Anaplastic lymphoma kinase–positive anaplastic large cell lymphoma presenting as retroperitoneal fibrosis

Non-Hodgkin lymphoma mimics retroperitoneal fibrosis

“…To our knowledge, only few cases of lymphoma presenting as RF was reported in literature 9 10. Though imaging tools may help, biopsy is still necessary to differentiate from possible malignancy, especially in those who have little systemic autoimmune presentation.…”

Fibrosis retroperitoneal asociada a neoplasias malignas: Serie de casos clínicos

“…La apariencia macroscópica del retroperitoneo durante la cirugía frecuentemente no permite distinguir si la FRP es benigna o maligna 10 . La ausencia de células neoplásicas en la biopsia no excluye el diagnóstico de FRPM, por lo que el paciente debe continuar en observación 8 . En esta serie, en 5 pacientes se efectuó una biopsia retroperitoneal y en ninguno se encontró evidencias de tumor.…”

“…La forma secundaria se ha asociado a: ateromatosis aórtica, enfermedades autoinmunes, vasculitis, asbesto, drogas, enfermedades fibrosantes, radioterapia, quimioterapia, cirugía, hemorragias, infecciones, traumatismos, enfermedades relacionadas con IgG4 y tumores [1][2][3][4][5] . Esta última asociación muy infrecuente (8-10% de las FRP) [6][7][8][9][10][11][12][13] .…”

Anaplastic Large Cell Lymphoma Mimicking Fibrosing Mediastinitis

“…Two cases of breast cancer and a case of Hodgkin's lymphoma have been reported (20)(21)(22). With regard to retroperitoneal fibrosis associated with fibrosing mediastinitis, several case reports, including a case of anaplastic large cell lymphoma, have described malignant lymphoma accompanied by retroperitoneal fibrosis (23,24). Fibrosis is usually observed in the pathogenesis of nodular sclerosing classical Hodgkin's lymphoma (25).…”