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Martin Fassnacht, Olaf M Dekkers, Tobias Else, Eric Baudin, Alfredo Berruti, Ronald R de Krijger, Harm R Haak, Radu Mihai, Guillaume Assie and Massimo Terzolo

Adrenocortical carcinoma (ACC) is a rare and in most cases steroid hormone-producing tumor with variable prognosis. The purpose of these guidelines is to provide clinicians with best possible evidence-based recommendations for clinical management of patients with ACC based on the GRADE (Grading of Recommendations Assessment, Development and Evaluation) system. We predefined four main clinical questions, which we judged as particularly important for the management of ACC patients and performed systematic literature searches: (A) What is needed to diagnose an ACC by histopathology? (B) Which are the best prognostic markers in ACC? (C) Is adjuvant therapy able to prevent recurrent disease or reduce mortality after radical resection? (D) What is the best treatment option for macroscopically incompletely resected, recurrent or metastatic disease? Other relevant questions were discussed within the group. Selected Recommendations: (i) We recommend that all patients with suspected and proven ACC are discussed in a multidisciplinary expert team meeting. (ii) We recommend that every patient with (suspected) ACC should undergo careful clinical assessment, detailed endocrine work-up to identify autonomous hormone excess and adrenal-focused imaging. (iii) We recommend that adrenal surgery for (suspected) ACC should be performed only by surgeons experienced in adrenal and oncological surgery aiming at a complete en bloc resection (including resection of oligo-metastatic disease). (iv) We suggest that all suspected ACC should be reviewed by an expert adrenal pathologist using the Weiss score and providing Ki67 index. (v) We suggest adjuvant mitotane treatment in patients after radical surgery that have a perceived high risk of recurrence (ENSAT stage III, or R1 resection, or Ki67 >10%). (vi) For advanced ACC not amenable to complete surgical resection, local therapeutic measures (e.g. radiation therapy, radiofrequency ablation, chemoembolization) are of particular value. However, we suggest against the routine use of adrenal surgery in case of widespread metastatic disease. In these patients, we recommend either mitotane monotherapy or mitotane, etoposide, doxorubicin and cisplatin depending on prognostic parameters. In selected patients with a good response, surgery may be subsequently considered. (vii) In patients with recurrent disease and a disease-free interval of at least 12 months, in whom a complete resection/ablation seems feasible, we recommend surgery or alternatively other local therapies. Furthermore, we offer detailed recommendations about the management of mitotane treatment and other supportive therapies. Finally, we suggest directions for future research.

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Alfredo Berruti, Rossella Libè, Marta Laganà, Hester Ettaieb, Mohamad Anas Sukkari, Jérôme Bertherat, Richard A Feelders, Salvatore Grisanti, Jérôme Cartry, Gherardo Mazziotti, Sandra Sigala, Eric Baudin, Harm Haak, Mouhammed Amir Habra and Massimo Terzolo

Introduction

Adrenocortical carcinoma (ACC) is a rare cancer that commonly spreads to the liver, lungs and lymph nodes. Bone metastases are infrequent.

Objective

The aim of this report was to describe the clinical characteristics, survival perspective, prognostic factors and frequency of adverse skeletal-related events (SREs) in patients with ACC who developed bone metastasis.

Methods

This is a retrospective, observational, multicenter, multinational study of patients diagnosed with bone metastases from ACC who were treated and followed up in three European countries (France, Italy and The Netherlands) and one center in the United States.

Results

Data of 156 patients were captured. The median overall survival was 11 months. SREs occurred in 47% of patients: 17% bone fractures, 17% spinal cord compression, 1% hypercalcemia, 12% developed more than one SRE. In multivariate analysis, cortisol hypersecretion was the only prognostic factor significantly associated with a higher mortality risk (hazard ratio (HR) 2.24, 95% confidence interval (CI): 1.19–4.23, P = 0.013) and with the development of a SREs (of border line significance). The administration of antiresorptive therapies (bisphosphonates and denosumab) was associated with a lower risk of death, even if not significant, and their survival benefit appeared confined in patients attaining serum mitotane levels within the therapeutic range.

Conclusion

Bone metastases in ACC patients are associated with poor prognosis and high risk of SREs. Cortisol hypersecretion was the only prognostic factor suggesting a potential benefit from antisecretory medications. The therapeutic role of bisphosphonates and denosumab to improve patient outcome deserves to be tested in a prospective clinical trial.

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Alfredo Berruti, Paola Sperone, Anna Ferrero, Antonina Germano, Arianna Ardito, Adriano Massimiliano Priola, Silvia De Francia, Marco Volante, Fulvia Daffara, Daniele Generali, Sophie Leboulleux, Paola Perotti, Eric Baudin, Mauro Papotti and Massimo Terzolo

Background

There is a strong rationale in the use of antiangiogenic therapy in the management of adrenocortical carcinoma (ACC). Metronomic administration of chemotherapy and antiangiogenic drugs can be synergistic in targeting endothelial cells.

Objective

We assessed the activity of sorafenib plus metronomic paclitaxel as second/third-line therapy in advanced ACC patients. We also tested the activity of sorafenib and paclitaxel against NCI-H295R in vitro.

Design

Multicenter, prospective phase II trial.

Setting

Referral centers for ACC.

Methods

Twenty-five consecutive metastatic ACC patients who progressed after mitotane plus one or two chemotherapy lines were planned to be enrolled. The patients received a combination of i.v. paclitaxel (60 mg/m2 every week) and oral sorafenib (400 mg twice a day) till progression. The primary aim was to measure the progression-free survival rate after 4 months and the secondary aims were to assess the objective response rate and toxicity.

Results

Tumor progression was observed in nine evaluable patients at the first assessment. These results led to the premature interruption of the trial. The treatment was well tolerated. The most relevant toxicities were fatigue, being grade 2 or 3 in four patients, and hypophosphatemia, being grade 3 in three patients. In the in vitro study, sorafenib impaired the viability of H295R cells with dose–response and time–response relationships. The in vitro sorafenib activity was not increased in combination with paclitaxel.

Conclusions

Despite the in vitro activity, sorafenib plus weekly paclitaxel is an inactive salvage treatment in patients with advanced ACC and should not be recommended.

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Deborah Cosentini, Giuseppe Badalamenti, Salvatore Grisanti, Vittoria Basile, Ida Rapa, Sara Cerri, Andrea Spallanzani, Paola Perotti, Emanuela Musso, Marta Laganà, Vittorio D Ferrari, Gabriele Luppi, Alberto Dalla Volta, Lorena Incorvaia, Sandra Sigala, Antonio Russo, Marco Volante, Massimo Terzolo and Alfredo Berruti

Objective

Temozolomide has shown a significant anti-proliferative activity on adrenocortical cancer (ACC) cells in vitro.

Design

On the basis of these results the drug was prescribed as second/third line in advanced metastatic ACC patients in four referral centers in Italy.

Methods

We retrospectively collected anagraphic, clinical and pathological data of patients with advanced ACC with disease progression to standard chemotherapy plus mitotane who were treated with temozolomide at the dose of 200 mg/m2/die given for 5 consecutive days every 28 days. The primary endpoint was the disease control rate, defined as objective response or disease stabilization after 3 months. Secondary endpoints were overall survival (OS), progression-free survival (PFS) and drug safety.

Results

Twenty-eight patients have been included in the study. Ten patients (35.8%, 95% CI: 17.8–53.8) obtained a disease control from temozolomide treatment. In particular, 1 patient had a complete response, 5 patients a partial response and 4 patients stable disease. Median PFS was 3.5 months and median OS was 7.2 months. Disease response was more frequently observed in patients with methylation of O6-methylguanine-DNA methyltransferase (MGMT) gene. Temozolomide therapy was well tolerated and most toxicities were limited to grade G1–2 according to WHO criteria.

Conclusion

Temozolomide was found active in the management of advanced ACC patients. The disease control rate obtained, however, was short-lived and the prognosis of treated patients was poor.