0000000001129972
AUTHOR
Lorenzo E. Derchi
showing 9 related works from this author
Gas-containing renal stones: a red flag for renal infection.
2022
Background Gas in the renal excretory system is described as a consequence of recent procedures but it can be a sign of severe conditions such as fistulas or infections; however, gas-containing renal stones are only rarely encountered. Purpose To describe the association of gas-containing renal stones and urinary tract infection. Material and Methods We performed a retrospective evaluation of the clinical and imaging findings in a series of six patients with gas-containing renal stones and compared our findings with those of patients with gas-containing renal stones reported in the literature. Urine and stone cultures were used as a diagnostic standard for urinary tract infection. Results I…
Color doppler ultrasonography of soft-tissue masses
1998
Purpose: To evaluate the capability of color Doppler ultrasonography to differentiate between benign and malignant soft-tissue tumors. Material and Methods: We reviewed the ultrasonographic (US) and color Doppler (CD) findings in 46 consecutive patients with a palpable periskeletal mass. The presence of 3 or more vascular hila and of tortuous and irregular internal vessels within the lesions was considered an indication of malignancy. The CD diagnosis was compared with that obtained at US alone. Results: The sensitivity and specificity of CD were respectively 85% and 92%; these values were higher than those obtained at US alone, respectively 75% and 50%. Arteriovenous malformations present…
Scrotal Masses
2009
No abstract available
Monitoring of fracture calluses with color Doppler sonography.
1999
Purpose Fracture callus formation is closely associated with vascular invasion, and the use of color Doppler sonography has been suggested as a means to monitor, earlier than gray-scale sonography, the first stages of the healing process. We report the findings in a series of patients with tibial fractures in whom both gray-scale sonography and color Doppler imaging were employed to monitor new bone formation at the fracture site. Methods Twenty patients with tibial fractures treated with external fixator frames were examined sonographically about 10 days after surgery and then about every 25 days until radiographic demonstration of consolidation. Results Eighteen of 20 patients had a well-…
Imaging of urinary bladder hernias
2005
Lorenzo E. Bacigalupo1, Michele Bertolotto2, Filippo Barbiera3, Pietro Pavlica4, Roberto Lagalla3, Roberto S. Pozzi Mucelli2, Lorenzo E. Derchi1 Bacigalupo LE, Bertolotte M, Barbiera F, et al. erniation of the urinary bladder is not rare. It is usually considered that 1–3% of all inguinal hernias involve the bladder [1], and Iason [2], in 1944, reported an incidence of 10% in men older than 50 years. Most bladder hernias involve the inguinal and femoral canals, with the latter more frequent in women, and a predilection for the right side has been reported. However, herniations through ischiorectal, obturator, and abdominal wall openings have also been described. Any portion of the bladder m…
Color Doppler ultrasonography in pediatric intussusception.
1994
CDU was used in 11 children with intussusception. Demonstration of vascular images within the "pseudokidney" mass was possible in none of 11 cases. Of them, eight could be treated by hydrostatic reduction. In the remaining case, marked edema of the bowel wall did not allow reduction, and surgery had to be performed: no necrosis was observed in the surgical specimen. Both patients in whom CDU failed to demonstrate vascular signals had necrosis at surgery, and bowel resection was performed. Because of the limited number of patients examined at this time, no firm conclusions can be drawn from our experience. However, CDU seems a promising technique in detecting vascular changes occurring in in…
Synchronous parenchymal renal tumors of different histology in the same kidney
2009
Background: Synchronous primary cortical tumors of different histology in the same kidney are rare. Preoperative awareness of this coexistence is important, since it can help in planning the surgical approach. Purpose: To describe the imaging findings observed in five patients with two parenchymal malignant tumors of different histology in the same kidney. Material and Methods: We reviewed the pathology reports of 381 patients operated for renal tumors from January 2000 to March 2007. The medical records of all patients with multiple, synchronous, primary lesions of different histology in the same kidney were reviewed with special attention to imaging findings and indications on the nature…
Microsurgical testis-sparing surgery in small testicular masses: seven years retrospective management and results
2012
OBJECTIVE To retrospectively evaluate the clinical outcomes of 20 patients diagnosed with a nonpalpable or small testicular mass (2 cm) at 2 academic urological department. Testis-sparing surgery (TSS) is currently performed routinely for the management of nonpalpable testicular masses. High reliability of frozen section examination (FSE) and high-frequency ultrasound (US) and the adoption of microsurgical techniques improved safety and feasibility of this technique.METHODS From January 2004 to March 2011, 23 patients underwent microsurgical TSS. An inguinal approach was performed in 22 cases and a suprapubic incision in one bilateral case. All procedures were performed with an operating mi…
Sonographic appearances of the postoperative testis
2015
Purpose: To describe the sonographic findings observed in the testis in patients who have undergone testicle-sparing surgery and surgical biopsies. Methods: We reviewed the color Doppler sonographic findings from 14 patients after testicular interventions: 2 open biopsy procedures for infertility and 12 testicle-sparing surgical procedures (1 for spontaneous intratesticular hemorrhage and 11 for small tumors). Ten patients had benign tumors; one had a malignancy. Three patients were symptomatic; all others were studied as follow-up. Results: Hypoechoic and hypovascular lesions at site of surgery were seen in 10 of the 11 patients after tumorectomy; no changes were observed in one patient. T…