String sign (bones)
Last revised by Matt A. Morgan ◉ on 19 Jan 2021
Citation, DOI, disclosures and article data
Citation:
Amini B, Morgan M, Gaillard F, et al. String sign (bones). Reference article, Radiopaedia.org (Accessed on 01 Apr 2023) https://radiopaedia.org/articles/2098?iframe=true
DOI:
-
rID:
2098
Article created:
2 May 2008, Behrang Amini
Disclosures:
At the time the article was created Behrang Amini had no recorded disclosures.
View Behrang Amini's current disclosuresLast revised:
19 Jan 2021, Matt A. Morgan ◉
Disclosures:
At the time the article was last revised Matt A. Morgan had no recorded disclosures.
View Matt A. Morgan's current disclosuresRevisions:
11 times, by 6 contributors - see full revision history and disclosures
Systems:
Sections:
Synonyms:
- String sign of parosteal osteosarcomas
The string sign of parosteal osteosarcoma refers to the plain radiographic/CT appearance of a radiolucent cleavage plane between portions of the tumor and cortex of the affected bone. The tumor stalk becomes more broad-based with time, obliterating the string sign in later stages.
The string sign can also be seen in myositis ossificans.
References
- 1. Lindell MM Jr, Shirkhoda A, Raymond AK, Murray JA, Harle TS. Parosteal osteosarcoma: radiologic-pathologic correlation with emphasis on CT. AJR Am J Roentgenol. 1987;148(2):323-8. PubMed
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skeletal metastases
- morphology
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