Karla Estefania

Dr. Karla Estefania

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 January 2023 in American Journal of Transplantation
Verified
Journal Article
Open access
AAAne M. Andres
Ane M. Andres
JEJose Luis Encinas
Jose Luis Encinas
ASAlba Sánchez-Galán
Alba Sánchez-Galán
JRJavier Serradilla Rodríguez
Javier Serradilla Rodríguez
KEKarla Estefania
Karla Estefania
FHFrancisco Hernandez
Francisco Hernandez
The current shortage of pediatric multivisceral donors accounts for the long time and mortality on the waiting list of pediatric patients. The use of donors after cardiac death, especially after the outbreak of normothermic regional perfusion, has increased in recent years for all solid organs except the intestine, mainly because of its higher susceptibility to ischemia-reperfusion injury. We present the first literature case of multivisceral donors after cardiac death transplantation in a 13-month-old recipient from a 2.5-month-old donor. Once exitus was certified, an extracorporeal membrane oxygenation circuit was established, cannulating the aorta and infrarenal vena cava, while the supra-aortic branches were clamped. The abdominal organs completely recovered from ischemia through normothermic regional perfusion (extracorporeal membrane oxygenation initially and beating heart later). After perfusion with the preservation solution, the multivisceral graft was uneventfully implanted. Two months later, the patient was discharged without any complications. This case demonstrates the possibility of reducing the time spent on the waiting list for these patients.

20 March 2022 in Pediatric Transplantation
Verified
Journal Article
Closed access
KEKarla Estefania
Karla Estefania
AAAne Andrés
Ane Andrés
AAAlida Alcolea
Alida Alcolea
MVMaría Velayos‐López
María Velayos‐López
LPLaura G. Pastrían
Laura G. Pastrían
FHFrancisco Hernández
Francisco Hernández

7 July 2025 in Children
Verified
Journal Article
Open access
PDF file
KEKarla Estefania
Karla Estefania
PTPaloma Triana
Paloma Triana
CRCarla Ramírez-Amorós
Carla Ramírez-Amorós
MGMireia Gaspar-Pérez
Mireia Gaspar-Pérez
AMAntonio Jesús Muñoz-Serrano
Antonio Jesús Muñoz-Serrano
JGJuan Carlos López Gutiérrez
Juan Carlos López Gutiérrez
Background: Congenital hepatic hemangiomas (CHHs) are typically considered rapidly involuting tumors, similar to their cutaneous counterparts (RICHs). However, non-involuting tumors remain poorly characterized. This study examines the evolutionary patterns and management strategies for non-involuting congenital hepatic hemangiomas (NICHHs). Methods: We conducted a retrospective review of clinical, imaging, histological, and genetic data of children diagnosed with NICHH—defined as showing no signs of involution for at least 18 months—between 1991 and 2022. Results: Seven patients (five females, two males) were identified. The median age at diagnosis was 42 days (range: 0–1440). Five patients had asymptomatic lesions, predominantly located in the right hepatic lobe. Histologic confirmation was available in three cases, and a GNAQ gene mutation was identified in one. The median follow-up period was 75 months (range: 35–191). Three patients with giant NICHH were treated with sirolimus, resulting in partial response in two cases and lesion stabilization in one. The four untreated patients showed diverse evolutionary patterns, including delayed involution and tardive growth. Conclusions: NICHH lesions demonstrate distinct long-term evolution. Accurate diagnosis and regular monitoring are essential to avoid unnecessary interventions. Sirolimus may offer a promising non-surgical treatment for select patients, particularly those with giant lesions.

8 September 2022 in European Journal of Pediatric Surgery
Verified
Journal Article
Closed access
PDF file
KEKarla Estefania
Karla Estefania
JSJavier Serradilla
Javier Serradilla
CRCarla Ramirez
Carla Ramirez
MVMaria Velayos
Maria Velayos
AMAntonio Jesús Muñoz-Serrano
Antonio Jesús Muñoz-Serrano
CTCarlos De la Torre
Carlos De la Torre
Introduction Postoperative rhabdomyolysis (RML) has been documented after several surgical procedures in adults. Musculoskeletal remodeling after Nuss procedure for pectus excavatum (PE) could cause RML. We evaluated the incidence of RML after Nuss procedure in children. Methods This study was a prospective study from 2018 to 2021. We enrolled all otherwise healthy patients who underwent PE correction with only one bar. Studied variables included demographic and clinical data, duration of surgery, complications, and length of hospitalization. The patients included underwent serial measurements of serum creatine kinase (CK), troponin I, N terminal pro B-type natriuretic peptide (NT-proBNP), serum creatinine, urea, and glomerular filtration rate at 6 and 48 hours postoperatively, and hospital discharge. Results Forty-six patients met criteria (40 males/6 females), with a mean age of 15.1 ± 1.4 years. Mean duration of surgery was 74 ± 28 minutes, and length of hospitalization was 4.6 ± 1.6 days. RML was diagnosed in 30.4% of patients at 6 hours, 91.3% at 48 hours, and 21.7% at hospital discharge. Mean preoperative CK value was 181.1 ± 141.6 IU/L, and postoperative values were 863.3 ± 302.6 IU/L at 6 hours, 1,675.2 ± 561 IU/L at 48 hours, and 850 ± 683.7 IU/L at hospital discharge, with statistically significant differences (p = 0.001). High-sensitivity troponin I and NT-proBNP levels increased significantly during the postoperative time (p = 0.001). Renal function remained stable (p = 0.55). Conclusion Nuss technique produces RML without kidney injury in healthy patients. This knowledge should be considered for patients at increased risk of developing acute kidney injury and other complications.

28 May 2025 in Preprints.org
Verified
Preprint
Open access
PDF file
KEKarla Estefania
Karla Estefania
PTPaloma Triana
Paloma Triana
CRCarla Ramirez‐Amoros
Carla Ramirez‐Amoros
MGMireia Gaspar-Perez
Mireia Gaspar-Perez
AMAntonio Jesús Muñoz-Serrano
Antonio Jesús Muñoz-Serrano
JLJuan Carlos López-Gutiérrez
Juan Carlos López-Gutiérrez
Background: Focal liver hemangiomas have traditionally been considered as rapidly involuting tumors, akin to their cutaneous counterparts (RICH). However, non-involuting tumors remain poorly investigated and inadequately understood. This study explores the evolution patterns and management strategies for non-involuting congenital hepatic hemangiomas (NICHH). Methods: We conducted a retrospective review of clinical, imaging, histological, and genetic data of children diagnosed with NICHH (defined as having no signs of involution for at least 18 months) from 1991 to 2022. Results: We included 7 patients (5 females and 2 males) diagnosed with NICHH. The median age at diagnosis was 42 days (range: 0-1440). Seventy-one percent of lesions were asymptomatic, with the right hepatic lobe being the most common location (71.4%). Histological analysis was available in 3 patients confirming the diagnosis of CHH. A genetic study conducted in one patient identified a mutation in GNAQ gene. The median follow-up duration was of 75 months (range: 35-191). During follow-up, 3 patients with giant NICHH received sirolimus treatment, resulting in a partial response in 2 patients, while the lesion in the other patient remained stable. The 4 untreated patients exhibited various evolutionary patterns, some of which had not been previously described. Conclusions: This is the first case series to examine the long -term evolution of NICHH. Accurate diagnosis and periodic follow-up of these lesions can prevent unnecessary aggressive treatments. Sirolimus may offer a promising option for reducing the size or accelerate the involution of NICHH.