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'''Parasitic twin''' is a medical condition where one twin is not fully formed, and is dependent on the body of the other twin. This condition is a type of [[conjoined twins]], but unlike conjoined twins, one twin is less formed, or undeveloped, and is wholly dependent on the other twin. | {{SI}} | ||
{{Infobox medical condition | |||
| name = Parasitic twin | |||
| image = [[File:JohannSchenk-Twins.jpg|250px]] | |||
| caption = Illustration of a parasitic twin | |||
| field = [[Obstetrics]], [[Pediatrics]], [[Surgery]] | |||
| synonyms = Asymmetrical conjoined twins, heteropagus twins | |||
| symptoms = Presence of extra limbs or body parts | |||
| complications = [[Infection]], [[organ dysfunction]] | |||
| onset = [[Congenital disorder|Congenital]] | |||
| duration = Lifelong unless surgically treated | |||
| causes = Abnormal [[twinning]] process | |||
| risks = [[Pregnancy complications]], [[premature birth]] | |||
| diagnosis = [[Ultrasound]], [[MRI]], [[CT scan]] | |||
| differential = [[Teratoma]], [[conjoined twins]] | |||
| treatment = [[Surgical removal]] of parasitic tissue | |||
| prognosis = Generally good with treatment | |||
| frequency = Rare | |||
| deaths = Can be fatal if untreated | |||
}} | |||
'''Parasitic twin''' is a medical condition where one twin is not fully formed, and is dependent on the body of the other twin. This condition is a type of [[conjoined twins]], but unlike conjoined twins, one twin is less formed, or undeveloped, and is wholly dependent on the other twin. | |||
==Definition== | ==Definition== | ||
A '''parasitic twin''' is not a complete organism, but a part of a twin pair. The less developed twin is termed as the parasite, as it relies on the body functions of the complete twin, known as the autosite, to survive. The parasitic twin can be attached to any part of the autosite's body. | A '''parasitic twin''' is not a complete organism, but a part of a twin pair. The less developed twin is termed as the parasite, as it relies on the body functions of the complete twin, known as the autosite, to survive. The parasitic twin can be attached to any part of the autosite's body. | ||
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==Causes== | ==Causes== | ||
The exact cause of parasitic twinning is unknown. However, it is believed to occur when a twin embryo begins developing in utero, but the pair does not fully separate, and one embryo maintains dominant development at the expense of the other. | The exact cause of parasitic twinning is unknown. However, it is believed to occur when a twin embryo begins developing in utero, but the pair does not fully separate, and one embryo maintains dominant development at the expense of the other. | ||
==Diagnosis== | ==Diagnosis== | ||
Diagnosis of a parasitic twin is usually made through [[ultrasound]] during pregnancy. The ultrasound can reveal the presence of extra limbs or organs, which are not part of the normal development of the fetus. | Diagnosis of a parasitic twin is usually made through [[ultrasound]] during pregnancy. The ultrasound can reveal the presence of extra limbs or organs, which are not part of the normal development of the fetus. | ||
==Treatment== | ==Treatment== | ||
Treatment for parasitic twins involves surgery to remove the parasitic twin from the autosite. The complexity of the surgery depends on the point of attachment and the extent of shared organs and tissues. | Treatment for parasitic twins involves surgery to remove the parasitic twin from the autosite. The complexity of the surgery depends on the point of attachment and the extent of shared organs and tissues. | ||
==Prognosis== | ==Prognosis== | ||
The prognosis for the autosite after surgery is generally good. However, the prognosis for the parasitic twin is poor, as it is not a viable organism on its own. | The prognosis for the autosite after surgery is generally good. However, the prognosis for the parasitic twin is poor, as it is not a viable organism on its own. | ||
==See also== | ==See also== | ||
* [[Twin]] | * [[Twin]] | ||
* [[Conjoined twins]] | * [[Conjoined twins]] | ||
* [[Vanishing twin]] | * [[Vanishing twin]] | ||
[[Category:Medical conditions]] | [[Category:Medical conditions]] | ||
[[Category:Twins]] | [[Category:Twins]] | ||
{{stub}} | {{stub}} | ||
Latest revision as of 15:28, 8 April 2025
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Obesity, Sleep & Internal medicine
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| Parasitic twin | |
|---|---|
| |
| Synonyms | Asymmetrical conjoined twins, heteropagus twins |
| Pronounce | N/A |
| Specialty | N/A |
| Symptoms | Presence of extra limbs or body parts |
| Complications | Infection, organ dysfunction |
| Onset | Congenital |
| Duration | Lifelong unless surgically treated |
| Types | N/A |
| Causes | Abnormal twinning process |
| Risks | Pregnancy complications, premature birth |
| Diagnosis | Ultrasound, MRI, CT scan |
| Differential diagnosis | Teratoma, conjoined twins |
| Prevention | N/A |
| Treatment | Surgical removal of parasitic tissue |
| Medication | N/A |
| Prognosis | Generally good with treatment |
| Frequency | Rare |
| Deaths | Can be fatal if untreated |
Parasitic twin is a medical condition where one twin is not fully formed, and is dependent on the body of the other twin. This condition is a type of conjoined twins, but unlike conjoined twins, one twin is less formed, or undeveloped, and is wholly dependent on the other twin.
Definition[edit]
A parasitic twin is not a complete organism, but a part of a twin pair. The less developed twin is termed as the parasite, as it relies on the body functions of the complete twin, known as the autosite, to survive. The parasitic twin can be attached to any part of the autosite's body.
Causes[edit]
The exact cause of parasitic twinning is unknown. However, it is believed to occur when a twin embryo begins developing in utero, but the pair does not fully separate, and one embryo maintains dominant development at the expense of the other.
Diagnosis[edit]
Diagnosis of a parasitic twin is usually made through ultrasound during pregnancy. The ultrasound can reveal the presence of extra limbs or organs, which are not part of the normal development of the fetus.
Treatment[edit]
Treatment for parasitic twins involves surgery to remove the parasitic twin from the autosite. The complexity of the surgery depends on the point of attachment and the extent of shared organs and tissues.
Prognosis[edit]
The prognosis for the autosite after surgery is generally good. However, the prognosis for the parasitic twin is poor, as it is not a viable organism on its own.
