title: Cytologic features and differential diagnosis in a case of extraskeletal mesenchymal chondrosarcoma: a case report.
abstract: BACKGROUND
  Extraskeletal myxoid chondrosarcoma (EMC) is an uncommon tumor. On fine needle aspiration (FNA) it has to be distinguished from other benign and malignant soft tissue lesions.
  
  
  METHODS
  FNA was done on an 85-year-old man with painful swelling of the forearm. Smears showed fragments comprised of polygonal cells with eccentric nuclei and peripheral fine cytoplasmic vacuoles embedded in a dense, metachromatic matrix. Cell block showed similar cells in a chondromyxoid stroma. The cells were positive for S100 and negative for cytokeratin.
  
  
  CONCLUSIONS
  FNA is a useful tool in the diagnosis of EMC in conjunction with radiology. A preoperative diagnosis can be made due to its distinct cytologic and immunohistochemical features, obviating the need for a biopsy.
authors.affiliation: Department of Pathology, Government Medical College, Chandigarh, India.
authors.forename: Uma
authors.initials: U
authors.lastname: Handa
authors.forename: Niti
authors.initials: N
authors.lastname: Singhal
authors.forename: Rajpal Singh
authors.initials: RS
authors.lastname: Punia
authors.forename: Sudhir
authors.initials: S
authors.lastname: Garg
authors.forename: Harsh
authors.initials: H
authors.lastname: Mohan
mesh_terms: D000369:Aged, 80 and over; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000473:pathology*; D002467:Cell Nucleus / Q000473:pathology; D018211:Chondrosarcoma, Mesenchymal / Q000175:diagnosis* / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male