Biomedical subjects
Publications and source records attributed to E O Nkposong.
A study was undertaken to determine the changes in the seminal fluid of adult patients presenting with unilateral testicular torsion. There was beneficial effect from excising an infarcted torsive testis and a deleterious effect from retaining it.
An unusual cross relationship of two left renal arteries was demonstrated angiographically during the investigation of a young man presenting with painless, total hematuria after a traffic accident. The upper pole artery arose from the aorta caudal to the lower pole artery. In the absence of a malrotation a possible embryologic cause has been advanced. It also highlights the advantage of combining selective renal arteriography with aortography when multiple renal arteries are encountered.
In a retrospective review of the case notes of 510 infertile men, testicular failure of various types was the aetiologic factor in 61% of cases, chronic epididymitis in 32% and varicocoeles in 25%. Five patients had bilateral absence of the vas deferens. It is hoped that improved health-care delivery will benefit the group of patients with preventable and potentially curable aetiologic factors like varicocoeles, chronic epididymitis and testicular torsion.
Forty-two out of a total of 45 children who presented with priapism in the University College Hospital Ibadan during an eight-year period had associated sickle cell disease (SCD). Conservative management was satisfactory in 35 out of 40 patients, but the outcome in all the five cases subjected to surgery was poor. Our findings suggest that associated SCD should be suspected in children presenting with priapism in areas of the world where SCD is endemic, and that conservative management is preferable to surgery.
A comparison of carcinoma of the prostate gland in a low-incidence Nigerian (Ibadan) population and a high-incidence U.S. Afro-American (Washington, D.C.) population was the purpose for this study, initiated in 1973. The frequency of carcinoma (micro- and invasive) was determined in consecutive necropsy cases from hospitals in Ibadan, Nigeria, Accra, Ghana and Washington, D.C. The results of these clinical, epidemiologic and morphologic studies are reported. Clinically, the peak incidence of carcinoma of the prostate in Nigerian males in Ibadan and in American males in Washington, D.C. was in the 65-74 age group. The median age of patients was 66.4 years in Ibadan and 69.2 years in Washington, D.C. Seventy-five percent of Nigerian and 49% of American patients were in stages III and IV. Overall, the distribution by grade of neoplasms in surgical material from Ibadan and Washington, D.C. was similar. Plasma testosterone and estrone levels were significantly higher (p < 0.05 and p < 0.001) in U.S. patients than in U.S. controls and higher (p < 0.001 and p < 0.05) in U.S. patients than in Nigerian patients with prostatic carcinoma. Plasma testosterone levels were significantly lower (p < 0.05) in Nigerian patients than in Nigerian controls. Estrone levels were not significantly different in Nigerian patients than controls. Nigerian patients were more sexually active throughout their lives than American patients; however, they reported a higher incidence of impotence than U.S. patients in the immediate 5 years preceding the diagnosis of prostatic carcinoma. Nigerian respondents (patients and controls) arrived at puberty later than their American counterparts. Within each of the two population groups, the factor with the highest relative risk ratio was lower urinary tract symtoms occurring 10 years or longer before the onset of the present complaints which led to the diagnosis of prostatic carcinoma. Nigerian and U.S. patients were more sexually active than controls. Microcarcinoma (incidental, latent) of the prostate gland occurred with a frequency of 11.8% and at an age-adjusted incidence rate (world standard) of 40.6 per 1000 necropsies in the sampled U.S. black male population. The age-adjusted incidence rate (world standard) for microcarcinoma in the combined West African (Accra and Ibadan) series (36.7/1000) was almost equal to the rate (40.6/1000) in the Washington, D.C. series.
4 cases of eosinophilic granulomatous cystitis are reported. The clinical presentation of this rare entity is disucssed. It is suggested that the lesion is probably akin to eosinophilic enteritis or eosinophilic granuloma of the gastrointestinal tract and represents a local intense allergic reaction of eosinophilic type. The causative agents are yet to be identified. Management by an allergist is suggested as a first line of treatment as it appears that the bladder lesions are usually too extensive for local resection.
Explore the source record for details and available documents.
Four cases of urogenital rhabdomyosarcoma in Nigerian children are reported. One of the patients is alive and well six years after surgical excision of a stage 1 tumour. The remaining three children had more advanced neoplasms and died soon after surgery despite adjuvant therapy with one or more cytotoxic agents. The probable value of combination chemotherapy with vincristine, actinomycin D and cyclophosphamide in this tumour type is discussed.
A prostatic lesion characterized by atypical epithelial hyperplasia and pleomorphism of the stromal elements is presented. The features bear a strong resemblance to cystosarcoma phyllodes of the female breast and probably represent a comparable lesion. Such atypical hyperplasia has not been described previously.
The pathology of 154 cases of carcinoma of the urinary bladder diagnosed in surgical specimens in Ibadan is reviewed. Schistosoma haematobium-infections are found in association with all varieties of urothelial carcinoma. The majority of tumours in this and previously reported series from bilharzial and nonbilharzial underdeveloped regions presented in advanced stages. It is suggested that the preponderance of squamous cell carcinoma in these regions is a reflection of late clinical presentation. The evidence so far presented to support a causal relationship between schistosomiasis and carcinoma of the bladder is reviewed. It is concluded that such relationship is probably not true.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
This study was designed to compare United States (Washington, DC) black prostatic carcinoma patients (high-risk group) with Nigerian (Ibadan) black prostatic carcinoma patients (low-risk group). Although the material is meager, preliminary analyses suggest that carcinoma of the prostate is a common disease in both US black men (196 of 1000 autopsies) and in Nigerian black men (67 of 1000 autopsies). The tumor tends to be of a higher histologic grade (less well differentiated) and the carcinomatous foci are more numerous in the Nigerian patients. Fifty-three percent of US patients are in stages I and II when the disease is first discovered. Plasma testosterone, estrone, and estradiol concentrations did not differ significantly between US patients and controls. A statistically significant positive association is indicated between carcinoma of the prostate and the following epidemiologic variables: racial admixture, age of puberty, and age of first coitus. The median age of necropsy cases with carcinoma was 50.0 years in Nigeria and 68.3 years in the US.
Semen analysis in 116 subfertile and infertile patients with varicocele revealed oligospermia (counts less than 20 million/ml) in 66% of patients, asthenospermia (motility of less than 50%) in 59% of patients; and teratospermia (abnormal sperm morphology of greater than 50%) in 65% of patients. The sperm motility and morphology deteriorated with decrease in sperm concentration. After varicocelectomy 53% of all patients showed improvement in the overall semen quality. The best post-operative results were noted in patients who had pre-operative counts over 20 million/ml. Deterioration in semen quality was observed in 6% of all patients. Factors which possibly played a role in the response to varicocelectomy in our environment are discussed.