We report a case of true trilineage haematopoiesis in an excised area of heterotopic ossification from an upper mid-line laparotomy scar. Heterotopic ossification is a rare complication of abdominal surgery and usually occurs when upper mid-line incisions are utilised. Whereas cases of heterotopic ossification in abdominal incisions are not exceedingly rare, true trilineage haematopoiesis in such an area of heterotopic ossification, to our knowledge, has only been previously reported once in the English literature.

We have demonstrated deficiencies in chaperone use and have identified specific factors that render A&E departments particularly vulnerable to allegations of inappropriate practice. We believe that policies should be designed and implemented focusing on the specific needs of A&E departments to counteract the rising numbers of medico-legal cases, thus safeguarding patient care and protecting the health providers.