Aborted thoracopagus.
D004200:Diseases in Twins; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D013724:Teratoma / Q000235:genetics*; D013899:Thoracic Neoplasms / Q000235:genetics*; D014428:Twins, Conjoined