Typo?

54,000 refs for "periosteal reaction":

Therefore, any differences in the pattern of **periosteal reaction** must arise in the ... If we see a solid pattern of periosteal reaction, we can be fairly ...
www.rad.washington.edu/mskbook/periostealreaction.html

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Note added at 40 mins (2006-04-04 00:59:48 GMT)
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12 refs for "periostic reaction," most of which appear to be non-native English:

The **periostic reaction** mainly attacks long bone diaphysis (femoris, humeri, etc) in a simetric pattern which can be confirmed by X-ray and bone scintigraphy ...
www.alasbimnjournal.cl/revistas/2/aborthopheadics7.htm

Tunisianorthoweb... painful. Radiography showed a dislocation of the right hip without any osseous lesion nor any **periostic reaction** (Fig.1). (fig 1). ...
www.tunisianorthoweb.com/comu2_eng.htm

JCR: Journal of Clinical Rheumatology - Fulltext: Volume 8(5 ...As for septic arthritis, the changes seen in MRI scans relate to femoral head structure abnormalities, which include erosions and **periostic reaction** with a ...
www.jclinrheum.com/pt/re/jcr/ fulltext.00124743-200210000-00019.htm

Elsevier SAS - [ Translate this page ]Multiple parosteal lipoma / Polyarthritis / Periostic reaction / Benign neoplasm bone / Magnetic resonance imaging. © 2006 - Elsevier SAS ...
france.elsevier.com/html/ index.cfm?act=abstract&cle=72273 -

Acute lymphoblastic leukeumia presenting as primary bone tumor ...We present a case of a 3,5 year-old-girl with ALL, who had a bone lesion at her left arm (osteolytic area with **periostic reaction**) as the first Clinical ...
www.paediatriki.gr/doit.asp?cmd=2&id=172&lan=EN

XXXVII Zjazd Radiologów Polskich 2004 **PERIOSTIC REACTION** IN MALIGNANT BONE TUMOURS. H. Brągoszewska, I. Kopyś-Wiszniewska, K. Wermeński Zakład Diagnostyki Obrazowej, Instytut Matki i Dziecka, ...
www.amb.edu.pl/konferencje/ radiologia/szczegol_sesja_plakat.htm