title: Spectrum of abdominal imaging findings in histiocytic disorders.
abstract: OBJECTIVE
  The present article provides an overview of the spectrum of abdominal findings of histiocytic disorders that may be observed in multimodality imaging illustrated by clinical cases from our Imaging Center.
  
  
  METHODS
  We will review abdominal findings of Langerhans cell histiocytosis, Rosai-Dorfman disease, Erdheim-Chester disease, and hemophagocytic syndrome illustrated by clinical cases from our imaging department with histologic correlation.
  
  
  RESULTS
  Abdominal involvement of histiocytic disorders is rare and may occur in the liver, biliary tract, kidney, retroperitoneum, kidney, gastrointestinal tract, and lymph nodes.
  
  
  CONCLUSIONS
  Histiocytic disorders encompass a group of rare diseases with a wide range of manifestations in which the abdominal involvement is quite infrequent. The role of the radiologist is to report the major imaging findings and the differential diagnosis; however, the imaging features are unspecific and biopsy usually is necessary to establish the definitive diagnosis.
authors.affiliation: Institute of Radiology, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar s/n, São Paulo, 05403-900, Brazil.
authors.forename: Natally
authors.initials: N
authors.lastname: de Souza Maciel Rocha Horvat
authors.affiliation: Institute of Radiology, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar s/n, São Paulo, 05403-900, Brazil.
authors.forename: Clovis Rego
authors.initials: CR
authors.lastname: Coelho
authors.affiliation: Institute of Radiology, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar s/n, São Paulo, 05403-900, Brazil.|Department of Pathology, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar s/n, São Paulo, 05403-900, Brazil.
authors.forename: Larissa Cardoso
authors.initials: LC
authors.lastname: Roza
authors.affiliation: Institute of Radiology, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar s/n, São Paulo, 05403-900, Brazil.
authors.forename: Rodrigo Canellas
authors.initials: RC
authors.lastname: de Souza
authors.affiliation: Department of Radiology, Hospital Israelita Albert Einstein, Av. Albert Einstein, 627, São Paulo, 05651-901, Brazil.
authors.forename: Yves Bohrer
authors.initials: YB
authors.lastname: Costa
authors.affiliation: Department of Pathology, Hospital Israelita Albert Einstein, Av. Albert Einstein, 627, São Paulo, 05651-901, Brazil.
authors.forename: Ebe Christie
authors.initials: EC
authors.lastname: de Oliveira
authors.affiliation: Institute of Radiology, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar s/n, São Paulo, 05403-900, Brazil.
authors.forename: Manoel
authors.initials: M
authors.lastname: de Souza Rocha
authors.affiliation: Institute of Radiology, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar s/n, São Paulo, 05403-900, Brazil. rbaroni@einstein.br.|Department of Radiology, Hospital Israelita Albert Einstein, Av. Albert Einstein, 627, São Paulo, 05651-901, Brazil. rbaroni@einstein.br.
authors.forename: Ronaldo Hueb
authors.initials: RH
authors.lastname: Baroni
mesh_terms: D034841:Abdominal Cavity / Q000473:pathology; D015614:Histiocytosis / Q000175:diagnosis*; D006801:Humans; D064847:Multimodal Imaging
keywords: Erdheim–Chester disease; Hemophagocytic syndromes; Histiocytosis; Langerhans cell histiocytosis; Rosai–Dorfman disease