On June 24th of this year I gave birth to identical twin boys. (Mono/Di) They were 8 weeks premature and were born to Twin to twin syndrome with a large size difference. (1 lb 5 oz) We learned that our donor twin also was born with dextrocardia. HOWEVER- He only has dextrocardia. The rest of his organs are in the proper places. We were told we had mirror twins, however I am confused. How are they mirrored identical twins if only his heart is on the opposite side? Shouldn't he have situs inversus as well if they were real mirror image? They are no doubt about it identical twins. We had zygosity testing done, because I stubbornly refused to accept that they could be identical if only one had this problem. The specialist we took him too said that he'd only seen two other cases of dextrocardia before and never in twins so he couldn't answer our question. I'm very curious about this!
So I guess my question is, why does only one twin have dextrocardia? And if the answer is indeed "mirror twinning" why is it only dextrocardia and not dextrocardia with situs inversus? Thanks in advance!
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.