The goal of this observational study is to better understand why some people with metastatic adenoid cystic carcinoma (ACC) of the head and neck have slow-growing disease while others have faster-growing or more aggressive disease. Researchers want to learn how the biology of the tumor relates to each person's clinical risk group, which is based on a published prediction tool (a nomogram). The main question the study aims to answer is: Do people in the high-risk and low-risk groups have different biological tumor types (called ACC-I and ACC-II) when their primary tumor is tested? The study will also look at other important questions, such as: * Do metastatic tumors show the same biological type as the original tumor? * Do biological types differ based on where metastases grow or how early or late they appear? * Are biological types linked to how well systemic treatments work? * Can blood tests (including DNA fragments or small RNA molecules in the blood) show the same tumor biology and help track how the cancer changes over time? Participants will: * Allow researchers to study samples of tumor tissue taken in the past during standard care. * Give blood samples at study entry and then every 6 months for up to 2 years. * Continue all medical treatments and follow-up visits as decided by their own care team. * Receive no study treatment; this study only collects information and samples. About 114 adults with metastatic ACC of the head and neck will join the study. People with only local or regional recurrence (without metastases) or those whose primary tumor started outside the head and neck cannot take part. The information gathered may help researchers understand why ACC behaves differently from person to person, identify new biological markers in blood, and support future personalized treatment strategies for people with metastatic ACC.
Study Type
OBSERVATIONAL
Enrollment
114
This study does not include any medical treatment or experimental therapy. The only study-specific procedures are the collection and analysis of biological samples. The intervention consists of: * Use of stored tumor tissue collected previously as part of standard medical care. * At least two blood draws: one at study entry, one before the start of routine cancer treatment and one after 6 months. * Laboratory analyses of these samples to study gene activity, DNA fragments, DNA methylation, and circulating microRNAs. * Digital analysis of tumor slides using computer-based tools to identify biological patterns. These procedures are used only to compare blood-based markers with tumor-based markers. They do not change or influence the participant's medical treatment, which is decided entirely by their usual care team.
Fondazione IRCCS Istituto Nazionale dei Tumori
Milan, Italy
RECRUITINGBiology behind the nomogram-based classes of metastatic H&N ACC by assessing the relationship between the two clinical nomogram-based classes (high- vs. low-risk) and the proteogenomic subtype classification (ACC-I vs. ACC-II) in primary tumors
The frequency of cases with ACC-I and ACC-II (proteogenomic subtype classification assessed in primary tumor specimens) in high- vs. low-risk (clinical nomogram-based) metastatic ACC patients.
Time frame: 24 months
To assess if the proteogenomic subtype described in primary tumors is found in distant metastases
The frequency of cases in which the proteogenomic subtype found in primary tumor is unchanged in distant metastases (i.e., percentage of patients with ACC-I in both primary tumor and distant metastases; percentage of patients with ACC-II in both primary tumor and distant metastases) vs. the frequency of cases in which the proteogenomic subtype found in primary tumor is different from the one found in distant metastases (i.e., percentage of patients with ACC-I in primary tumor and ACC-II in distant metastases; percentage of patients with ACC-II in primary tumor and ACC-I in distant metastases)
Time frame: 24 months
To assess if the proteogenomic subtypes in primary tumors reflect the spatio-temporal tumor biology heterogeneity (primary tumor vs. distant metastases; lung vs. non-lung metastases; early vs. late metastases)
The distribution of proteogenomic subtype found in primary tumor and the one found in patients with lung metastases vs. the frequency of proteogenomic subtype found in primary tumor and the one found in patients without lung disease (i.e., percentage of patients with lung metastasis having an ACC-I or an ACC-II profile in primary tumor; percentage of patients without lung metastasis having an ACC-I or an ACC-II profile in primary tumor)
Time frame: 24 months
To assess if the proteogenomic subtype found in primary tumor is associated to objective response to systemic therapy.
The objective response rate (ORR) to systemic therapies based on the proteogenomic subtypes (i.e., ORR in patients with ACC-I vs. ORR in patients with ACC-II).
Time frame: 24 months
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