title: Case reports: Osteogenic sarcoma of the patella spread to lateral meniscus after arthroscopy.
abstract: Our patient presented with a rare lesion, a patella osteogenic sarcoma that spread to the anterior horn of the lateral meniscus via the arthroscope. He was treated arthroscopically for a torn medial meniscus of his right knee. A lesion in the patella was observed and a biopsy specimen was obtained through the arthroscope. The specimen was diagnosed as an osteogenic sarcoma. After 2 weeks of neoadjuvant chemo-therapy, the patient refused additional chemotherapy. Re-section of the knee and allograft arthrodesis were done 4 months after the initial arthroscopy. Pathologic examination of the resected specimen showed osteogenic sarcoma of the patella and a completely separate 1.0-cm nodule of osteogenic sarcoma tissue growing in the anterior horn of the lateral meniscus. The patient died 15 months after knee re-section with multiple pulmonary metastases. We are unaware that such an occurrence of an osteosarcoma spread through an arthroscope has been documented pathologically and reported.
authors.affiliation: Department of Orthopaedic Surgery, School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo General Hospital, Buffalo, New York 14203, USA.
authors.forename: Brian E
authors.initials: BE
authors.lastname: McGrath
authors.forename: Daniel
authors.initials: D
authors.lastname: Schlatterer
authors.forename: Eugene R
authors.initials: ER
authors.lastname: Mindell
mesh_terms: D001182:Arthroscopy / Q000009:adverse effects*; D001706:Biopsy / Q000009:adverse effects; D001859:Bone Neoplasms / Q000473:pathology*; D006801:Humans; D008297:Male; D008592:Menisci, Tibial; D008875:Middle Aged; D009366:Neoplasm Seeding; D012516:Osteosarcoma / Q000556:secondary*; D010329:Patella; D012983:Soft Tissue Neoplasms / Q000556:secondary*