To the Editor. —
Of the various types of ectopic pregnancies that have been reported, the retroperitoneal implantation probably represents the rarest. A search of the literature reveals only one other case1 that appears to be a true retroperitoneal pregnancy. Another report2 appears, in fact, to be a case of intraligamentous pregnancy.
Report of a Case.—
The patient was a 30-year-old woman with a history of three previous uneventful pregnancies. Her last menstrual period was Oct 18, 1975, and a pregnancy test was positive on Dec 1, 1975. A slightly enlarged uterus had been noted by her obstetrician on Dec 22. Because of some vaginal spotting therapy with dydrogesterone, 10 mg twice a day, was begun. The bleeding increased, and nine days later the uterus was noted to be slightly enlarged with a dilated cervix. It was felt that this represented a poor pregnancy, and a suction curettage
Sotus PC. Retroperitoneal Ectopic Pregnancy: A Case Report. JAMA. 1977;238(13):1363–1364. doi:10.1001/jama.1977.03280140041007