Histiocytose langerhansienne encéphalique isolée à forme pseudotumorale: une observation et revue de la littérature

29 year-old male with seizure and syncope. Intracerebral Langerhans cell histiocytosis

Langerhans cell histiocytosis (LCH), previously referred to as histiocytosis X, is a dendritic cell histiocytic tumor that demonstrates a variable spectrum of organ involvement. Clinical syndromes within this entity include eosinophilic granuloma, Hand-Schuller-Christian disease, Abt-Letterer-Siwe Disease, and Hashimoto-Pritzker disease. Currently, it is classified on the basis of extent, such as unifocal, multifocal, or disseminated disease. LCH typically occurs in childhood and adolescence as solitary osteolytic lesions. When involving the central nervous system, it is usually either a result of extra-axial extension from skull vault epicenters, or is restricted to the hypothalamic-pituitary axis. Discrete intraparenchymal, intra-axial CNS lesions are rare. This report presents a case of an intra-axial LCH in a 29 year-old male who, following this diagnosis, was found to have multiple pulmonary lesions on imaging, attributed to the same disease process.

Sonography of biopsy-proven Langerhans cell histiocytosis in lymph nodes of the neck

OBJECTIVE

The purpose of this series is to describe the sonographic findings of lymph nodes of the neck involved by Langerhans cell histiocytosis (LCH).

METHODS

We reviewed and interpreted available images of lymph nodes in patients with cervical lymphadenopathies involved by LCH for the past decade. In all patients, each abnormal lymph node was pathologically confirmed by the use of a sonographically guided core needle biopsy or an incisional biopsy.

RESULTS

We characterized 3 different kinds of imaging findings for cervical lymph nodes involved by LCH: (1) a lymphomalike lesion, (2) a lesion similar to reactive lymphadenopathy, and (3) a cystic lymph node.

CONCLUSIONS

There was no specific imaging finding to diagnose lymphadenopathy involved by LCH. In our study, we characterized 3 different imaging patterns of lymph node involvement by LCH. This study represents an initial step to organize specific findings for LCH.