title: Management of patients with gastrointestinal stromal tumor in clinical practice in Italy: a critical "event tree model" analysis of decision-making processes and outcomes.
abstract: OBJECTIVE
  Even though the standard treatment of patients affected by gastrointestinal stromal tumors has been well defined by clinical trials and clinical guidelines, in practice it may be different from those proposed in the literature. This paper reports and comments on a critical picture of the management of patients with gastrointestinal stromal tumors who received at least one treatment before arriving at our GIST Study Group.
  
  
  METHODS
  Attention was focused on 60 patients from various hospitals. Retrospective clinical data were recorded and analyzed with the "event tree" model, which describes the algorithm of all treatment options that each patient received before. Responses from first to fourth line of therapy, time to progression, and survival analysis were also analyzed.
  
  
  RESULTS
  Starting from the diagnosis of disease, seven possible therapeutic event trees were identified: one for 7 unresectable patients and six different trees for 53 recurred patients who initially underwent surgery. The event trees describe the multitude of different treatments that patients with gastrointestinal stromal tumors received during the course of their disease.
  
  
  CONCLUSIONS
  In clinical practice, the treatment of patients affected by gastrointestinal stromal tumor is still difficult, and the published recommendations often do not cover all therapeutic decisions for all clinical presentations of disease. Multidisciplinary dedicated teams are needed to offer the possibility to receive appropriate surgery and innovative medical therapies. The formation of formalized GIST Units is in progress in several parts of Italy. The GIST Units can be organized in a network to facilitate discussion and agreement for the wide variety of clinical presentation.
authors.affiliation: Institute of Hematology and Medical Oncology L & A Seragnoli and Interdepartmental Centre for Cancer Research G Prodi, S Orsola-Malpighi Hospital, University of Bologna, Bologna. maria.pantaleo@unibo.it
authors.forename: Maria Abbondanza
authors.initials: MA
authors.lastname: Pantaleo
authors.forename: Monica
authors.initials: M
authors.lastname: Di Battista
authors.forename: Stefano
authors.initials: S
authors.lastname: La Rovere
authors.forename: Maria
authors.initials: M
authors.lastname: Astorino
authors.forename: Fausto
authors.initials: F
authors.lastname: Catena
authors.forename: Cristian
authors.initials: C
authors.lastname: Lolli
authors.forename: Maristella
authors.initials: M
authors.lastname: Saponara
authors.forename: Alessandra
authors.initials: A
authors.lastname: Maleddu
authors.forename: Margherita
authors.initials: M
authors.lastname: Nannini
authors.forename: Valerio
authors.initials: V
authors.lastname: Di Scioscio
authors.forename: Donatella
authors.initials: D
authors.lastname: Santini
authors.forename: Claudio
authors.initials: C
authors.lastname: Ceccarelli
authors.forename: Paola
authors.initials: P
authors.lastname: Paterini
authors.forename: Paolo
authors.initials: P
authors.lastname: Castellucci
authors.forename: Annalisa
authors.initials: A
authors.lastname: Astolfi
authors.forename: Anna
authors.initials: A
authors.lastname: Mandrioli
authors.forename: Pietro
authors.initials: P
authors.lastname: Fusaroli
authors.forename: Paola
authors.initials: P
authors.lastname: Tomassetti
authors.forename: Antonio Daniele
authors.initials: AD
authors.lastname: Pinna
authors.forename: Guido
authors.initials: G
authors.lastname: Biasco
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003131:Combined Modality Therapy; D003657:Decision Making; D005260:Female; D046152:Gastrointestinal Stromal Tumors / Q000401:mortality / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome