We describe the treatment of an uncommonly late presentation of a recurrent parosteal osteosarcoma of the distal femur. The osteosarcoma had originally been detected 20 years earlier, and had been treated with wide excision and mega-prosthesis to reconstruct the femur. The tumour recurred in close proximity to the femur prosthesis and encased half the femoral stem. Because there was a large pie...

  Abstract   Background: Parosteal osteosarcoma is rare low-grade malignancy which arises   on the surface of the metaphysis of long bones it has a low propensity to metastasize.   Different surgical treatment options including marginal resection, wide resection   and amputation were recommended for the tumor. The purpose of the study was to   assess the results of different surgical treatment ...

This study describes the clinical features, radiological appearance, and treatment of 11 new cases of osseous lipoma and reviews 301 other cases in the literature. Osseous lipomas are classified by the site of origin: either within bone (intraosseous lipoma) or on the surface of bone (juxtacortical). Intraosseous lipomas include intramedullary and intracortical lesions. Surface lipomas include ...

A functional analysis suggested that the bizarre speech of an individual with developmental disabilities was maintained by attention. The content of verbal attention was manipulated in two subsequent analyses and revealed that (a) bizarre speech was more frequent when attention was related to the participant's bizarre speech and (b) the participant's statements tended to reflect the content of ...