344P - Single-centre analysis of anti-resorptive agent-related osteonecrosis of the jaw in lung cancer patients

Background

Over the past two decades, anti-resorptive agent-related osteonecrosis of the jaw (ARONJ) has become a growing concern. We examined the incidence of ARONJ and identified its risk factors in lung cancer patients in the real-world clinical setting. To our knowledge, we are the first to do so.

Methods

We retrospectively analysed lung cancer patients with bone metastases who had received anti-resorptive agents (zoledronate or denosumab) at the National Hospital Organization Kyoto Medical Center from October 2012 to September 2018. All ARONJ cases were diagnosed by the dentists according to the established diagnostic criteria.

Results

A total of 171 patients were reviewed, 13 (7.6%) of whom experienced ARONJ. Among the 13 patients, six (46.2%), four (30.8%), and three (23.1%) had adenocarcinoma, squamous carcinoma, and not otherwise specified, respectively. ARONJ was stage 2 in three (23.1%) patients and stage 3 in 10 (76.9%). More cycles of anti-resorptive agents (OR, 11.54; 95% CI, 2.47–53.99; P <0.01), and longer survival duration (≥2 years) (OR, 12.16; 95% CI, 3.17–46.65; P <0.01) were independently associated with ARONJ in a multivariate analysis.

Conclusions

The incidence of ARONJ was relatively high in lung cancer patients with bone metastases. When using anti-resorptive agents, oncologists should closely monitor patients for ARONJ during the course of treatment and regularly consult with dentists.

Clinical trial identification

Editorial acknowledgement

Legal entity responsible for the study

The authors.

Funding

Has not received any funding.

Disclosure

All authors have declared no conflicts of interest.