1. Conjoined Twins (Monozygotic, Monochorionic)
Failure of Embryonic Division after Day 13
๐ Single Chorion and Single Amniotic Sac
๐ Inseparable Fetal Bodies on Real-Time Scan
๐ Constant Relative Fetal Positions
๐ Inability to Separate Fetal Skin Contours
2. TYPE CLASSIFICATION (BY SITE OF FUSION)
๐ Thoracopagus (Chest Fusion)
๐ Omphalopagus (Abdominal Fusion)
๐ Thoraco-Omphalopagus
๐ Craniopagus (Head Fusion)
๐ Ischiopagus (Pelvic Fusion)
๐ Pygopagus (Sacral Fusion)
๐ Parapagus (Side-by-Side Fusion)
3. CARDIAC & VASCULAR ASSESSMENT
๐ Shared Heart (Single or Fused Cardiac Chambers)
๐ Separate Hearts with Vascular Connections
๐ Complex Congenital Heart Disease
๐ Shared Great Vessels
4. CNS & CRANIOFACIAL FINDINGS
๐ Shared Brain Structures
๐ Fused Skull with Separate or Common Brains
๐ Facial Duplication or Fusion
5. ABDOMINAL & THORACIC ORGAN SHARING
๐ Shared Liver (Most Common)
๐ Shared Gastrointestinal Tract
๐ Shared Diaphragm
๐ Shared Genitourinary Structures
6. LIMB & SKELETAL FINDINGS
๐ Normal Number of Limbs
๐ Limb Fusion or Duplication
๐ Abnormal Vertebral Alignment
7. AMNIOTIC & PLACENTAL FINDINGS
๐ Single Placenta
๐ Polyhydramnios
๐ Cord Anomalies (Single or Fused Umbilical Cord)
8. PROGNOSTIC & COUNSELING INDICATORS
๐ Extent of Vital Organ Sharing
๐ Surgical Separability Assessment
๐ Associated Structural Anomalies
๐ Overall Survival Prognosis
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