Anatomy and embryology of umbilicus in newborns: a review and clinical correlations.
Hegazy AA.
Front Med. 2016 Sep;10(3):271-7. doi: 10.1007/s11684-016-0457-8. Epub 2016 Sep 7.
PMID:27473223
Histomorphology of the lesions of the umbilicus: Are we naive about the navel?
Singaravel S, Yadav PC.
Indian J Pathol Microbiol. 2021 Jan-Mar;64(1):91-95. doi: 10.4103/IJPM.IJPM_146_20.
PMID:33433415
Surgical treatment of primary melanoma of the umbilicus with sentinel lymph node biopsy and plastic reconstruction: case report and review of the literature.
Zaccagna A, Siatis D, Pisacane A, Giacone E, Picciotto F.