Fistula reno-apendicular como presentación inusual de pielonefritis xantogranulomatosa: reporte de caso / Reno-appendicular fistulus as an unusual presentation of xanthogranulomatous pyelonephritis: a case report

Resumen La fístula uro-entérica es una comunicación patológica entre la vía urinaria y digestiva. El compromiso del apéndice es infrecuente y son pocos los casos de fístulas reno-apendiculares en la literatura. Se presenta el caso de un paciente con clínica de fiebre, dolor lumbar e hidronefrosis derecha severa secundaria a cálculo coraliforme en la tomografía de vías urinarias. Manejado inicialmente con antibióticos y nefrostomía bajo fluoroscopia, posteriormente suspendida por paso de contraste al intestino. Se realizó una tomografía contrastada que reportó fístula del riñón al intestino. Se llevó a nefrectomía y se encontró fistula hacía el apéndice, por lo cual se realizó apendicectomía concomitante con mejoría clínica evidente. La patología reportó pielonefritis xantogranulomatosa y apendicitis secundaria. La fístula reno-apendicular posee una clínica inespecífica, la tomografía contrastada es una herramienta diagnóstica y la mayoría se detectan como un hallazgo intraoperatorio. El tratamiento usualmente es quirúrgico, con nefrectomía y reparación del segmento intestinal. MÉD. UIS.2021;34(3): 79-84.

Abstract Uro-enteric fistula is a pathological communication between the urinary and digestive tract. Compromise of the appendix is infrequent and few cases of reno-appendicular fistulas have been described in the literature. The case of patient with symptoms of fever, low back pain and severe right hydronephrosis secondary to staghorn calculus on urinary tract tomography is presented. Initially managed with antibiotics and nephrostomy under fluoroscopy, subsequently suspended by passing contrast to the intestine. A contrasted tomography was performed which reported a fistula from the kidney to the intestine. A nephrectomy was carried out and a fistula was found to the appendix, for which a concomitant appendectomy was performed with evident clinical improvement. The pathology reported xanthogranulomatous pyelonephritis and secondary appendicitis. Reno-appendicular fistula has nonspecific symptoms, contrasted tomography is a diagnostic tool and most are detected as an intraoperative finding. Treatment is usually surgical, with nephrectomy and intestinal segment repair. MÉD.UIS.2021;34(3): 79-84.

Xanthogranulomatous pyelonephritis with calculus migration into the psoas abscess: an unusual complication

Xanthogranulomatous pyelonephritis (XGP) is a rare variant of chronic pyelonephritis. It is characterized by progressive parenchymal destruction caused by chronic renal obstruction due to calculus, stricture, or rarely tumor, resulting in kidney function loss. Herein, we describe the case of a 36-year-old female who presented with left loin pain, left lower limb pain, and dysuria. On contrast-enhanced computed tomography (CECT), multiple abscesses and an obstructive staghorn calculus were depicted in the left kidney with the classical appearance of "Bear Paw Sign." An abscess with calculi was also present within the left psoas muscle. Though psoas muscle abscess in association with XGP was described, a ureteric fistula and calculi within the psoas muscle have not yet been reported in the literature. Left nephrostomy was performed, which came out to be positive for E. coli on culture. The patient underwent left nephrectomy, and the histopathological report of the surgical specimen confirmed XGP.

Staghorn renal stones: what the urologist needs to know

ABSTRACT Patients with staghorn renal stones are challenging cases, requiring careful preoperative evaluation and close follow-up to avoid stone recurrence. In this article we aim to discuss the main topics related to staghorn renal stones with focus on surgical approach. Most of staghorn renal stones are composed of struvite (magnesium ammonium phosphate) and are linked to urinary tract infection by urease-producing pathogens. Preoperative computed tomography scan and careful evaluation of all urine cultures made prior surgery are essential for a well-planning surgical approach and a right antibiotics choice. Gold standard surgical technique is the percutaneous nephrolithotomy (PCNL). In cases of impossible percutaneous renal access, anatrophic nephrolithotomy is an alternative. Shockwave lithotripsy and flexible ureteroscopy are useful tools to treat residual fragments that can be left after treatment of complete staghorn renal stone. PCNL can be performed in supine or prone position according to surgeon's experience. Tranexamic acid can be used to avoid bleeding. To check postoperative stone-free status, computed tomography is the most accurate imaging exam, but ultrasound combined to KUB is an option. Intra-operative high-resolution fluoroscopy and flexible nephroscopy have been described as an alternative for looking at residual fragments and save radiation exposure. The main goals of treatment are stone-free status, infection eradication, and recurrence prevention. Long-term or short-term antibiotic therapy is recommended and regular control imaging exams and urine culture should be done.

Nefrolitotomía percutánea en pacientes con trastornos de la coagulación / Percutaneous Nephrolithotomy in Patients with Bleeding Disorders

Objetivo Reportar un caso de nefrolitotomía percutánea en paciente con deficiencia de proteína C y S. Introducción Los pacientes con déficit de proteína C y S tienen un riesgo alto de eventos tromboembólicos reportándose tasas de hasta el 6% y 8,4% respectivamente. Reporte de Caso Paciente femenina de 43 años con antecedente de deficiencia de proteína C y S, anticoagulación crónica con warfarina por trombosis venosa profunda (TVP), clínicamente con cuadro de cólico reno ureteral derecho y hematuria, la tomografía de vías urinarias mostró un cálculo coraliforme completo derecho. Fue llevada a nefrolitotomía percutánea derecha previa terapia puente con enoxaparina, el acceso percutáneo fue a través del cáliz inferior. Debido a que no fue posible acceder a los cálculos del cáliz medio y superior y que en la institución donde se realizó el procedimiento no se cuenta con nefroscopio flexible, se decidió realizar una segunda punción en cáliz superior, dejando a la paciente libre de cálculos. Se reinició la anticoagulación plena a las 12 horas del postoperatorio sin presentar sangrado asociado. Discusión Los pacientes con déficit de proteína C y S tienen un riesgo alto para eventos tromboembólicos. Kefer y col., realizaron un estudio en el que evaluaron la eficacia de la terapia puente en pacientes llevados a NLP, encontrando que la anticoagulación con warfarina puede suspenderse 5 días antes y reiniciarse 5 días después del procedimiento quirúrgico sin necesidad de terapia puente con enoxaparina. En la actualidad, las recomendaciones dadas por la Sociedad Americana de Urología, indican realizar la terapia puente mediante un grupo multidisciplinario. Resultados El déficit de proteína C y S corresponde a una entidad, con una prevalencia muy baja y condiciona el requerimiento de anticoagulantes orales de forma indefinida. Fue posible realizar una intervención quirúrgica sin complicaciones hemorrágicas ni tromboembólicas con el uso de terapia puente prequirúrgica.

Objective To report a case of percutaneous nephrolithotomy in patients with protein C and S deficiency. Introduction Patients with protein C and S deficiency have a high risk of thromboembolic events reporting rates of 6% and 8.4%, respectively. Case Report A 43-year-old female patient with a history of protein C and S deficiency with chronic warfarin anticoagulation for deep venous thrombosis (DVT). CT scan with full right staghorn calculi. Enoxaparin was administered bridge therapy. She was taken to right percutaneous nephrolithotomy, access was through the lower calyx. Because it was not possible to access the calculus of the middle and upper calyx it was necessary to perform a second puncture in the upper calyx, leaving the patient free of calculus. Full anticoagulation was resumed at 12 hours postoperatively without associated bleeding. Discussion Patients with protein C and S deficits are at high risk for thromboembolic events. Kefer et al. conducted a study evaluating the efficacy of bridge therapy in patients on NLP, finding that warfarin anticoagulation can be discontinued 5 days earlier and restarted 5 days after the surgical procedure without the need for enoxaparin bridging therapy. Results The protein C and S deficiency corresponds to an entity, with a very low prevalence and conditions the requirement of oral anticoagulants indefinitely. It was possible to perform a surgical procedure without hemorrhagic or thromboembolic complications.

Complicaciones anestésicas intraoperatorias y posoperatorias de la nefrolitotomía percutánea en pacientes con litiasis coraliforme / Intraoperative and postoperative anesthesia-related complications of percutaneous nephrolithotomy in patients with coraliform lithiasis

Introducción: En la actualidad la litiasis renal constituye entre el 20 y el 30 por ciento de las consultas de urología en el mundo. Objetivos: Identificar las complicaciones intra- y posoperatorias de la nefrolitotomía percutánea en pacientes con litiasis coraliforme. Métodos: Se realizó un estudio descriptivo en pacientes con diagnóstico de litiasis coraliforme ingresados para nefrolitotomía percutánea electiva en el Hospital Clínico Quirúrgico Hermanos Ameijeiras entre octubre 2010 y entre octubre 2015. Resultados: Se identificaron 32 pacientes con complicaciones intra y posoperatorias. Del sexo masculino fueron 68,7 por ciento. La media de la edad fue 47,59 ± 12,2 años. La clasificación ASA más frecuente fue ASA II en 56,2 por ciento. Todos los pacientes recibieron anestesia general. El valor medio de pérdidas hemáticas intraoperatorias fue de 650,00 ± 413,09 mL. La reposición total de volumen fue de 10, 107,80 ± 2, 659,25 mL. Se administró cloro sodio al 0,9 por ciento 7743,75 ± 2007,39 mL y concentrado de hematíes a 18,8 por ciento del total. Las complicaciones intraoperatorias se presentaron en 24 pacientes 75,0 por ciento. De ellas las más frecuentes fueron las metabólicas, cardiovasculares, respiratorias y renales. La hipotermia estuvo presente en la tercera parte de los enfermos. Las complicaciones posoperatorio se presentaron en 23 pacientes 71,9 por ciento. De ellas, cardiovasculares, respiratorias, renales y sépticas fueron las más frecuentes. Conclusiones: Las complicaciones fueron frecuentes y graves; sin embargo, se logró un porcentaje importante de pacientes egresados curados(AU)

Introduction: Renal lithiasis currently accounts for 20-30 percent of urology consultations worldwide. Objectives: To identify the intra- and postoperative complications of percutaneous nephrolithotomy in patients with staghorn lithiasis. Methods: A descriptive study was conducted in patients with a diagnosis of staghorn lithiasis and admitted for elective percutaneous nephrolithotomy Hermanos Ameijeiras Clinical-Surgical Hospital between October 2010 and October 2015. Results: We identified 32 patients with intra- and postoperative complications. The male sex was represented by the 68.7 percent. The mean age was 47.59±12.2 years. The most frequent ASA classification was ASA II, accounting for 56.2 percent. All patients received general anesthesia. The mean value of intraoperative hematic losses was 650.00±413.09 mL. Total volume replacement was 10, 107.80±2, 659.25 mL. Chloride sodium 0.9 percent was administered at doses 7743.75±2007.39 mL and packed red blood cells to 18.8 percent of the total. Intraoperative complications occurred in 24 patients, accounting for 75.0 percent. Of these, the most frequent were metabolic, cardiovascular, respiratory and renal. Hypothermia was present in one third of the patients. Postoperative complications occurred in 23 patients, accounting for 71.9 percent. Of these, cardiovascular, respiratory, renal and septic were the most frequent. Conclusions: The complications were frequent and serious. However, an important percentage number was achieved for cured discharge patients(AU)

Simultaneous bilateral percutaneous nephrolithotripsy

From July 1987 to May 1990, a total of 13 simultaneous bilateral percutaneous nephrolithotripsies (PCNL) were performed in two medical institutions for bilateral proximal ureteral stones, bilateral pelvolithiasis and nephrolithiasis, and bilateral staghorn calculi. No major complications occurred. It appears that simultaneous bilateral PCNL has several advantages including reasonable operative time, safety of the procedure and cost effectiveness. Greater applications of this procedures is encouraged. (Author)