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Biomedical subjects

R Greiner

Publications and source records attributed to R Greiner.

At least 91 records · Page 5Linked to original sources
PubMed1980

[Ovarian carcinoma: new prognostic and therapeutic viewpoints].

Some recently developed concepts concerning the management of ovarian cancer are discussed. Cytoreductive surgery to debulk the tumor to a minimum, even in those cases which were considered inoperable in the past, improves the chances for cure. Adjuvant radiotherapy or combination chemotherapy with new drugs have proved highly effective in inducing complete remission and potential cures in these patients. The definition and better understanding of prognostic criteria play a primary role in the selection of treatment. In designing the strategy for adequate treatment, the following points are of major importance: (1) exact definition of tumor spread as determined by accurate surgical staging; (2) histologic and cytologic grading; and (3) evaluation of response.

Alkylating Agents↗
PubMed1979

[Prognostic criteria and clinical prerequisites of curative therapy of esophageal cancer by radiotherapy alone (author's transl)].

Survey of 289 patients with squamous cell carcinoma of the esophagus treated solely by irradiation between 1961 and 1973. All patients fit for radiotherapy -- uniformly without further selection -- received a local dose of at least 6500 rads. This resulted in a 18% one year survival rate; only one patient lived more than five years. All patients were compared using different criteria to correlate the initial findings at the time of diagnosis with the type of therapy and the prognosis. Three treatment plans were established according to the initial clinical findings: a) palliative therapy, b) locally curative therapy and c) radical curative therapy. The treatment plan which seems to show the best results consists of preoperative irradiation with adjuvant chemotherapy followed by surgical removal of the tumor. This plan should be pursued in all appropriate patients.

Adult↗
PubMed1978

[The value of radiotherapy in the treatment of lip neoplasms].

About 80% of carcinomatous lesions of the lip are smaller than 2 cm in diameter, have little tendency to infiltrate, grow in the lower lip, are histologically well differentiated and do not have, or develop later, regional metastases. Of these carcinomas 95% are cured by the various methods of radiotherapy. The criteria for a more serious prognosis, such as expansive growth, deeper infiltration, location on the upper lip and/or the commissures, undifferentiated grading and regional lymphatic metastases, are found only in a minority of patients with carcinoma of the lip. However, even for tumors of the T3 category rates of cure of over 90% are reported, as confirmed by our own results with supervoltage irradiation with fast electrons of the betatron during the years 1961-1970. The techniques and indications of interstitial Curietherapy with iridium-192 wires are described. The treatment of primary lymphnode metastases, which should be confirmed histologically or cytologically before therapy, is described in detail. Neck dissection is superior to irradiation therapy. General elective neck dissection, as normally performed for carcinoma of the oral cavity, is not justified because of the low rate of metastases and the results of elective therapy. A case report demonstrates the poor prognosis in patients with regional fixed metastases.

Hair Removal↗
PubMed1978

[Lymph node metastases and ureteral obstructions as prognostic parameters for the percutaneous radiotherapy of the bladder carcinoma (author's transl)].

The results of a percutaneous radiotherapy of 136 patients with bladder carcinomas who were treated between 1966 and 1972 are presented in a retrospective study. Before the beginning of the treatment, the diagnosis of these patients had been verified by a lympho-cavo-urography. 21% of the patients had a pathological lymphogram and 40% a pathological urogram. The survival time of patients with normal and those with pathological lympho-cavo-urography showed a difference which was statistically significant (p less than 0.001). There was no patient with inhibited urinary defluxion and demonstrated lymph node metastases who lived longer than 21 months after the treatment. Exclusive percutaneous radiotherapy and primary total cystectomy cannot be considered as curative therapeutic methods. If metastases in the lymph nodes of the regio iliaca communis and paraaortal are demonstrated by lymphography, the prognosis is unfavourable and only palliative methods are justified.

Humans↗
PubMed1977

[Fertility of semi-castrated and irradiated patients with testicular tumors].

The fertility of 62 patients has been followed up by spermatographic analysis. The patients had had malignant testicular tumors treated by semicastration and postoperative X-irradiation between 1957 and 1975. Only 52 patients produced utilizable ejaculates, and these were divided into 8 groups according to the X-ray field arrangement employed. In this way a direct correlation could be established between the field arrangement (viz. field magnitude and gonad load) and the ejaculate findings. From the results it is concluded that azoo- and oligospermia are not a hormonal change induced by the tumor but rather the consequence of X-ray damage of the spermatophores. Azoo- and oligospermia are dependent on the X-ray load on the remaining testis and on the time which has elapsed since the terminaination of treatment. About 15-20% intact fertility can still be found in these patients.

Adolescent↗
PubMed1977

[Reversible and irreversible azoospermia after irradiation of the malign tumor of the testicle (author's transl)].

Of the patients who had received radiotherapy for malignant testicular tumors between May 1957 and December 1975, 100 were alive without recurrence and without previous chemotherapy at the time of this study. An evaluable ejaculate could be examined in 52 of these patients. The patients were divided into eight groups according to the radiation fields employed. In this manner a direct correlation between the radiation field distribution, which determined the field size, and the development of azoospermia could be made. The appearance of azoospermia was also temporally related to the onset of radiotherapy. This is not the result of a tumor induced hormonal alteration. It is caused by destruction of the spermatogonia, the precursor cells of spermatozoa, and a resulting failure of spermatogenesis. This azoospermia is dependent on the irradiation received by the healthy testicle and may therefore be partially or totaly reversible or irreversible.

Adolescent↗
PubMed1976

Importance of the autocontrol crossmatch in human renal transplantation.

The killing of donor cells in the standard lymphocyte crossmatch is considered strong evidence for preformed antibodies in the recipients's serum. Moreover, it is generally accepted that presensitization has occurred if any of the stored sera kill the donor cells. In our hands, if either the current or the stored sera kill the donor cells, it precludes transplantation. In nine cases we discovered that the recipient's sera also killed the recipient's own lymphocytes, a positive autocontrol test, indicating that factors other than conventional preformed cytotoxic antibodies were responsible for the positive standard crossmatch. The nine patients who demonstrated a positive standard crossmatch and a positive autocontrol for those sera received cadaver allografts. None of the kidneys were rejected hyperacutely and all are functioning adequately. We conclude that the autocontrol crossmatch is an important adjunct for uncovering false positive reactions in the standard lymphocyte crossmatch test.

Adolescent↗