Parasitic twins are additionally referred to as asymmetrical or unequal conjoined twins. They're stated to be a sort of conjoined twins since it's the identical course of that produces vanishing twins in addition to conjoined twins. It happens in one per a million births.
Parasitic twins are an identical twins, which means a single egg cell will get fertilized and splits in two after fertilization, thereby leading to two separate fetuses. No matter this, if an egg fails to detach from the opposite utterly, it may end up in conjoined twins.
In some circumstances, one of many fetuses begins absorbing the opposite throughout the embryonic developmental stage. The fetus that will get partially absorbed by the opposite stops growing and therefore turns into parasitic whereas the opposite retains growing and turns into the dominant twin.
Therefore, it's stated that parasitic twins happen when a twin embryo begins growing within the utero however the pair doesn't totally separate and one embryo maintains a dominant growth on the expense of it is twin.
There are numerous opinions, theories and postulations relating to the formation of parasitic twins however what precisely results in it can't be said.
The dual that's undeveloped is termed parasitic as it's completely depending on the physique features of the entire fetus. The impartial or full fetus is known as the autositic twin.
The parasitic twin seems within the type of tissues or limbs on the autositic twin. It's both the partially developed twin attaches itself to the totally developed twin or one small physique half will get duplicated. Virtually, they're bodily composed of a single correctly functioning fetus who carries additional organs.
They're named based mostly on the positioning of attachment of the organs to the autositic twin
– Epigastric : At or above the higher stomach
– Omphalopagus : On the stomach
– Craniopagus parasiticus : On the cranium/skull
– Rachipagus : On the again
– Pygomelia : Additional limbs hooked up on the buttocks and should then resemble a false tail
And so on
In contrast to conjoined twins, they don't share organs. A pedicle of soppy tosses containing giant blood vessels connects the parasitic twin to the opposite twin.
Surgical removing of the undeveloped twin is one of the simplest ways to avoid wasting the autositic twin from the ache and burden of the opposite. It is usually one of the simplest ways to avoid wasting the lifetime of the autositic twin as carrying the undeveloped twin could cause enormous medical problems.
Generally after surgical procedure, little problems might come up within the physique of the autositic twin which is why follow-up surgical procedures are suggested.
Sources : Wikipedia, Flo.well being