Side Effects of Autologous Fat Grafting for Cheek Augmentation

Autologous fat grafting—commonly known as fat transfer—is a widely used aesthetic procedure for facial volumization, particularly to restore fullness in the cheeks. While generally considered safe when performed by experienced, board-certified plastic surgeons, the technique carries several potential adverse effects that patients should understand before undergoing treatment.

One of the most frequent complications is partial or complete fat graft resorption. Because only a portion of transferred adipocytes survive long-term—typically 40–70% depending on surgical technique and patient factors—some degree of volume loss is expected within the first three to six months. This may necessitate touch-up procedures to achieve or maintain desired results.

Other notable complications include contour irregularities such as lumps, nodules, or asymmetry, often resulting from uneven fat distribution, inadequate fat processing, or inconsistent injection technique. In rare cases, fat embolism can occur if adipose tissue inadvertently enters the vasculature—particularly concerning when injecting near the infraorbital or angular arteries—potentially leading to vision impairment or, in extreme cases, cerebral or pulmonary complications.

Infection, though uncommon with strict aseptic protocols, remains a risk, especially if donor site harvesting or recipient site injection is not meticulously managed. Delayed-onset inflammatory reactions—including persistent edema, induration, or granuloma formation—may also arise weeks to months postoperatively, sometimes mimicking neoplastic conditions on imaging.

Additional considerations include transient bruising, swelling, and donor-site morbidity (e.g., contour deformity or scarring at the liposuction site). Patients with uncontrolled diabetes, active infection, or significant coagulopathy are typically poor candidates due to impaired healing and increased complication risks.

Given these potential adverse effects, thorough preoperative counseling, meticulous surgical planning, and adherence to evidence-based fat harvesting, processing, and injection techniques are essential to optimize safety and outcomes in autologous fat grafting to the malar region.