Endometriosis of the abdominal wall scar is rare, reported incidence being 1.08% for mid-trimester abortion and 0.03-0.4% following caesarean sections. Incisional endometriosis is a relatively rare entity and is often misdiagnosed as stitch granuloma, abscess, incisional hernia, lipoma, hematoma, desmoid tumor, sarcoma, lymphoma, or primary and metastatic cancer.We report three cases of abdominal scar endometriosis; two cases occurring in the surgical scar of previous caesarean incision and one case occurring after second trimester hysterotomy.The present study describes the physical signs and symptoms and cytological features of abdominal scar endometriosis. A high index of suspicion is needed for early diagnosis of this entity in a woman presenting with post operative abdominal lump.