnosis is the observation of skin changes in combination with eosinophilia, but the most accurate test is a biopsy of skin, fascia, and muscle.[citation needed]
Typical age of onset is around forty to fifty years, although cases in children have been observed. It remains unclear whether the condition is more common in women or men; patient numbers are small, and studies conflict in their reports of preponderance.[15]
^ abShulman, L. E (1975). "Diffuse fasciitis with eosinophilia: A new syndrome?". Transactions of the Association of American Physicians. 88: 70–86. PMID1224441.
^Pinal-Fernandez, I; Selva-O'Callaghan, A; Grau, J.M (2014). "Diagnosis and classification of eosinophilic fasciitis". Autoimmunity Reviews. 13 (4–5): 379–82. doi:10.1016/j.autrev.2014.01.019. PMID24424187.
^Antic M, Lautenschlager S, Itin PH (2006). "Eosinophilic fasciitis 30 years after - what do we really know? Report of 11 patients and review of the literature". Dermatology. 213 (2): 93–101. doi:10.1159/000093847. PMID16902285. S2CID29769383.
^Lakhanpal S, Ginsburg WW, Michet CJ, Doyle JA, Moore SB (1988). "Eosinophilic fasciitis: clinical spectrum and therapeutic response in 52 cases". Semin. Arthritis Rheum. 17 (4): 221–31. doi:10.1016/0049-0172(88)90008-X. PMID3232080.
Falanga, Vincent; Medsger, Thomas A. (1987). "Frequency, levels, and significance of blood eosinophilia in systemic sclerosis, localized scleroderma, and eosinophilic fasciitis". Journal of the American Academy of Dermatology. 17 (4): 648–656. doi:10.1016/S0190-9622(87)70251-5. ISSN0190-9622. PMID3668010.