title: Sarcoidosis lung nodules in colorectal cancer follow-up: sarcoidosis or not?
abstract: OBJECTIVE
  Sarcoidosis is a multisystem chronic granulomatous disease found predominantly in the lungs and lymph nodes. Its pathologic hallmark is the presence of noncaseating granulomas. Sarcoidosis is a chronic inflammatory condition that may increase the risk of cancer, yet at the same time, cancer can be associated with a sarcoid-like reaction.
  
  
  METHODS
  It is difficult to distinguish between sarcoidosis and sarcoid-like reactions because their imaging characteristics are identical. We report on 3 cases of sarcoidosis or sarcoid-like reactions in patients with colorectal cancer and highlight the diagnosis process.
  
  
  RESULTS
  Systemic symptoms observed in patients with sarcoidosis commonly can be masked or mimicked by symptoms related to the malignancy. Moreover, it is important to distinguish between the 2 entities to give patients adequate therapy.
  
  
  CONCLUSIONS
  Our cases focused on the usefulness of histologic proof in patients with cancer with sarcoidosis.
authors.affiliation: Gastroenterology and Endoscopy Unit, Hôpital Cochin, AP-HP, Université Paris Descartes, Sorbonne Paris Cité, Paris, France.
authors.forename: Marie
authors.initials: M
authors.lastname: Lequoy
authors.forename: Romain
authors.initials: R
authors.lastname: Coriat
authors.forename: Alexandre
authors.initials: A
authors.lastname: Rouquette
authors.forename: Olivier
authors.initials: O
authors.lastname: Mir
authors.forename: Géraldine
authors.initials: G
authors.lastname: Perkins
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Regnard
authors.forename: Catherine
authors.initials: C
authors.lastname: Brezault
authors.forename: Stanislas
authors.initials: S
authors.lastname: Chaussade
mesh_terms: D044963:Biopsy, Fine-Needle; D015179:Colorectal Neoplasms / Q000150:complications*; D003937:Diagnosis, Differential; D005260:Female; D006099:Granuloma / Q000473:pathology*; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000209:etiology; D008198:Lymph Nodes / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D049268:Positron-Emission Tomography / Q000379:methods; D017565:Sarcoidosis, Pulmonary / Q000175:diagnosis* / Q000209:etiology