Tumor fibrohistiocítico plexiforme con metástasis ganglionar: reporte de un caso

We report a case of a 10 year old boy with progressive tumour growth, under the skin in the right knee with ipsilateral inguinal lymphadenopathy. He underwent wide resection of the lesion with inguinal lymphadenectomy. Histopathology revealed a plexiform pattern with a biphasic component (mononuclear histiocytic cells associated with CD68 positive osteoclast-like giant cells and smooth muscle actin-positive spindle cells); favoring the diagnosis of TFHP with lymph node metastasis.