title: A cyclical cyst of the umbilicus.
authors.affiliation: Department of Dermatology, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK. rs280@doctors.org.uk
authors.forename: R
authors.initials: R
authors.lastname: Sinha
authors.forename: C
authors.initials: C
authors.lastname: Macedo
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004715:Endometriosis / Q000473:pathology*; D005260:Female; D006801:Humans; D010507:Periodicity; D012871:Skin Diseases / Q000473:pathology*; D014472:Umbilicus / Q000473:pathology*