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Updated: May 23, 2026

Dissection and Explant Culture of Murine Allantois for the In Vitro Analysis of Allantoic Attachment
Published on: January 13, 2018
Umbilical concretion
David Sheehan1, Sarwat Hussain, Gopal Vijayaraghavan
1Department of Radiology, University of Massachusetts Medical School, 55 Lake Ave North, Worcester, MA 01655, USA. sheehd01@ummhc.org
Abstract:
Umbilical concretion is a rarely encountered benign entity. Concretions typically form within an umbilical cleft which is unusually deep and consist of keratinaceous and sebaceous material. Lack of attention to umbilical hygiene usually plays a role in their formation. Concretions are generally asymptomatic and may only present clinically when complicated by inflammation or infection. Their appearance on imaging studies may be problematic for the radiologist given their rarity, particularly in the setting of a known or suspected intra-abdominal malignancy.
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