en تخصصي Special گزارش مورد case report Injection of synthetic fillers for soft tissue augmentation is increasing over the last decade. One of the most common materials used is hyaluronic acid (HA) that is safe and temporary filler for soft tissue augmentation. We present a case of 54-year-old female who experienced vascular occlusion and nasal alar necrosis following HA injection to the nasolabial folds. She suffered from pain, necrosis, infection, and alar loss that finally required a reconstructive surgery for cosmetic appearance of the nose. The case highlights the importance of proper injection technique by an anesthesiologist, as well as the need for immediate recognition and treatment of vascular occlusion. Hyaluronic acid, Soft tissue, Injection, Alar necrosis 74 78 http://wjps.ir/browse.php?a_code=A-10-1-49&slc_lang=en&sid=1 Ali Manafi 1003194753284600794 1003194753284600794 No Behrooz Barikbin 1003194753284600795 1003194753284600795 No Amir Manafi 1003194753284600796 1003194753284600796 Yes Zahra Sadat Hamedi 1003194753284600797 1003194753284600797 No