T sign (obstetrics)

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.

Ultrasound - obstetric
Inspired signs

Article information

rID: 2142
System: Obstetrics
Section: Signs
Tag: cases
Synonyms or Alternate Spellings:
  • T sign in twin pregnancy

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.