Evidence of an amnesia-like cued-recall memory impairment in nondementing idiopathic Parkinson's disease.

Medicated, non-dementing mild-to-moderate Parkinson's disease (PD) patients usually show recall/recollection impairments but have only occasionally shown familiarity impairments. We aimed to assess two explanations of this pattern of impairment. Recollection typically improves when effortful planning of encoding and retrieval processing is engaged.

Pediatric extraskeletal osteosarcoma.

Extraskeletal osteosarcoma (ESOS) is a rare malignant tumor composed of mesenchymal cells comprising approximately 1% of soft-tissue sarcomas and 4% of all osteosarcomas. Primary osseous osteosarcomas more commonly develop in children and adolescents, but there are very few reports of ESOS occurring in those younger than 40 years. These variants of high-grade osteosarcoma are often characterized histopathologically by the production of an osteoid matrix and bone from malignant osteoblasts that by definition are present in the soft tissue outside the normal skeletal anatomy.