1/45. Delayed transection of urethra by mersilene tape.This report is of a patient with complete urethral transection after undergoing a mersilene sling urethral suspension. This unusual complication eventually presented as anterior urethral pseudodiverticulum containing the mersilene tape with a secondary calculus.- - - - - - - - - - ranking = 1keywords = calculus (Clic here for more details about this article) |
2/45. Giant calculus in a female urethral diverticulum.Urethral diverticula with calculi are rare. This 5x6 cm calculus presented in a patient with recurrent urinary tract infections. Local excision was effective.- - - - - - - - - - ranking = 5keywords = calculus (Clic here for more details about this article) |
3/45. Bilateral extracorporeal shock wave lithotripsy in a spinal cord injury patient with a cardiac pacemaker.OBJECTIVES: To review the precautions to be observed before and during extracorporeal shock wave lithotripsy (ESWL) in spinal cord injury (SCI) patients with a cardiac pacemaker and the safety of bilateral ESWL performed on the same day. DESIGN: A case report of bilateral ESWL in a SCI patient with a permanent cardiac pacemaker. SETTING: The Regional spinal injuries Centre, Southport, the lithotripsy Unit, the Royal Liverpool University hospitals NHS trust, Liverpool, and the Department of cardiology, Manchester Royal Infirmary, Manchester, UK. SUBJECT: A 43-year-old male sustained a T-4 fracture and developed paraplegia with a sensory level at T-2. During the post-injury period, he developed episodes of asystole requiring implantation of a dual chamber (DDD) permanent pacemaker. Twenty-one months later, he developed a right ureteric calculus with hydronephrosis. A radio-opaque shadow was seen in the left kidney with no hydronephrosis. During right ureteric stenting, the ureteric stone was pushed into the renal pelvis. 1,500 shock waves were delivered to this stone on the right side, followed by ESWL to the left intra-renal stone with 1250 shock waves. RESULTS: The patient tolerated ESWL to both kidneys. The pacemaker was reprogrammed to a single chamber ventricular pacing mode at 30 beats per minute with a reduced sensitivity during lithotripsy. There were no untoward cardiac events during or after lithotripsy. The serum creatinine was 45 micromol/l before lithotripsy and 44 micromol/l two weeks after ESWL. CONCLUSION: SCI patients with a cardiac pacemaker may be able to undergo extracorporeal shock wave lithotripsy following temporary reprogramming of the pacemaker. Bilateral, simultaneous ESWL is safe in the vast majority of patients provided that there is no risk of simultaneous ureteric obstruction by stone fragments. However, it should be remembered that a decrease in renal function could occur following bilateral ESWL of renal calculi.- - - - - - - - - - ranking = 1keywords = calculus (Clic here for more details about this article) |
4/45. Giant calculus of the posterior urethra following recurrent penile urethral stricture.A case of an unusually large, proximal urethral calculus located very close to the external sphincter and caused by recurrent urethral stricture is presented.- - - - - - - - - - ranking = 5keywords = calculus (Clic here for more details about this article) |
5/45. Traumatic urethral fistula.An 11-year-old male was passing urine from an opening on the undersurface of the penis as well as from the normal meatal opening. He had passed a calculus per urethra 1.5 years previously. Operative intervention revealed it to be a distal urethral fistula 1 cm proximal to the original meatus. A double-layered repair using local tissue was done, achieving good results.- - - - - - - - - - ranking = 1keywords = calculus (Clic here for more details about this article) |
6/45. Penile urethral obstruction in a subject with spinal cord injury.STUDY DESIGN: Single case report. OBJECTIVE: To report a case of urethral obstruction because of calculus in a subject with spinal cord injury (SCI). SETTING: Bangalore, india. CASE REPORT: A 25-year-old man sustained complete SCI at C(6) level following a road traffic accident. After 14 months, while on self-intermittent catheterization he noticed difficulty in introducing catheter and acute retention of urine. X-ray examination revealed a calculus in the penile urethra at the level of the glans penis. CONCLUSION: Impaction of calculi in penile urethra, although rare, can manifest with acute painless urinary retention in patients with SCI.- - - - - - - - - - ranking = 2keywords = calculus (Clic here for more details about this article) |
7/45. renal insufficiency secondary to 2,8-dihydroxyadenine urolithiasis.A 48-year-old man with a history of recurrent urolithiasis and chronic renal failure underwent a nephrectomy for a renal mass. At surgery the mass proved to be a calculus impacted in a dilated calyx. Gross examination of the kidney revealed chalky white deposits in the deep medulla and papillary tips. Histologic examination revealed chronic interstitial nephritis with brown spicules within some tubular epithelial cells and larger deposits of brown crystals within tubular lumina, the interstitium of the medulla, and papillary tips. Polarization microscopy revealed individual crystals scattered throughout the renal parenchyma. Although the arrangement of the crystals was reminiscent of uric acid, and, in fact, a clinical diagnosis of gouty nephropathy was made, x-ray diffraction analysis demonstrated crystals of 2,8-dihydroxyadenine. Enzymatic studies confirmed the complete absence of adenine phosphoribosyltransferase activity in erythrocyte lysates.- - - - - - - - - - ranking = 1keywords = calculus (Clic here for more details about this article) |
8/45. Recurrent vesical calculi, hypercalciuria, and biochemical evidence of increased bone resorption in an adult male with paraplegia due to spinal cord injury: is there a role for intermittent oral disodium etidronate therapy for prevention of calcium phosphate bladder stones?STUDY DESIGN: Clinical case report with comments by colleagues from sweden, poland, spain, brazil, japan, belgium and switzerland. OBJECTIVES: To discuss the role of disodium etidronate therapy for prevention of calcium phosphate vesical calculi in persons with spinal cord injury, who have hypercalciuria and biochemical evidence of increased bone resorption. SETTING: Regional spinal injuries Centre, Southport, UK. methods: A 21-year-old male sustained paraplegia (T-10; asia scale: A) in a road traffic accident in June 2001. He had an indwelling urethral catheter until the end of August 2001, when he started self-catheterisation. He developed bladder stones and electrohydraulic lithotripsy (EHL) was performed in May 2002. All stone fragments were removed. recurrence of vesical calculi was noted in October 2002. These stones were fragmented by lithoclast lithotripsy in two sessions, in December 2002 and February 2003; all stone fragments were removed at the end of the second session. This patient reverted to indwelling catheter drainage when vesical calculi recurred. In September 2003, X-ray of the abdomen showed recurrence of vesical calculi. By February 2004, the stones had increased in size and number. EHL of vesical calculi was again performed in April 2004. Complete clearance was achieved. RESULTS: A 24-h urinalysis detected hypercalciuria--18.7 mmol/day (reference range: 2.5-7.5). Biochemical analysis of vesical calculus revealed calcium phosphate (85%) and magnesium ammonium phosphate (15%). plasma C-terminal telopeptide (CTX) was increased - 1.06 ng/ml (reference range: 0.1-0.5 ng/ml). Free deoxypyridinoline/creatinine ratio (fDPD/Cr) in urine was also increased - 20.2 (reference range: 2.3-5.4). In April 2004, this patient was prescribed disodium etidronate 400 mg day. Nearly 3 months after commencing therapy with etidronate, plasma CTX decreased to 0.87 ng/ml. fDPD/Cr in urine also decreased to 12.4. After 4 months of etidronate therapy, 24-h urinary calcium excretion had decreased to 6.1 mmol/day. CONCLUSION: Etidronate (400 mg daily) is a very effective inhibitor of calcium phosphate crystallisation. Etidronate decreased urinary excretion of calcium, an important factor in prevention of calcium phosphate bladder stones. Etidronate therapy is not a substitute for other well-established methods for prevention of vesical calculi in spinal cord injury patients, for example, large fluid intake, avoiding long-term catheter drainage. Intermittent therapy with etidronate may be considered in selected patients, in whom hypercalciuria persists after instituting nonpharmacological therapy for an adequate period, for example, early mobilisation, weight-bearing exercises, and functional electrical stimulation. However, possible side effects of etidronate, and the fact that etidronate is not licensed in United Kingdom for prevention of urolithiasis, should be borne in mind.- - - - - - - - - - ranking = 1keywords = calculus (Clic here for more details about this article) |
9/45. urolithiasis associated with topiramate.OBJECTIVE: Topiramate is a sulfamate-substituted monosaccharide anticonvulsant used as adjunctive therapy for intractable refractory seizures. It is report a case of topiramate-induced urolithiasis. CASE REPORT: A 35-year-old man presented with acute, right-sided, colicky flank pain. He denied hematuria or dysuria. He was in use of phenytoin, risperidone, phenobarbital, and topiramate. The total daily dose of topiramate was 375 mg. A CT scan showed a 7 x 1 mm curvilinear density at the right ureterovesical junction with proximal hydrouretronephrosis. He was managed with rigid ureteroscopic stone extraction and the calculus metabolic analysis revealed the stone was composed of carbonate apatite (70%), calcium oxalate dihydrate (20%), and calcium oxalate monohydrate (10%). COMMENTS: The present case typifies many features of topiramate-induced urolithiasis. Those who care for patients with urinary stone disease should be aware of this association.- - - - - - - - - - ranking = 1keywords = calculus (Clic here for more details about this article) |
10/45. pseudoephedrine and guaifenesin urolithiasis: widening the differential diagnosis of radiolucent calculi on abdominal radiograph.Unenhanced helical computed tomography has played an increasingly important role in the management of urinary tract stones, guiding diagnosis and control of calculus disease. We report computed tomographic and radiographic appearances of a renal calculus composed of pseudoephedrine and guaifenesin in a patient who abused over-the-counter allergy medication.- - - - - - - - - - ranking = 2keywords = calculus (Clic here for more details about this article) |
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