PubMed Health⌕ Search

Biomedical subjects

R A Marcial-Rojas

Publications and source records attributed to R A Marcial-Rojas.

9 recordsLinked to original sources
PubMed1990

Bone tumors of mixed origin: osteo-liposarcoma and osteo-rhabdomyosarcoma.

1. A complete perusal of the literature revealed twenty cases of primary liposarcoma of bone acceptable as such to the authors. These were tabulated as to location and age. 2. Eight cases of osteo-liposarcoma, primary in bone, were encountered in the literature and an additional case was reported by the authors. 3. The authors described for the first time in the literature a new primary tumor of bone of mixed origin: osteo-rhabdomyosarcoma. After careful perusal of the literature they added three additional cases: two cases, previously reported as primary rhabdomyosarcoma of bone, which on careful evaluation of the radiographs in said publications and the paucity of microphotographs they considered to be osteo-rhabdomyosarcomas, and the other case, previously reported as malignant mesenchymoma of the sternum following radiotherapy for breast cancer. 4. The authors prefer to classify these tumors (osteo-liposarcoma and osteo-rhabdomyosarcoma) as "Tumors of Mixed Origin" and not as "Malignant Mesenchymomas". 5. A complete review of the literature revealed 219 reported "dedifferentiated" chondrosarcomas, or chondrosarcomas "with additional mesenchymal component", among which only nine (9) contained a bona fide rhabdomyosarcomatous component. The rest exhibited other mesenchymal tumors as osteogenic sarcoma, fibrosarcoma, malignant fibrous histiocytoma, angiosarcoma, and undifferentiated sarcoma. The authors recommend to continue classifying these tumors as chondrosarcomas with additional mesenchymal component or even as "dedifferentiated" chondrosarcomas but not as malignant mesenchymomas.

Adolescent↗
PubMed1990

Extraskeletal chondromas.

1. Extraskeletal chondromas occur in three variants: (a) as multiple nodules of synovial chondromatosis within a joint, (b) as a solitary lesion in association with articulations, within or adjacent to them, and (c) as an isolated cartilagenous lesion in the soft tissues, mostly of the hands and feet. 2. There are no histological characteristics which could differentiate articular, para-articular and soft tissue chondromas among themselves. 3. The latter two groups of extraskeletal chondromas are rare and frequently exhibit areas of immature cartilage with worrisome histologic features which could mislead the pathologist to an overdiagnosis of chondrosarcoma. 4. As a general rule, no matter how worrisome the histologic appearance of an extraskeletal, well delimited cartilagenous tumor may be, metastasis have not been recorded. Local recurrences are not infrequent after inadequate surgical removal; however, the tumor can always be controlled by adequate wide re-exision or resection. 5. Two cases of extraskeletal chondromas, one para-articular in the knee and the other in the soft tissue of the arm, have been presented with an exhaustive review of the literature on the subject. 6. It is of interest to note that our para-articular chondroma represents the first case reported in the literature where computerized tomography was utilized in the diagnosis. 7. The location of a soft tissue chondroma in the upper arm is extremely rare and only one previous case has been reported in said location.

Adult↗
PubMed1990

Desmoplastic fibroma of bone: report of one case and review of the literature.

A case of a primary desmoplastic fibroma of bone has been presented with a complete review of the world's literature on the subject. Our case represents the one hundred and twenty seventh case (127th) reported. The usual aggressive local growth and the classical radiological and histological characteristics are very well depicted in the case. It represents the first case of this tumor of bone reported in Puerto Rico. No recurrence is evident twenty months after wide excision and intercallary bone graft.

Bone Neoplasms↗