T sign (obstetrics)
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Citation:
Gaillard, F., Hacking, C. T sign (obstetrics). Reference article, Radiopaedia.org. (accessed on 17 Aug 2022) https://doi.org/10.53347/rID-2142
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2142
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- T sign in twin pregnancy
The "T sign" is really the absence of a twin-peak sign (or lambda (λ) sign) and is used in ultrasound assessment of a multifetal pregnancy.
It refers to the lack of chorion extending between the layers of the intertwin membrane, denoting a monochorionic pregnancy. The intertwin membrane comes to an abrupt halt at the edge in a T configuration.
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References
- 1. Weissleder R, Wittenberg J, Harisinghani MM et-al. Primer of Diagnostic Imaging, Expert Consult- Online and Print. Mosby. (2011) ISBN:0323065384. Read it at Google Books - Find it at Amazon
- 2. Nyberg DA, McGahan JP, Pretorius DH. Diagnostic imaging of fetal anomalies. Lippincott Williams & Wilkins. (2003) ISBN:0781732115. Read it at Google Books - Find it at Amazon
- 3. Trop I. The twin peak sign. Radiology. 2001;220 (1): 68-9. Radiology (full text) - Pubmed citation
- 4. Merz E, Bahlmann F. Ultrasound in obstetrics and gynecology. Thieme Medical Publishers. (2005) ISBN:1588901475. Read it at Google Books - Find it at Amazon
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