Systemic Mastocytosis

This study is being done to better understand how symptoms of Systemic Mastocytosis (SM) relate to biological signals and to better understand how different treatments affect these signals.

This observational study aims to evaluate the diagnostic value and clinical utility of detecting the KIT-D816V mutation in the peripheral blood of adult patients with systemic mastocytosis (SM), using droplet digital PCR (ddPCR). Currently, the diagnosis of SM relies heavily on invasive bone marrow biopsies. This study will determine whether highly sensitive ddPCR testing of peripheral blood could provide a reliable, minimally invasive alternative for detecting the KIT-D816V mutation, which is a key driver of the disease and a major diagnostic criterion. The results could optimize the diagnostic process and continuous monitoring of adult SM patients.

Given the renewed focus on mastocytosis (recognized in Italy as a rare disease since 2018) and emerging clinical and immunogenetic knowledge, and considering the rarity of the disease and limited understanding of its progression, this observational study aims to analyze epidemiological, clinical, genetic, immunohistochemical, and laboratory characteristics of patients with mastocytosis. This will help expand knowledge about the disease and identify prognostic variables useful in developing a personalized therapeutic approach. This registry aims to collect retrospective and prospective data on patients with cutaneous and systemic mastocytosis attending the Dermatology Unit at the IRCCS Fondazione Policlinico San Matteo. This is a single-center longitudinal hospital registry including patients with cutaneous and systemic mastocytosis, collected retrospectively and prospectively to assess the clinical, serological, hematological, and molecular characteristics of patients with cutaneous and systemic mastocytosis and their correlation with specific outcomes such as disease variant (cutaneous or systemic), extent of skin involvement, and survival rate.