Authors: Sushma Prasanthi Nagireddi*, Rashmi Shetty, Athira K P, Madhukar Devadiga, Kuladeepa Ananda Vaidya
Neoplastic lesions of appendix occurs only in 1% of the appendicectomy specimens. Its often an incidental finding. Collision tumours of appendix composed of a neuroendocrine tumor and low grade appendiceal mucinous neoplasm (LAMN) is a very rare event. We present here such a rare case. A 30 year old male presented clinically as acute appendicitis. But during the histopathological evaluation it was found to have a collision tumor of appendix. Low grade appendiceal mucinous neoplasm of appendix was detected at the tip of the appendix and well differentiated neuroendocrine tumor was detected at the base of the appendix. The diagnosis was further confirmed with immunohistochemistry. After the diagnosis a revised hemicolectomy with pelvic lymph node dissection was performed. No residual tumor or tumor deposits were identified. Since it’s a rare condition an optimal treatment plan needs to be structured to avoid future morbidity. Keywords: Appendix, Low grade appendiceal mucinous neoplasm, Neuroendocrine tumours, Collision tumours
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