Canine histiocytic diseases are an emerging spectrum of diseases characterized by proliferations of histiocytic cells. Nonneoplastic histiocytic disease (reactive histiocytosis, comprising cutaneous and systemic histiocytosis) is uncommon. Neoplastic histiocytic diseases include cutaneous histiocytoma, which is a benign histiocytic tumor, and localized and disseminated histiocytic sarcoma (prev...

Indeterminate cell histiocytosis is a very rare proliferative disorderof histiocytes which displays both langerhans cell histiocytosisand non langerhans cell histiocytosis immunophenotypic features.The majority of the patients develop multiple lesions which areclinically indistinguishable from generalized eruptive histiocytosis.We report a 14-year-old girl with multiple papules on the face,scal...

Langerhans’ cell histiocytosis may cause irreversible respiratory failure due to progressive destruction of lung parenchyma and widespread cystic change. Transplantation oVers a therapeutic option. A case is described of recurrence of Langerhans’ cell histiocytosis which was associated with deterioration in lung function four years following bilateral lung transplantation. Patients transplanted...

Crystal-storing histiocytosis is a rare clinical entity characterized by an increase in the number of abnormal histiocytes accompanied by accumulation of crystallized immunoglobulins. We describe the case of an 80-year-old man who presented with crystal-storing histiocytosis of the lung 13 years after receiving a diagnosis of gastric non-Hodgkin lymphoma (NHL ; clinical stage, Lugano IA). After...

Langerhans’ cell histiocytosis may cause irreversible respiratory failure due to progressive destruction of lung parenchyma and widespread cystic change. Transplantation oVers a therapeutic option. A case is described of recurrence of Langerhans’ cell histiocytosis which was associated with deterioration in lung function four years following bilateral lung transplantation. Patients transplanted...

4. Badalian-Very G, Vergilio J, Degar BA, MacConaill LE, Brandner B, Calicchio ML, et al. Recurrent BRAF mutations in Langerhans cell histiocytosis. Blood. 2010;116:1919--23. 5. Bronwn R, Rieger K, Kim J. 3 Cases of indeterminate cell histiocytosis with an ETV3-NCOA2 translocation. J Cutan Phatol. 2016;43:e56--7. 6. Wollenberg A, Burgdorf WH, Schaller M, Sander C. Long-lasting ‘‘Christmas tree ...

OBJECTIVE To report a case of late-onset self-healing Langerhans cell histiocytosis. CASE DESCRIPTION A 4½-month-old female patient presenting with an eythematopurpuric eruption underwent a skin biopsy for histopathology and was first diagnosed with isolated cutaneous Langerhans cell histiocytosis. Her lesions regressed within a few months and she was retrospectively diagnosed with late-onset...

During the past 40 years, three previously unrecognized disorders of the reticuloendothelial system have been described : Letterer-Siwe’s disease,’ Hand-Sch#{252}ller-Christian’s disease,24 and eosinophilic granuloma.5’6 Due largely to the influence of Lichtenstein,7 the opinion now prevails that these three disorders are fundamentally related. They differ from one another mainly in terms of pa...

BACKGROUND Langerhans cell histiocytosis is a rare systemic disease characterized by the abnormal overproduction of histiocytes that tend to infiltrate single or multiple organ systems leading to significant tissue damage. It mainly affects - by order of decreasing frequency - the bone, the skin, the lymph nodes, the liver, and lungs. Gastrointestinal tract involvement is extremely rare in adul...