Yes. As opined by your treating surgeon, need to wait for the biopsy report. Based on final histopathology, further plan can be decided.
Presence of mucin within appendix or around it due to rupture could be due to a mucocoele appendix/ Appendiceal mucinous neoplasms(low grade/high grade), Appendiceal mucinous adenocarcinoma.
Management differs between all of these.
Next Steps
Wait for final Histopathology report.
Health Tips
Do not be anxious to know everything beforehand. Have patience. Once all details are available further plan can be made.