The aim of the Italian Registry of Malnutrition in Oncology (IRMO) is to set up a digital register of newly diagnosed or treated oncologic patients to monitor their nutritional status, early identify malnutrition and investigate the implications of nutritional support management. In particular, this project aims to establish a prospective cohort of cancer patients in order to investigate the effects of nutritional status and management on overall survival (OS) and progression free survival (PFS), and analyse the effects of the nutritional management and support on patients' symptoms and QoL.

This is a multicentric longitudinal observational study on a cohort of newly diagnosed cancer patients, candidate for active treatment. In Italy, no reliable data are still available with regards to the actual implementation of adequate nutritional support management in cancer patients; only "real-world" data collected by administrative databases are available in the context of nutrition in oncology, and this somehow limits the possibility to interpret the evidence from a clinical point of view. Hence, the purpose of the intestigators is to collect "real world" clinical data on malnutrition in oncology at the national level, in order to strengthen the evidence and concretely improve nutritional care practices in oncology.

Inclusion Criteria:

• Aged ≥18 years;
• New diagnosis of the following cancers: head and neck, oesophagus/stomach, colorectal, hepato-biliary, pancreatic, lung, prostate, other urogenital, breast, gynaecological and, soft tissue sarcomas and melanomas; patients with a new diagnosis of metastatic disease will be also included;
• Eligible for active treatment;
• Written informed consent to participate in the study.

Exclusion Criteria:

• Impossibility to undertake the expected measurements;
• Impossibility to guarantee the attendance of the follow-up visits.

Newly diagnosed adult cancer patients, candidate for active treatment consecutively identified in 12 Italian IRCCS members of the ACC WG "Survivorship Care e Supporto Nutrizionale". Identification of consecutive cancer patients can be done over two weeks a month only, for the centres with the higher patients' load.

Data derived from the study are property of the Promoter, who will commit to sharing them with the Investigators of each participating centres and to publish the results of the study in order to give full and timely information to the scientific community. The results of the research could be communicated to third parties and made public in conferences by the Investigators after accordance with the Study Responsible, in compliance with the Ministerial Decree of 2.05.2006.