Parietal peritoneal lipomas: a first case report of two lipomas of the parietal peritoneum.

Parietal peritoneal lipomas are a rare surgical entity with seven case reports in the published literature. Their aetiology remains nebulous and includes theories such as misplaced embryonic tissue, adipose hyperproliferation, trauma and fat herniation or excessive obesity. This is the first case report in the literature with two parietal peritoneal lipomas incarcerated in an umbilical hernia. We strongly advocate for an international rare tumour registry, given the sparsity of data on these tumours and their possible malignant potential, which we believe would help potentiate an effective treatment protocol for future cases.