[Malacoplakia of the seminal vesicles. Case report and particularities].

OBJECTIVE: Malacoplakia is a rare chronic granulomatous disorder that mostly affects the urogenital system. This article describes a case of uncommon location of this disease at the level of the seminal vesicles and the clinical, imaging and histological particularities of this medical entity. METHOD: We report the case of a 69 year-old male consulting for constitutional syndrome that presented a pelvic tumor on the image studies, possibly arising in the seminal vesicles. RESULTS: The diagnosis was made after performing transrectal ultrasound and seminal vesicles biopsy by the pathognomonic histological findings of Michaelis Gutmann bodies. The presence of E. Coli in urine culture in our patient justified the use of a long-term antibiotic therapy such as quinolones with very good results. CONCLUSION: Malacoplakia of the seminal vesicles is an extremely rare condition, sometimes with non-specific clinical presentation. Its diagnosis is histological and it has good response to prolonged antibiotic therapy with a benign outcome.

[Post-traumatic renal arteriovenous fistula. Conservative treatment with superselective embolization]. / Fístula arterio venosa renal postraumática. Tratamiento conservador con embolización supraselectiva.

OBJECTIVE: Renal arterial-venous fistula is a low incidence clinical entity generally secondary to processes invasive to such organ. We report a new case with a bibliographic review, and evaluate the diagnostic and therapeutic approach. METHODS/RESULTS: We report the case of a patient who suffered a left flank knife wound and developed an arterial-venous fistula presenting with hematuria that was solved by selective embolization. CONCLUSIONS: Arterial-venous fistula is a low incidence entity, usually secondary to renal trauma (open or blunt) and invasive processes. Renal Doppler-Ultrasound is the initial diagnostic procedure when its diagnosis is strongly suspected and then angiography is both confirmatory and therapeutic.

[Extracorporeal shock-wave lithotripsy as treatment of lithiasis in horseshoe kidney]. / Litotricia extracorpórea por ondas de choque como tratamiento de la litiasis en riñones en herradura.

OBJECTIVES: Horseshoe kidney is the most frequent renal congenital anomaly, with an estimated general population prevalence of 1/400-500. This entity may be asymptomatic for the entire lifetime, or produce symptoms from associated complications such as lithiasis, hydronephrosis, or recurrent infections. The incidence of lithiasis varies between 20% and 80% of the patients. The treatment of lithiasis in this entity is controversial due to problems derived from the anatomy of the kidney and its drainage when stones are treated with external shock wave lithotripsy (ESWL). We tried to evaluate the efficacy of ESWL treatment and to establish the ideal conditions in which this technique may be considered treatment of choice. METHODS & RESULTS: A total of 25 patients were evaluated (17 males and 8 females). Patient age ranged from 8 to 75 year old. Three patients presented with bilateral lithiasis. 27 renal units were treated, 18 of which were left (66.7%) and 7 right. Stone size was measured in cm2 of surface. Lithiasis was located at the renal pelvis in 13 cases (48.1%), and lower calyx in 7 (25.9%). Four patients required JJ stent insertion. Mean number of shock waves per session was 3480 (range 1000-4000). Two Shock wave generators were used for treatment, the Dornier lithotripter S and the Dornier MFL-5000, with a range of 10-120 KV for the first one and 14-23 KV for the second. Follow up KUB X-rays were performed at 3, 6 and 12 months to evaluate fragmentation and elimination rates. In our series total fragmentation was 85.2%, and partial fragmentation (fragments > 6 mm) 14.8%. Elimination rates were satisfactory with 37.4% total elimination, and 48.1% partial elimination (Fragments < 6 mm). 14.8% of the patients had no elimination at all. CONCLUSIONS: We consider ESWL the first therapeutic option for cases of lithiasis with a mean area 4 cm2 or less and pelvic location. In case of great lithiasic areas other therapeutic options should be considered (open surgery or percutaneous nephrolithotomy) either in monotherapy or complementary to ESWL.

[Treatment of childhood lithiasis using extracorporeal shock wave lithotripsy]. / Tratamiento de litiasis infantil mediante litotricia extracorpórea por ondas de choque.

OBJECTIVES: We evaluated the efficiency of extracorporeal shock wave lithotripsy (ESWL) in the treatment of pediatric urolithiasis, analyzing results and complications in our series. METHODS/RESULTS: 20 patients (16 males and 4 females) with ages from 2 to 17 years were evaluated. Twelve patients presented left side lithiasis (60%). The size of the stone was measured in cm2 areas. 6 cases (30%) presented with lower calyx stones and 5 cases (25.9%) with stones in the pelvic ureter. 2 patients required JJ catheter insertion. Mean number of shock waves per session was 2,650 (range: 1,000-3,800). The Dornier Lithotripter S and Dornier MFL-5000 lithotripsy machines were used in the range of 10-120 Kv and 14-23 Kv respectively. Follow-up evaluation was performed at one week and three months from treatment, including abdomen x-ray to obtain fragmentation and elimination percentages. In our series total fragmentation was achieved in 100% of the cases, without any patient with partial fragmentation (fragments > 5 mm). Elimination percentages were satisfactory, with a 65% total elimination and 30% partial elimination (residual fragments < 5 mm) within one week. One patient had no elimination at all. CONCLUSIONS: After the results obtained in our series, we consider external shock wave lithotripsy the first treatment option in cases of pediatric urolithiasis.