Introduction
The umbilicus is a remaining scar in the center of the abdomen following
the removal of the umbilical cord (1). It has different shapes. Multiple
affections can raise in this area including metastasis (Mary Joseph’s
nodule) and endometriosis. Less commonly reported yet benign conditions
are important to diagnose. Omphalolith is a rare and underdiagnosed
entity due to the accumulation of sebum and keratin in the umbilicus. It
usually occurs in the elderly with deep and narrow umbilicus. Neglect
and poor corporal hygiene represent the main risk factors. Early
recognition of omphalolith is important to prevent unnecessary
investigations and anxiety. Delayed diagnosis may lead to complications
including irritation, erosions, bleeding, pyogenic granuloma, abscess
formation, cellulitis or even peritonitis. We report herein two new
cases of omphalolith and provide a comprehensive summary of its
characteristics.