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Biomedical subjects

E Mukamel

Publications and source records attributed to E Mukamel.

At least 55 records · Page 3Linked to original sources

Metastatic carcinoma to penis: when is total penectomy indicated?

We report on 7 patients with metastatic carcinoma to the penis: 3 had carcinoma of the prostate and 2 had transitional cell carcinoma of the bladder; renal cell carcinoma and squamous cell carcinoma of the rectum were found in 1 patient each. Five patients died within six months; 2 patients are alive three and seven months following diagnosis. One of these patients underwent total penectomy for intractable penile pain. The indications and outcome of this surgical procedure are presented and discussed.

Aged↗

Cytological grading of prostatic aspiration biopsy: a comparison with the Gleason grading system.

Cytological grade determined by fine needle aspiration of the prostate was compared to histological grade in 30 patients undergoing subsequent radical prostatectomy. The degree of cytological pleomorphism determined by the consensus grade of 3 observers predicted correctly the Gleason grade sum range in 80 per cent of the cases. The cytological grade was reasonably reproducible with agreement among all 3 observers in 50 per cent of the cases and between 2 of 3 observers in the remainder. The accuracy of predicting the Gleason grade sum of the radical prostatectomy specimen by cytological examination compared favorably with that achieved by histological examination of cutting needle biopsy and transurethral resection specimens reported in the literature.

Adenocarcinoma↗

Early versus delayed lymph-node dissection versus no lymph-node dissection in carcinoma of the penis.

Assessment of the inguinal lymph nodes for metastases in patients with penile cancer is inaccurate. About 50 per cent of patients with node enlargement have no tumor on histologic examination, and 20 per cent of patients with clinically negative nodes have micrometastases. Lymph-node biopsies, including sentinel-node biopsy, are of limited staging value. Patients with lesions that do not invade the corpora and who have no palpable nodes should be followed carefully after excision of the primary tumor at 2- to 3-month intervals. If compliance with such a follow-up is doubtful, bilateral superficial groin-node dissection seems appropriate. Those with persistent adenopathy should undergo superficial lymph-node dissection first, and if positive nodes are found, bilateral deep-node dissection should then be performed. Bilateral inguinal and pelvic lymphadenectomy is recommended for patients with lesions invading the corpora with clinically negative or positive nodes because of the high incidence of lymph-node metastases in such cases. Where adenopathy persists after excision of the primary tumor, we advocate first limited pelvic dissection. If the pelvic nodes are negative or are not extensively involved, bilateral groin dissection should be performed, preferably in two stages. Percutaneous fine-needle aspiration of palpable or nonpalpable nodes can improve preoperative staging in patients with penile cancer.

Humans↗

The value of Rowatinex in the treatment of ureterolithiasis.

A randomized, double-blind study was carried out on forty patients with acute renal colic in order to evaluate the efficacy of Rowatinex in the treatment of patients with ureteric stones. Patients were randomized to Rowatinex and placebo tablets. In the Rowatinex-treated patients there was a significantly higher rate of expulsion of stones which were greater than or equal to 3 mm in diameter when compared with the placebo group (61% vs. 28%, respectively). A higher success rate (spontaneous stone expulsion and/or disappearance of dilatation of the collecting system on IVU) was noted in the Rowatinex group when compared to the placebo group (78% vs. 52%, respectively), although this was not statistically significant. No significant side effects were noted during the treatment with Rowatinex.

Cholagogues and Choleretics↗

Identification and therapy of stage B prostate carcinoma.

We identify Stage B1 lesions using a combination of clinical and pathologic criteria. Only patients with normal acid phosphatase, chest x-ray and radioisotope bone scan are considered surgical candidates. Patients with a palpable nodule confined to the prostate gland undergo biopsy of the nodule and the contralateral lobe. Our preference is to use the fine needle aspiration which is as accurate as the large needle biopsy, and is associated with less morbidity. Furthermore, local reaction and scarring is less following the fine needle aspiration, making the surgical procedure less difficult. According to the pathologic findings, the tumor is assigned either Stage B1 or B2. The delineation of the size and extent of the tumor is best determined by the digital rectal examination, though the inaccuracy, as shown above, will be directly related to the size of the tumor, the grade of the tumor, and prior therapy. Examination of the prostate under anesthesia has not improved our staging accuracy. CT scan is relied upon mainly to assess the status of the pelvic lymph nodes, and enlarged, suspicious lymph nodes are biopsied by fine needle aspiration. Obviously, only patients with normal acid phosphatase and normal bone scans are considered for surgical therapy. In spite of the inaccuracy of the current staging methods, the probability of tumor-free survival of patients with clinical Stage B tumors is extremely high after radical prostatectomy. Many patients with capsular and seminal vesicle extension remain free of tumor after long-term follow-up (Zincke et al., 1982). Therefore, even within the limitations of our current staging methods, the results of radical prostatectomy for Stage B carcinoma remain excellent, and staging inaccuracy should not deter an attempt at surgical cure.

Humans↗

The value of computerized tomography scan and magnetic resonance imaging in staging prostatic carcinoma: comparison with the clinical and histological staging.

In 21 patients adenocarcinoma of the prostate was staged preoperatively by digital rectal examination, computerized tomography and magnetic resonance imaging. Clinical staging was compared to the postoperative pathological staging. In 11 patients computerized tomography, magnetic resonance imaging and digital rectal examination findings were concordant with the histological examination showing tumors confined to the prostate. In 10 patients no correlation between preoperative staging and histology was noted. Of these cases 8 were understaged by computerized tomography, magnetic resonance imaging and digital rectal examination. In 1 patient magnetic resonance imaging showed false positive findings and in another staging with computerized tomography and magnetic resonance imaging was more accurate than digital rectal examination. Our experience indicates that computerized tomography and magnetic resonance imaging have limited value in the preoperative staging of prostatic carcinoma. Moreover, staging with computerized tomography and magnetic resonance imaging does not significantly improve the information gained by digital rectal examination.

Biopsy↗

Alum irrigation for severe bladder hemorrhage.

We report 5 cases of severe bladder hemorrhage treated with alum irrigation. The severe hemorrhage stopped in all patients after 12 to 48 hours of irrigation. No toxic side effects were noted in all 5 patients, including 1 in whom intra-abdominal spillage of the solution occurred after spontaneous rupture of the bladder.

Aged↗

A mouse ear reaction for assessment of human lymphocyte immunocompetence.

A mouse ear reaction for testing cell mediated immunity of human lymphocytes using the local graft-versus-host reaction assay is described. Five million human mononuclears were locally injected into the ears of immune suppressed NZW mice. The reaction mounted was quantitated by determining the 125I-Iodo-Deoxyuridine (125I-UdR) incorporation in both ears. The ratio of 125I-UdR incorporation, of the injected to that of the non-injected ear (GVHR index), 7 days after lymphocyte injection, served as an accurate measure for the extent of the reaction. Only normal human mononuclears and purified, separated normal human T lymphocytes mounted a local graft-versus-host reaction. Whereas normal human B lymphocytes, chronic lymphatic leukemia B lymphocytes, mononuclears from patients with transitional cell carcinoma of the bladder, irradiated normal human mononuclears, mouse syngeneic mononuclears, or human erythrocytes gave no positive reaction. These experiments demonstrate that this assay can be used to quantitate an in-vivo specific graft-versus-host reaction.

Animals↗

Upper tract tumours in patients with vesico-ureteral reflux and recurrent bladder tumours.

27 patients with recurrent low-grade, low-stage transitional cell carcinoma (TCC) of the bladder and uni- or bilateral vesico-ureteral reflux were followed for up to 18 years in order to study a possible higher incidence of TCC of the upper tract. None of the patients developed tumours of the upper collecting system during the follow-up period. Routine bladder instillations with Thiotepa may be one explanation of such a finding.

Aged↗

Carcinoma of the prostate in Israel: some epidemiological and therapeutic considerations.

Analysis of the different rate of prostatic cancer in Israel among Jews from various countries of origin reveals some very interesting and marked varieties in incidence, which are studied more closely now. Aggressive, combined treatment for the invasive cases of prostatic cancer has been used since 1975. This was based on orchiectomy, DES, and chemotherapy for the stage D2 disease, and on radiotherapy and hormonal therapy for the stage C, and possibly also the stage D1 disease. Results so far have been very encouraging indeed, and with considerably better results than obtained with the individual, more conventional forms of therapy. Five-year survival in the stage D2 disease has been 63.5%, and 87.6% in the stage C (+D1?) disease. It appears that this approach is more justified, certainly in the advanced stages of this disease.

Aged↗

Steroid receptors in renal cell carcinoma: relevance to hormonal therapy.

The relevance of the presence of steroid receptors in the response to hormonal therapy was examined in 19 patients with renal cell carcinoma who were treated by surgery and progestins. Estrogen and progesterone receptors were determined in tissue samples obtained from the tumors, and normal (autologous) and control kidneys. The tumoral tissues had the lowest content of estrogen and progesterone receptors, and the lowest percentage of samples positive for receptor. Autologous kidneys had a higher percentage of positive estrogen and progesterone receptors compared to tumoral tissues, and a lower estrogen receptor content compared to control kidneys. The 18-month survival rate under progesterone therapy for 9 patients with stages I and II tumor was 86 per cent and for 10 with stage IV tumor it was 8 per cent. The low content of progesterone and estrogen receptors in patients with renal cell carcinoma may explain the poor response rate of these patients to hormonal therapy.

Adenocarcinoma↗

Unusual clinical presentation of metastatic prostatic carcinoma in elderly patients.

Three elderly patients with unusual symptoms of metastatic prostatic carcinoma are presented. The first patient suffered from recurrent acute renal failure, the second presented with induration of penis, and in the third patient an acute onset of paraparesis was the presenting symptom of prostatic cancer. The incidence of such symptoms is reviewed and the importance of early diagnosis and therapy is discussed.

Acute Kidney Injury↗

Combined external radiotherapy and hormonal therapy for localized carcinoma of the prostate.

Forty-nine patients with localized carcinoma of the prostate were treated by external radiotherapy together with hormonal manipulation and were followed up to six years. Hormonal manipulation included bilateral orchiectomy and diethylstilbestrol, 3 mg/day. The cumulative five-year survival for the 49 patients was 87.6%, with 11% progression rate to stage D during that period. In 40 patients (81.6%), a decrease in the size of the prostate was noted. In none of the patients was there local recurrence of the tumor during the period of follow-up. Transient gastrointestinal and/or urinary symptoms occurred following radiotherapy in 11 patients (22.4%), and in four patients severe cystitis or proctitis appeared. Complications related to hormonal therapy occurred in 11 patients (22.4%). The high survival rates reported herein, together with the low progression rate to stage D during six years of follow-up, may justify the early institution of radiotherapy in combination with hormonal manipulation for patients with localized carcinoma of the prostate. A randomized study with an extended number of patients is underway to further evaluate this mode of therapy.

Aged↗

Early combined hormonal and chemotherapy for metastatic prostatic carcinoma.

Twenty-four patients with confirmed Stage D carcinoma of the prostate were treated with a combination of bilateral orchiectomy, estrogens (diethylstilbestrol) and chemotherapy (5-fluorouracil), and cyclophosphamide soon after diagnosis was established. Patients were followed up between forty-two to seventy-two months. Seventy-five per cent of patients reported relief of bone pain after initiation of therapy, and 83.3 per cent reported relief of their urinary symptoms. The primary tumor shrank in all patients, and initial stabilization or partial disappearance of osteoblastic lesions on bone scans was noted in 79.1 per cent of patients. The cumulative survival rates at five and six years were 63.48 and 50.78 per cent, respectively. The combined therapy was well tolerated by the patients, and complications were not severe and of a transient nature.

Aged↗

Prostatic transitional cell carcinoma: concept of its pathogenesis and classification.

An updated comprehensive classification of transitional cell carcinoma (TCC) of the prostate is presented in accordance with the current nomenclature, which is based mainly on the theory of multifocal origin of urothelial neoplasms. TCC of the prostate is classified as being primary, secondary (synchronous and metachronous) or mixed (TCC associated with adenocarcinoma). The case histories of six patients with TCC of the prostate are presented. One patient had primary TCC of the prostate without evidence of urothelial carcinoma elsewhere; one patient had primary mixed TCC associated with separate foci of adenocarcinoma; and four patients had secondary TCC either synchronously or metachronously with foci of carcinoma elsewhere in the urothelium. The importance of considering TCC of the prostate as a well-defined clinicopathological entity is discussed.

Aged↗

Nonpapillary lesions of the urinary bladder: a retrospective study.

The histological and clinical features of nonpapillary bladder lesions in 53 patients are described. There were 8 patients (Group A) with atypical hyperplasia and/or carcinoma in situ, 16 patients (Group B) with nonpapillary invasive transitional cell carcinoma, and 29 patients (Group C) with nonpapillary bladder lesions and synchronous or metachronous papillary tumors. These lesions were usually represented clinically by irritative urinary symptoms, such as frequency, urgency, dysuria and hematuria. In 34 of the 53 patients (64.1%), bladder lesions were invisible, i.e., not seen on cystoscopic examinations, and were diagnosed by histological examination of random biopsy specimens or by cytological examination of the urine. The 5-yr survival rates for Groups A, B and C patients were 100, 30.2 and 80.9%, respectively, while the disease progression rate during the same period of time was 72.6, 69.8 and 26.8%, respectively. The significance of the invisible flat lesions of the bladder that are considered to give rise to most types of invasive metastasizing tumors is reviewed and discussed.

Adult↗