Biomedical subjects
Publications and source records attributed to H Niibe.
563 patients with Stage I and II non-Hodgkin's lymphoma were treated by radiotherapy. 34 recurrences that occurred after 3 years from initial treatment were seen in those patients. 15 (44%) of 34 recurrences occurred after 5 years. 20 patients (59%) had remission by re-treatment, and 13 (38%) survived more than 2 years. 20 (59%) of recurrences were seen on head and neck lesions and superficial lymph nodes.
A total of 234 patients of Hodgkin's disease treated at 7 institutions from 1972 through 1985 were analyzed. Male to female ratio was 157: 77, mean age was 39.8 years, and overall 5- and 10-year survival were 67% and 56%, respectively. Of 126 patients treated by radiotherapy with more than 36 Gy, alone or preceded to other treatments, 5- and 10-year survival rates were 84% and 80% for Stage I (43 patients), 79% and 69% for Stage II (71 pts.), and 52% and none for Stage III (12 pts.), respectively. Survival rate was better for LP, NS and MC histologies as compared to LD, better for patients without constitutional symptoms, as compared to patients with B, and better for patients with ages younger than 59 years as compared to those with ages over 60 years. Relapse was observed in 57 out of 126 patients. Relapse within the irradiation field was observed in only 4, and nodal areas outside the field, especially of abdomen (1/3), were the most common sites. Half of the relapses occurred within 20 months, and 80%, 40 months. Five-year survival of patients after relapse to lower torso lymph nodes (19 patients) was 37%, which was worse than patients after relapse to upper torso lymph nodes (15 patients: 63%) (z = 1.507, N.S.).
Rat glioma model was used to evaluate the effect of hyperthermia with and without radiation therapy. The animal model was induced by left frontal burr hole opening and inoculation of a small piece of G-XII glioma tissue to 6- to 8-week-old rats. The therapeutical experiments were given 10-14 days after inoculation of the tumor. Interstitial heating at 44 and 45 degrees C at the surface of the inserting probe using 2450 MHz microwave was delivered for 30 minutes. Deep X-ray whole head irradiation of 800 R using Stabilipan 2 (Siemens) was given just after the hyperthermia therapy. The survival of treated animals of hyperthermia, radiation, and combination of hyperthermia and radiation was significantly superior to that of non-treated control group. There was no significant difference of survival among the treated groups, though median survival was longest in the group of combination therapy of hyperthermia and radiation. Large tumors developed at the time of death in all the control and the treated animals. Histological examination showed some tendencies of macrophage infiltration in tumor tissue of hyperthermia therapy.
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During the years 1972-81, 168 patients with extranodal Non-Hodgkin's lymphoma localized in the head and neck were treated with radiation. Five-year survival rates were 62% in stage I, 56% in stage II, and 91% in diffuse well-differentiated lymphocytic, 77% in diffuse mixed, 52% in diffuse poorly-differentiated lymphocytic and diffuse histiocytic each. Marginal relapse was rare after radiation therapy, but relapses were not infrequently noticed in distant extranodal sites. Bone and/or soft tissue relapses were frequently noticed in patients with lesions initially located in the nasal cavity, paranasal sinus and oral cavity.
The clinical features of 102 patients with low grade non-Hodgkin's lymphomas treated from 1972 to 1981 among the hospitals belonging to the JLRTG were retrospectively reviewed. According to the Rappaport classification, there were 29 cases of NPDL, 26 of NM and 47 of DWDL. The survival rate and relapse-free survival rate for all patients at 10 years were 49% and 41%, respectively. No obvious difference in survival rate was seen by histologic type, but patients with DWDL had a better relapse-free survival rate than those with NM (P less than 0.01). This study also suggested that patients with stages I and II low grade lymphomas might be treated by irradiation alone, if they are staged properly.
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We have previously reported that Amifostine, a radioprotective agent, was effective in treating acute radiation mucositis in the head and neck region. We found that when a considerable amount of Amifostine accumulates in the salivary glands, it may be useful in preventing chronic disturbances of salivary secretion. We have observed an increase in the uptake of Ga-67-citrate to the salivary glands when they were irradiated. In this paper, the radioprotective effects of Amifostine, in treating chronic radiation injury of the salivary glands, were studied, using the cessation of an increase in uptake of Ga-67-citrate after radiotherapy as the criterion. The subjects were 105 patients, (280 salivary glands in Ga-scintigrams) with malignancy of the head and neck region treated by irradiation from 1978 to 1984. Ga-negative glands were recognized in 97%, that is, 36 out of 37 glands, before irradiation, and the figure decreased to 19%, seven out of 37, within 1 to 2 weeks (10Gy less than or equal to) after the start of radiotherapy. In patients who were irradiated with more than 30 Gy and in whom scintigraphy was performed at 6 months or more after radiotherapy, Ga-negative glands were recognized in 18 out of 41 glands, 44%, with Amifostine, compared with 13%, four out of 32 glands, without Amifostine. A difference was recognized between these two groups in the negative change in Ga-67 uptake after radiotherapy (p less than 0.05). These facts suggest that Amifostine may have a radioprotective effect on chronic radiation injury.
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A 79-year-old man was admitted to our hospital for radiation therapy for lung cancer on July 24, 1984. In the course of radiation therapy, many bullas were recognized on his trunk. The lesion was diagnosed as bullous pemphigoid. To date, about 27 cases of malignant tumor with bullous pemphigoid have been reported in Japan. At present, the causal relation between malignant tumor and bullous pemphigoid has not been establishes. In our case, the bullous lesions disappeared during the course of radiation therapy, and the patient has been in good general condition for nine months without recurrence of metastasis of lung cancer.
The relation between the CT findings and the histopathology of metastatic liver tumors was investigated in nine autopsy cases of liver metastases. In hypervascular and necrotic tumors, large necrotic lesions demonstrated by CT were almost consistent with the pathological findings, but small metastatic nodules were better identified on plain CT than those on contrast-enhanced CT. Postmortem CT examination of the liver obscured metastatic nodules as compared with diagnostic CT. Diffuse liver involvement of lymphoma cannot be identified on CT examination. Plain CT is considered to be useful for screening liver metastases.
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