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Biomedical subjects

L Schuman

Publications and source records attributed to L Schuman.

33 records · Page 2Linked to original sources

Atypical (dedifferentiated) chondrosarcoma or osteosarcoma with preponderant chondroblastic differentiation?

A bone tumor was detected in the distal right femur of a 15-year-old girl. The age of the patient, the localization, and the X-ray picture were in favor of an osteosarcoma. However, histology was consistent with a "highly differentiated chondrosarcoma with dedifferentiation and focal osteosarcomatous metaplasia". The tumor was resected with preservation of the limb. One year later the tumor recurred, and the leg was exarticulated. Histology was again of the same type, as was the case in a single lung metastasis taken out another half year later. Two series of chemotherapy according to an osteosarcoma protocol had no recognizable effect. An unambiguous diagnosis cannot yet be made.

Adolescent↗

The earlier detection of colorectal cancers: a preliminary report of the results of the Occult Blood Study.

A long-term clinical study is underway to evaluate the merit of occult stool blood testing in the earlier detection of colorectal cancers; 48,000 participants have been enrolled. Thus far, 873 patients with occult stool blood have been examined, and 77 gastrointestinal cancers have been found in 74 patients. Although data from the control group are not yet available for comparison, most of the cancers found appear to be relatively early in their development. Conventional barium-enema examinations were noted to have "missed" one third of the colon cancers and two-thirds of the colon polyps which were found on colonoscopy. Preliminary results of the study appear encouraging. Definitive analysis will await the availability of additional pertinent data.

Barium Sulfate↗

[Surgical interventions on the vertebral bodies of the thoracic spine (author's transl)].

27 operations on the vertebral bodies of the thoracic spine are reported. Indications for operation included markedly progressive infantile and juvenile scoliosis, correction of severe kyphoses in congenital malformation, fractures, Scheuermann's disease and post-laminectomy as well as tuberculous spondylitis and tumors. The two uppermost thoracic vertebrae can be reached by the method of Southwick and Robinson, the two lowest vertebrae from an extraperitoreal-subdiaphragm approach. Thoracotomy was chosen for the remaining thoracic vertebrae. If the staff and material are available, operations on the thoracic vertebrae can be regarded as relatively safe and, in many cases, are the only possibility for obtaining a satisfactory or good result. In spite of this, strict indications must be observed. Severe complications (death, paraplegia etc.) did not occur in any of the patients.

Adolescent↗

Epidemiology of diseases in adult males with leukemia.

In the Tri-State Leukemia Survey, the history of diseases in 605 adult male leukemia cases 15 years and older and in 668 adult male population controls was examined. These diseases occurred at least 1 year before leukemia was diagnosed. The data were based on respondents' answers that the disease was diagnosed by a physician; the respondent was either the subject or his spouse. Of 30 diseases studied, 7 showed an excess among the patients with leukemia: infectious hepatitis, eczema, psoriasis, diabetes, arthritis and rheumatism, heart disease, and ankylosing spondylitis. Mumps had a lower reported occurrence among the cases, whereas pneumonia was less frequent in acute lymphatic cases than in population controls. Three diseases occurred significantly less in controls than in persons with specific histologic types of leukemia. Our data revealed a more frequent history of herpes zoster (shingles) in chronic lymphatic leukemia, more hives in acute chronic myeloid cases, and meningitis in acute myeloid leukemia. When we only considered the patients' responses, more of them admitted having had acne than did our controls. The remaining diseases--childhood viral diseases, infectious mononucleosis, smallpox, typhoid fever, dysentery, scarlet fever, tuberculosis, asthma, hay fever, and goiter did not occur more frequently in cases than in controls. The findings were consistent with evidence from previous laboratory and clinical studies. The increased occurrence of infectious hepatitis in our case series is consistent with the findings of other studies showing an increased frequency of Australia antigen in patients with hepatitis, leukemia, and Down's syndrome.

Adolescent↗

Leukemia and non-Hodgkin's lymphoma and residential proximity to industrial plants.

The risks of developing leukemia and non-Hodgkin's lymphoma from living near industrial facilities were evaluated among men from Iowa and Minnesota in a population-based, case-control study. We found a statistically significant increase in the risk of developing non-Hodgkin's lymphoma (RR = 1.4) and a slight, nonsignificant excess for leukemia (RR = 1.2) among individuals who lived .8-3.2 km (1/2-2 miles) from a factory. Risks were greater for certain histologic types: follicular lymphoma (RR = 1.5), acute lymphocytic leukemia (RR = 5.4), and acute myelocytic leukemia (RR = 2.2). For non-Hodgkin's lymphoma (but not for leukemia), the relative risks for those living within .8 km (1/2 mile) of a factory were similar or slightly larger than for those living .8-3.2 km (1/2-2 miles) from a factory. Risks did not increase with duration of residence near a factory. The elevated risks of non-Hodgkin's lymphoma were particularly associated with residing near stone, clay, or glass industry facilities. The risk of developing leukemia was greater among persons who resided near chemical and petroleum plants. These preliminary findings raise the possibility that general environmental exposure associated with certain industrial activities may elevate the risk of developing leukemia and non-Hodgkin's lymphoma. Evaluation of data on proximity to industrial plants from studies in other geographic locations is needed to determine whether our results represent a meaningful association.

Case-Control Studies↗

Thyroid hormones and duration of ovulatory activity in the etiology of breast cancer.

We conducted the present study with the hypothesis that conflicting reports on the association between mild hypothyroidism and breast cancer may be due to failure to consider the potential interaction between thyroid and ovarian hormones. Seventy-three cases of breast cancer and 75 hospital controls were studied. The overall matched multivariate odds ratio of breast cancer for the lowest tertile of free T4 (< or = 1.10 ng/dl) versus the two other tertiles was 1.7 (95% confidence limits, 0.6-5.0). However, there was a statistically significant linear trend (P = 0.04) in the odds ratios for breast cancer related to subnormal free T4 levels across tertiles of duration of ovulatory activity. These results suggest that women combining low levels of circulating free T4 with long duration of ovulatory activity may be at increased risk for this disease.

Adult↗