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.