Recurrent parachordoma of the lower back: A case report

Parachordoma is a rare entity with less than 50 cases described in the literature. This soft-tissue tumor resembles chordomas as well as extraskeletal myxoid chondrosarcomas and has only recently been fully characterized. Here we describe the case of a patient with a lower back parachordoma and its subsequent postresection recurrence 9 years after the initial procedure, emphasizing the importance of long-term follow-up in individuals with this diagnosis. Keywords: Recurrent parachordoma, Chordoma periphericum, Chordoid sarcom

Langerhans cell histiocytosis of bone in an adult: A case report

Langerhans cell histiocytosis (LCH) may clinically manifest in a variety of ways due to its ability to involve nearly every organ system. LCH may present as a single bone lesion, skin rash, or as invasive disseminated disease and occurs typically in the pediatric and adolescent population, affecting both males and females. Independent of its clinical presentation and severity, LCH lesions share the common histology of CD1a+/CD207+ dendritic cells along with an inflammatory infiltrate, and, based upon improved scientific understanding, is now classified as a myeloproliferative neoplasm. We present a case report of an adult diagnosed with LCH of the pelvis. Keywords: Langerhans cell histiocytosis, Adults, Pelvi