Hydatids of Morgagni are remnants of Mullerian ducts. Normally, these ducts regress due to absence of androgen during development of female genital system, however, its persistence can lead to remnants known as Hydatids of Morgagni. These are benign lesions with pedunculated and cystic structure. These lesions are clinically not significant, however, torsion can lead to infarction and pain. Reference: https://pubmed.ncbi.nlm.nih.gov/12216437/#:~:text=Background%3A%20Hydatids%20of%20Morgagni%20are,becomes%20twisted%20and%20infarction%20occurs. Image via: https://www.jpedsurg.org/article/S0022-3468(11)00445-3/references