EDITORIAL COMMENT: We accepted this case for publication because, as the authors indicate, fetus papyraceous is a complication seen in multiple and not singleton pregnancy. Apart from its anecdotal interest, the case supports the view that pressure on a dead second trimester fetus is the important aetiology information of a fetus papyraceous. If the condition occurred only when one twin died in the second trimester, with the pregnancy continuing with the surviving twin (the usual circumstance), then the hormonal production by the living placental tissue could be a factor in the state of preservation of the dead fetus. This occurs with both uniovular and binovular twins. Our editorial committee and reviewer know of no case of fetus papyraceous situated in the uterus in a singleton pregnancy. A lithopaedion can occur in a singleton abdominal pregnancy and presumably has a different pathology to that of the preservation of a fetus papyraceous, although in the present case there was some calcification of both the fetus and placenta.