From testicular biopsy to human embryo.

The aim of the study was to investigate the role of a testicular biopsy in the diagnosis and therapy of infertile men with a non-obstructive azoospermia. Overall, 70 testicular biopsies from infertile men were analysed. Samples were obtained by the "open testicular biopsy" method. After dissection, several pieces of the tissue were immediately immersed into the Sperm Prep Medium (Medi-Cult) and fixative (5.5% buffered glutaraldehyde). Tissue samples transported in Sperm Prep Medium were plunged into Sperm Freezing Medium (Medi-Cult) and were stored in liquid nitrogen for potential in vitro fertilization procedures. The tissue was also processed for semithin sections and transmission electron microscopy. Semithin sections from 8 infertile patients demonstrated regular testis structure and fully preserved spermatogenesis (control biopsies). In the remaining 62 cases, spermatogenesis was impaired and a variety of pathological changes could be seen: disorganization and desquamation of spermatogenic cells, spermatid or spermatocyte "stop", spermatogonia only, "Sertoli cells only" or tubular fibrosis. However, in 65% of cases (despite the above mentioned changes of seminiferous epithelium) foci of preserved spermatogenesis could be detected. These cases were classified as "mixed atrophy" of seminiferous tubules. In 63% of infertile patients, a successful extraction of sperm from the biopsy could be performed. In azoospermic patients, histological analysis of testicular biopsy proved to be very useful in terms of diagnosis as well as therapy, i.e. for further in vitro fertilization procedures.

Comparative analysis of azithromycin and clarithromycin efficacy and tolerability in the treatment of chronic prostatitis caused by Chlamydia trachomatis.

A total of 123 patients, older than 18 years of age, with symptoms of chronic prostatitis and inflammatory findings as well as the presence of Chlamydia trachomatis confirmed by DNA/RNA DIGENE hybridization method in expressed prostatic secretion or in voided bladder urine collected immediately after prostatic massage, were examined. The patients were randomized to receive a total of 4.5 g of azithromycin for 3 weeks, given as a 3-day therapy of 1 x 500 mg weekly or clarithromycin 500 mg b.i.d. for 15 days. Patients' sexual partners were treated at the same time. Clinical and bacteriological efficacy were evaluated 4-6 weeks after the end of therapy. In the group of patients with chronic chlamydial prostatitis the eradication rates (azithromycin 37/46, clarithromycin 36/45) and the clinical cure rates (azithromycin 32/46, clarithromycin 32/45) were not significantly different with regards to the administered drug (p > 0.05). In the group of patients with asymptomatic chlamydial prostatitis the eradication rates (azithromycin 11/16, clarithromycin 10/15) were not significantly different with regards to the administered drug (p = 1.00, OR = 1.1).

Effects of various cryopreservation media and freezing-thawing on the morphology of rat testicular biopsies.

Currently, testicular sperm extraction is successfully combined with intracytoplasmic sperm injection into the oocyte (ICSI). Several pieces of a testicular biopsy can be frozen and thawed until the ICSI attempt. In this study, the effects of freezing-thawing on the morphology of rat testicular biopsies stored in different cryopreservation media were analysed. Each cryopreservation medium contained glycerol and/or dimethyl sulfoxide (DMSO) as cryoprotectants. In general, both glycerol and DMSO, when applied at moderate concentrations (6-25%), preserved the structure of the seminiferous epithelium. The freezing-thawing procedure had no significant effect on tubular diameter; however, it caused a 'folding' of the lamina propria and notable damage to Sertoli cells, spermatogonia and spermatocytes. Round and elongated spermatids and spermatozoa displayed occasional nuclear damage, vacuolization, and shrinkage/swelling of the cytoplasm. However, the vast majority of these cells maintained their normal structure in nearly all the applied cryomedia. It is concluded that freezing-thawing of testicular biopsies, and the cryopreservation medium, have a significant impact on the structure of the seminiferous epithelium, particularly on its basal compartment.

Gentamicin concentrations in urine, cortex and medulla in an acutely obstructed kidney animal model.

Gentamicin was administered intraperitoneally, three times in 12 h to Hartley type guinea-pigs which had undergone complete unilateral ureteral obstruction with normal contralateral ureteral function for either 24 hours, 7 days or 21 days. Two hours after the last drug dose urine samples were collected from urinary bladder and obstructed ureter. Healthy and obstructed kidneys were then surgically removed from all sacrificed animals. Gentamicin concentration in urine of healthy kidney was 112-266 microg/ml, and in obstructed kidney 18-53 microg/ml, with a tendency of linear decrease over a 3-week obstruction period. The gentamicin concentration in obstructed renal cortex never exceeded one-third of the gentamicin concentration in unobstructed renal cortex. The maximum gentamicin concentration in obstructed renal medulla was 75% of the gentamicin concentration in unobstructed renal medulla.

Duration of clinical symptoms in female patients with acute urethral syndrome caused by Chlamydia trachomatis treated with azithromycin or doxycycline.

One hundred fifty-one female patients with acute urethral syndrome caused by Chlamydia trachomatis were examined. First, patients were divided into two groups, those with clinical symptoms present < 3 weeks before the start of treatment, and those with clinical symptoms > or = 3 weeks prior to the beginning of therapy. Then patients were further divided into groups and randomized to receive azithromycin once daily in a single dose of 1.0 g or 500 mg once daily for 6 days, or to receive doxycycline 100 mg b.i.d. for 14 days or 100 mg b.i.d. for 7 days (8 study groups in all). Clinical and bacteriological efficacy was evaluated 3 weeks after the end of therapy. In the group of patients with disease symptoms lasting for 3 weeks or longer, the eradication and clinical cure rates were significantly higher after administration of azithromycin in a dose of 1x500 mg/6 days than after a single dose of 1.0 g (p<0.01), and after administration of doxycycline 2x100 mg/14 days than by using doxycycline 2x100 mg/7 days (p<0.05).

[Antimicrobial therapy of urinary tract infections]. / Antimikrobno lijecenje infekcija mokracnog sustava.

Urinary tract infections (UTIs), according to localization of infection, can be subdivided into urethritis, cystitis, prostatitis and pyelonephritis, according to type of infection into symptomatic, asymptomatic, acute (first or single), recurrent, chronic, complicated and uncomplicated. Clinical symptoms of cystitis and leukocyturia are sufficient reason for early initiation of a three-day empirical antimicrobial therapy of acute uncomplicated cystitis in young women. Urine culture should be performed prior to the initiation of antimicrobial therapy in pregnant women, diabetics, recurrent UTIs, in case of unsuccessful prior treatment and in patients with pyelonephritis. All symptomatic UTIs should be treated, as well as asymptomatic bacteriuria in pregnant women, diabetics, preschool children and prior to urologic-gynecologic surgery. In complicated UTIs it is especially important to determine and try to eliminate or at least put under control the factors that complicate UTIs. Antimicrobial therapy of UTIs includes fluoroquinolones, co-trimoxazole, betalactam antibiotics, aminoglycosides and nitrofurantoin, tetracyclines, macrolides, and azalydes in case of sexually transmitted diseases caused by Chlamydia trachomatis and Ureaplasma urealyticum. Cystitis is treated for 1, 3 or 7 days, asymptomatic bacteriuria 3-7 days, uncomplicated pyelonephritis 10-14 days, bacterial prostatitis 4-8 weeks, and chronic nonbacterial prostatitis 2-4 weeks. Recommended therapy for chronic and complicated UTIs is 7-14 days only in relapses and reinfections, and in some patients it can last for several weeks, up to 6 months. Chemoprophylaxis in recurrent uncomplicated UTIs should be employed for at least 6 months.

Azithromycin and doxycycline in the treatment of female patients with acute urethral syndrome caused by Ureaplasma urealyticum: significance of duration of clinical symptoms.

One hundred ninety-two female patients with acute urethral syndrome caused by Ureaplasma urealyticum were examined. First, patients were divided into two groups: those with clinical symptoms present for less than 3 weeks before the start of treatment and those with clinical symptoms 3 weeks or longer before the beginning of therapy. The patients were then further divided into groups and randomized to receive azithromycin once daily in a single dose of 1 g or 500 mg once daily for 6 days, or to receive doxycycline 100 mg b.i.d. for 14 days or 100 mg b.i.d. for 7 days (eight study groups in all). Clinical and bacteriological efficacy were evaluated 3 weeks after the end of therapy. In the group of patients with disease symptoms lasting for 3 weeks or longer, eradication and clinical cure rates were significantly higher after the administration of azithromycin at a dose of 1 x 500 mg/6 days than after a single dose of 1 g (p < 0.001).

Human papillomaviruses are not associated with renal carcinoma.

In an attempt to better understand the troubling issue of renal human papillomavirus (HPV) infection, fresh tumour specimens obtained by surgical extirpation from tumours were compared for the presence of HPV. All of the renal carcinoma samples were examined by PCR using two sets of consensus primers and the specific primer pairs for HPV 16, 18, and 33. None of the 28 carcinomas and 17 corresponding normal tissues were found positive for HPV DNA in any of the applied analyses. Our results suggest that HPV does not play any role in the development of renal carcinoma in the general population.

Urogenital war injuries.

Out of 1,350 war casualties treated at the University Hospital Rebro during the defensive war in Croatia, 60 (4.4%) injuries of the urogenital tract were present. Among these 60 casualties, 51 (85.0%) had multiple injuries, most often abdominal and urogenital. These patients were accordingly treated by combined urological and surgical teams. Regarding injuries, there were 21 kidney injuries, 11 ureter (2 patients had bilateral injuries), 7 urinary bladder, 2 urethral, 15 testicular, and 6 penile injuries subjected to surgical treatment. Nephrectomy was performed in 6/21 patients with kidney injuries. Orchiectomy was performed in 40% of patients with testicular injuries. In the remaining patients with urological tract injuries, surgical reconstruction with organ conservation was performed.

Loss of heterozygosity of the nm23-H1 gene in human renal cell carcinomas.

This study evaluates the potential contribution of the nm23-H1 gene to malignant transformation in patients with renal cell carcinoma. Using specific oligonucleotide primers for the nm23-H1 microsatellite repetitive sequence, gene instability was followed by polymerase chain reaction/loss of heterozygosity assay on 54 tumor specimens and the corresponding normal tissue samples. We also determined, immunohistochemically, the relative concentration and localization of the nm23-H1 protein product. From 77.7% informative cases, DNA from 6 tumors exhibited loss of heterozygosity, regardless of the tumor stage (TNM). Out of 39 samples analyzed, 30 were negative for Nm23-H1 protein, while the others were only slightly positive. No correlation with tumor stage was found. Normal renal tissue was also negative for this protein. Our results provide the evidence for loss of heterozygosity, followed by means of microsatellite tandem-repeat polymorphism, at the nm23-H1 locus in renal cell carcinoma. However, since no correlation was found between the tumor stage or metastatic potential on the one hand, and allelic loss and specific protein expression on the other, it seems that nm23-H1 does not play a key role in the invasiveness of this tumor type.

Urolithiasis in childhood: surgery and lithotripsy.

From 1982 through 1993, 174 interventions in 160 infants and children with urolithiasis were performed at our department. There were 101 boys and 59 girls, mean age 8.9 years. The main causes of the interventions were congenital malformations in 62, followed by recurrent urinary tract infections in 29, previous operations in 17, and hypercalciuria in 35 patients. In 17 children, the cause of urolithiasis remained unknown. As a therapeutic option, extracorporeal shock-wave lithotripsy (ESWL) has become available since 1988. The malformations and postoperative conditions are surgically corrected, and the calculi removed in the same act. For post-infectious, idiopathic or hypercalciuric calculi, ESWL has been used in the majority of patients since 1988. Thus, a total of 129 calculi were removed by operation and 47 by ESWL, whereas 18 calculi were endoscopically extracted. There were no complications after either ESWL or open surgery. Calculi in congenital malformations or as a result of operation are still removed by open surgery. In other cases, ESWL is the method of choice.

Antibodies to Tamm-Horsfall protein in patients treated with extracorporeal shock wave lithotripsy (ESWL).

The aim of this study was to determine antibodies to Tamm-Horsfall protein in patients with nephrolithiasis treated with extracorporeal shock wave lithotripsy (ESWL). The values of antibodies to Tamm-Horsfall protein were determined by direct enzyme immunoassay. No statistically significant differences (P > 0.05) were observed for the IgG and IgM classes of antibodies between the groups of healthy subjects and patients with nephrolithiasis before, and 30 and 60 days after ESWL. The values of IgA class determined 30 days after treatment were significantly higher (P < 0.05) in patients, which could be due to the stimulation of the immune system. The highest values of antibodies to Tamm-Horsfall protein were obtained in both groups in the test with secondary antibodies directed toward IgM class, implicated at the presence of cross-reactive antibodies. Determination of antibodies to THP subunits isolated form urine of patients with nephrolithiasis should be performed.

Testicular trauma sustained during football.

Three patients having testicle injury received while playing football are reported. Two of them received a blow with a ball. Surgical findings revealed spermatic cord injury with scrotal haemorrhage in one patient, and intratesticular hematoma in another one. After hematoma evacuation and arrest of haemorrhage achieved by ligature, the testicle appeared normal. In the third case with testicle rupture after scrotal kick, early exploration finished with adequate debridement and approximation of the tunica albuginea laceration. Postoperative ultrasonography showed a homogeneous echo pattern of the remaining two-thirds of the parenchyma.