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Localised renal Langerhans cell histiocytosis coexisting with unilateral renal clear cell carcinoma
  1. Saddam Yasin1,
  2. Ike Uzoaru2 and
  3. Gregory Maurer3
  1. 1Department of Internal Medicine, Carle Foundation Hospital, Urbana, Illinois, USA
  2. 2Pathology and Lab Sciences, Carle Foundation Hospital, Urbana, Illinois, USA
  3. 3Department of Urology, Carle Foundation Hospital, Urbana, Illinois, USA
  1. Correspondence to Dr Saddam Yasin; saddamyasinmd{at}


Langerhans cell histiocytosis (LCH) is an uncommon group of disorders, which can be either localised or systemic, characterised by abnormal proliferation of monocytes, macrophages and dendritic cells. These disorders represent an aberrant response of myeloid progenitor cells. Bones are the most commonly affected organ but there can be involvement of the skin, lungs, liver and spleen. Renal involvement, however, is rare. LCH is the most commonly seen in children but certain rare forms such as Erdheim-Chester disease can be seen in adults. In this report, we present a case of clear cell renal adenocarcinoma (CCRC) admixed with LCH in a patient with history of smoking and presenting with abdominal pain and heamaturia. Imaging revealed left renal lesion and subsequently left renal nephrectomy was performed with tissue biopsy showing grade 3 clear cell renal cell carcinoma admixed with neoplastic LCH.

  • urological cancer
  • cancer intervention

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  • Contributors All the authors have access to the data and a role in the writing of the manuscript. IU identified the rarity of the case and had a part in making and providing the histology slides. SY and GM have a role in writing the manuscript and discussion part of the article.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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