title: Subcutaneous myxopapillary ependymoma presenting as a childhood sacrococcygeal tumor: a case report.
abstract: Subcutaneous myxopapillary ependymoma in a sacrococcygeal location is an uncommon lesion. We report such a case in a 16-mo-old female child, who presented with a sacrococcygeal mass since birth. The cytological picture was that of a malignant small round cell tumor and the diagnosis was missed on cytology, which was retrospectively confirmed on comparison with histology. Although rare, this lesion can be a potential diagnostic pitfall and needs to be distinguished from other malignant tumors occurring at this age and at a similar location, like sacrococcygeal teratoma with immature elements, primitive neuroectodermal tumor (PNET), and PNET with ependymal differentiation.
authors.affiliation: Cytopathology Laboratory, Department of Pathology, All India Institute of Medical Sciences, New Delhi, 110029 India.
authors.forename: I Satish
authors.initials: IS
authors.lastname: Rao
authors.forename: Kusum
authors.initials: K
authors.lastname: Kapila
authors.forename: Sandeep
authors.initials: S
authors.lastname: Aggarwal
authors.forename: Ruma
authors.initials: R
authors.lastname: Ray
authors.forename: Arun Kumar
authors.initials: AK
authors.lastname: Gupta
authors.forename: Kusum
authors.initials: K
authors.lastname: Verma
mesh_terms: D014408:Biomarkers, Tumor / Q000378:metabolism; D001707:Biopsy, Needle; D003937:Diagnosis, Differential; D004806:Ependymoma / Q000000981:diagnostic imaging / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D008591:Meningomyelocele / Q000473:pathology; D009447:Neuroblastoma / Q000473:pathology; D018242:Neuroectodermal Tumors, Primitive / Q000473:pathology; D012445:Sacrococcygeal Region / Q000000981:diagnostic imaging / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000000981:diagnostic imaging / Q000378:metabolism / Q000473:pathology*; D040521:Subcutaneous Tissue / Q000000981:diagnostic imaging / Q000378:metabolism / Q000473:pathology; D013724:Teratoma / Q000473:pathology; D014057:Tomography, X-Ray Computed
chemical_list: D014408:Biomarkers, Tumor