1.Comparing long term treatment outcomes of patients with acute myelogenous leukemia who received doxorubicin and cytarabine induction chemotherapy compared with first-line regimen idarubicin plus cytarabine: A retrospective cohort study
Jacqueline Rose E. Agustin ; Ma. Rosario Irene D. Castillo ; Jomell Julian
Philippine Journal of Internal Medicine 2025;63(2):85-90
RATIONALE AND OBJECTIVES
The burden of acute myeloid leukemia (AML) is felt worldwide with increasing number of diagnosed cases. A recommended treatment option for a longer remission is hematopoietic stem cell transplantation after chemotherapy with cytarabine and an anthracycline antibiotic, either Idarubicin or Daunorubicin. In the Philippines, Doxorubicin, a cheaper and more accessible option for chemotherapy among those who have financial incapabilities. It is no longer part of the National Comprehensive Cancer Network (NCCN) recommendation for use however; it remains to be part of the Philippine National Clinical Practice Guideline in the treatment of AML. This leads us to wonder what the difference in outcome of patients who have received doxorubicin compared to those who received Idarubicin as induction chemotherapy.
RESEARCH DESIGN AND METHODOLOGYThis is a retrospective cohort study. Data was collected through chart review of AML patients admitted for induction chemotherapy. Descriptive statistics was used to analyze the sociodemographic and clinical profile of patients. Survival analysis was done using the Kaplan-Meier computation. The t-test for two proportions was used to compare outcomes between the two groups.
RESULTSThis study included 65 participants, 55 received idarubicin and 10 received doxorubicin. The average age of diagnosis in the Idarubicin group is 41.38 years, and 34.9 years in the Doxorubicin group. Majority of participants are females (58.18% vs 80%) and married (67.27% vs 60%). They are predominantly nonsmokers (89.09% vs 80%), with no maintenance medications (61.82% vs 70%), and comorbidities (70.91% vs 90%). There was no significant difference in the median overall survival of both groups (507 days vs 428 days, logrank test = 0.74).
DISCUSSION AND CONCLUSIONOutcomes of this study leads us to conclude that Doxorubicin is not inferior to Idarubicin in terms of survival.
Human ; Acute Myelogenous Leukemia ; Leukemia, Myeloid, Acute ; Idarubicin ; Doxorubicin ; Induction Chemotherapy ; Survival
2.Prevalence of menopausal symptoms among young gestational trophoblastic neoplasia survivors and its relationship to their health-related quality of life
Victoria May Hembrador Velasco-redondo ; Maria Stephanie Fay Samadan Cagayan
Philippine Journal of Obstetrics and Gynecology 2025;49(2):114-120
BACKGROUND
Since the advent of chemotherapy, cure rates for gestational trophoblastic neoplasia (GTN) have improved significantly. With increased survival, patients must cope with long-term sequelae of their treatment, including early menopause. Unlike natural menopause, treatment-induced menopause may cause a sudden and dramatic decline in estrogen, which can lead to more severe symptoms.
OBJECTIVESThis study aimed to evaluate the prevalence of menopausal symptoms among young GTN survivors and to determine the impact of these symptoms on their health-related quality of life (QoL).
METHODOLOGYNinety GTN survivors (RESULTS
A total of 90 patients were enrolled in the study with a mean age of 33.06 years. Majority (81.1%) reported at least one menopausal symptom. The most prevalent symptoms were psychological symptoms, followed by somatic, then urogenital problems. Among those with an intact uterus, 8.2% reported permanent amenorrhea. Only Stage III/IV and the presence of total hysterectomy were significantly associated with menopausal symptoms. The presence of menopausal symptoms was significantly associated with poorer health-related QoL among the respondents.
CONCLUSIONMenopausal symptoms are prevalent among young GTN survivors, and these negatively affect their health-related QoL. Emphasis should be placed on recognizing and addressing these symptoms. Adjunctive procedures, especially hysterectomy, should be carefully considered because these are significantly associated with menopausal symptoms.
Human ; Chemotherapy ; Drug Therapy ; Gestational Trophoblastic Neoplasia ; Gestational Trophoblastic Disease ; Menopause
3.Competency of oncology nurses in the safe handling of chemotherapeutic drugs
Vanessa Joy P. Gasat ; Aldren R. Remon
Acta Medica Philippina 2025;59(11):63-74
BACKGROUND
With the increasing cancer burden in the country, nurses’ exposure to chemotherapy is inevitable as they belong to the workforce responsible for its preparation, administration, and disposal. These drugs are hazardous and necessitate special precautions to avoid direct exposure. Essentially, their competency must be aligned with the recommended safety guidelines to maintain quality patient outcomes while ensuring their safety.
OBJECTIVEThe primary aim was to determine the competency level of Oncology nurses in terms of knowledge, skills, and attitude. The results were used to develop a training program framework for competency enhancement.
METHODSA descriptive correlational quantitative study was utilized. The study was conducted from December 2023 to February 2024 across three regions in Luzon, Philippines. The study included 203 Oncology nurses who fit the inclusion criteria. Data were collected via a four-part online questionnaire. Data were analyzed using frequency distribution, mean, standard deviation, and Pearson and Spearman correlation coefficients.
RESULTSOncology nurses exhibited excellent knowledge (x̄ = 16.18) and skills (x̄ = 3.86) but only fair attitudes (x̄ = 2.92). Knowledge correlated negatively with skills (ρs = -0.45, pCONCLUSIONS
Oncology nurses demonstrate comprehensive knowledge and accurate and efficient skills but maintain a neutral attitude toward handling chemotherapeutic drugs. These results relate to the complex interplay between the competency dimensions. There are still gaps and areas needing improvement that should be addressed and supported to align their competencies, especially along the skills and attitude dimensions. Training programs anchored on evidence-based practices and regulatory standards, and promoting a favorable practice environment are vital for their competency development.
Human ; Chemotherapy ; Drug Therapy
4.Predictive importance of weight during neoadjuvant chemotherapy on pathologic response and survival outcomes in patients with breast cancer
Philippine Journal of Internal Medicine 2025;63(3):89-97
OBJECTIVES
The influence of weight change on the response to neoadjuvant chemotherapy (NAC) among adult Filipino patients with breast cancer remains unclear. Currently, there has been increasing evidence that weight gain during NAC is associated with increased recurrence risk and decreased survival. This study aimed to investigate this relationship and identify significant predictors of pathologic complete response (pCR), overall survival (OS) and disease-free survival (DFS).
METHODSThis is a retrospective study using data from 52 female patients who received NAC for stage II or III breast cancer and had complete records of weight before and after NAC. Significant predictors of pCR such as host factors and tumor characteristics and associations between weight change and pCR, OS and DFS were examined using univariate and multivariable logistic regression analyses.
RESULTSThe average weight of all patients before NAC was 57.0 kg while the average weight of all patients after NAC was 59.5 kg. The average BMI of all patients before NAC was 25.8 kg/m2. In total, 29 patients (55.8%) were classified in the overweight/obese (OW/OB) group, and the rest were classified in the normal weight/underweight (NW/UW) group. The pCR rate was 51.3% in the OW/OB group versus 48.7% in the NW/UW group (p = 0.11). Initial BMI was a significant factor for achieving pCR (hazard ratio, 3.85; 95% confidence interval [CI], 1.72-8.60, p = 0.001), suggesting that a higher initial BMI was associated with an increased likelihood of achieving pCR. Initial BMI was also an independent prognostic factor for OS (p = 0.0006) and DFS (p = 0.0005). On the other hand, no significant correlation was seen between pCR rates as well as OFS and DFS (p = 0.0551) among patients whose weight changed during the course of treatment.
CONCLUSIONThese findings suggest that while initial weight may significantly predict pCR rates and affect DFS and OS, weight change during treatment may not be as influential. Further research is needed to validate these findings in more diverse and larger patient populations.
Human ; Breast Neoplasms ; Neoadjuvant Chemotherapy ; Neoadjuvant Therapy ; Pathologic Complete Response ; Prognostic Factors ; Prognosis
5.Breast cancer in the Philippines: A financing cost assessment study.
Madeleine DE ROSAS-VALERA ; Julienne Clarize P. LECHUGA ; Lourdes Risa S. YAPCHIONGCO ; Necy S. JUAT ; Mary Juliet DE ROSAS-LABITIGAN ; Maria Lourdes E. AMARILLO ; Leo M. FLORES ; Maebel Audrey R. JOAQUIN ; Adelberto R. LAMBINICIO
Acta Medica Philippina 2025;59(17):7-15
OBJECTIVES
The aim of the study is to estimate the cost of breast cancer diagnosis, treatment, and management in the Philippines. Specifically, it aims to identify the resource requirements and interventions related to breast cancer diagnosis, treatment, and management, measure resource volumes (number of units), learn to value resource items (unit costs), and determine the total cost of treatment per disease stage.
METHODSThe study covered nine tertiary hospitals, seven of which were government hospitals and two were private hospitals, with all tertiary hospitals providing breast cancer services and accredited by Philippine Health Insurance Corporation (PHIC or PhilHealth) for the Z-Benefit Package. Interventions and services related to breast cancer included radiographic procedures, laboratory and imaging tests, chemotherapy drugs and medications, medical and surgical supplies, surgical rates (for breast surgery), accommodation, staff time and salary/professional fees, and other procedure fees. The study conducted in 2022, examined cost prices of breast cancer interventions and services from stage 1–3B.
Purposive and convenience sampling were used based on PhilHealth accreditation and willingness of hospitals to participate in the study. The study conducted a focus group discussion with oncologists, radiologists, anesthesiologists, and other health care providers to validate the clinical guideline used and to solicit inputs to the costing design, analysis framework, and tools for data collection. Data collection of financial cost information (charge price) was conducted using a set of costing matrices filled out by the various departments of the hospitals. Costs and median rates were calculated across hospitals on diagnostics and imaging tests, surgery costs of both public and private facilities, medical treatment, and radiotherapy.
RESULTSBreast MRI, Breast Panel, and Chest CT Scan are the top 3 most expensive diagnostic procedures ranging from PhP 8,102.00 to PhP 9,800.00 per procedure. Surgical procedures for breast cancer at private hospitals and public hospitals showed huge differences in costs. The cost of a cycle of chemotherapy ranges from PhP 596.70 to PhP 3,700.00 per session, while the cost of targeted therapy can cost up to PhP 46,394.21 per session. A year of hormone therapy ranges from PhP 3,276.00 with the use of Tamoxifen, and up to PhP 68,284.00 with Goserelin. Aromatase inhibitors such as Anastrozole and Letrozole cost from PhP 18,000 to PhP 36,000, respectively. Multiple cycles depending on the diagnosis are prescribed per patient and used in combination with other chemotherapy medications or other therapies such as targeted therapy and hormone therapy are usually taken daily up to 5 to 10 years. Conventional radiotherapy can cost up to PhP 88,150.00 covering 28 sessions, CT simulation, and CT planning.
CONCLUSIONThis cost study provides relevant information and better perspective on benefit development for the PHIC, policy development for Department of Health on where and how to focus their support for the patient’s financial preparedness to address medical and f inancial catastrophes.
PhilHealth needs to guide the health care providers of their costing method and to develop their own integrated, interoperable, and comprehensive cost data library.
It recommends that the government allocate budget and cover for screening and assessment for earlier stage diagnosis of patients and lower health expenditure costs on cancer treatment.
Human ; Breast Neoplasms ; Drug Therapy ; Chemotherapy ; Mastectomy ; Radiotherapy ; Radiation Therapy
6.Breast cancer in the Philippines: A financing cost assessment study
Madeleine De rosas-valera ; Julienne Clarize P. Lechuga ; Lourdes Risa S. Yapchiongco ; Necy S. Juat ; Mary Juliet De rosas-labitigan ; Maria Lourdes E. Amarillo ; Leo M. Flores ; Maebel Audrey R. Joaquin ; Adelberto R. Lambinicio
Acta Medica Philippina 2025;59(Early Access 2025):1-9
OBJECTIVES
The aim of the study is to estimate the cost of breast cancer diagnosis, treatment, and management in the Philippines. Specifically, it aims to identify the resource requirements and interventions related to breast cancer diagnosis, treatment, and management, measure resource volumes (number of units), learn to value resource items (unit costs), and determine the total cost of treatment per disease stage.
METHODSThe study covered nine tertiary hospitals, seven of which were government hospitals and two were private hospitals, with all tertiary hospitals providing breast cancer services and accredited by Philippine Health Insurance Corporation (PHIC or PhilHealth) for the Z-Benefit Package. Interventions and services related to breast cancer included radiographic procedures, laboratory and imaging tests, chemotherapy drugs and medications, medical and surgical supplies, surgical rates (for breast surgery), accommodation, staff time and salary/professional fees, and other procedure fees. The study conducted in 2022, examined cost prices of breast cancer interventions and services from stage 1–3B.
Purposive and convenience sampling were used based on PhilHealth accreditation and willingness of hospitals to participate in the study. The study conducted a focus group discussion with oncologists, radiologists, anesthesiologists, and other health care providers to validate the clinical guideline used and to solicit inputs to the costing design, analysis framework, and tools for data collection. Data collection of financial cost information (charge price) was conducted using a set of costing matrices filled out by the various departments of the hospitals. Costs and median rates were calculated across hospitals on diagnostics and imaging tests, surgery costs of both public and private facilities, medical treatment, and radiotherapy.
RESULTSBreast MRI, Breast Panel, and Chest CT Scan are the top 3 most expensive diagnostic procedures ranging from PhP 8,102.00 to PhP 9,800.00 per procedure. Surgical procedures for breast cancer at private hospitals and public hospitals showed huge differences in costs. The cost of a cycle of chemotherapy ranges from PhP 596.70 to PhP 3,700.00 per session, while the cost of targeted therapy can cost up to PhP 46,394.21 per session. A year of hormone therapy ranges from PhP 3,276.00 with the use of Tamoxifen, and up to PhP 68,284.00 with Goserelin. Aromatase inhibitors such as Anastrozole and Letrozole cost from PhP 18,000 to PhP 36,000, respectively. Multiple cycles depending on the diagnosis are prescribed per patient and used in combination with other chemotherapy medications or other therapies such as targeted therapy and hormone therapy are usually taken daily up to 5 to 10 years. Conventional radiotherapy can cost up to PhP 88,150.00 covering 28 sessions, CT simulation, and CT planning.
CONCLUSIONThis cost study provides relevant information and better perspective on benefit development for the PHIC, policy development for Department of Health on where and how to focus their support for the patient’s financial preparedness to address medical and f inancial catastrophes.
PhilHealth needs to guide the health care providers of their costing method and to develop their own integrated, interoperable, and comprehensive cost data library.
It recommends that the government allocate budget and cover for screening and assessment for earlier stage diagnosis of patients and lower health expenditure costs on cancer treatment.
Human ; Breast Neoplasms ; Drug Therapy ; Chemotherapy ; Mastectomy ; Radiotherapy ; Radiation Therapy
7.Testicular tumours in children: a single-centre experience.
Sajid ALI ; Tariq LATIF ; Muhammad Ali SHEIKH ; Shazia PERVEEN ; Muhammad BILAL ; Albash SARWAR
Singapore medical journal 2025;66(6):321-326
INTRODUCTION:
Testicular tumours in childhood have diverse characteristics for different age ranges. This study aimed to describe the pattern, presentation and outcomes of primary testicular tumours in a paediatric population.
METHODS:
A retrospective study was conducted from January 2010 to December 2020 on children (≤18 years) with a diagnosis of primary testicular tumour. Baseline demographics, clinical characteristics, pathology, treatment and outcomes of these patients were analysed. The data were entered into IBM SPSS Statistics version 20.0. Chi-square test and Fisher's exact test were applied to find the statistical significance, which was set at P value ≤ 0.05.
RESULTS:
The study included 115 males, with 85 (73.9%) patients in the prepubertal age range with a mean age of 2.53 ± 2.06 years and 30 (26.1%) patients in the postpubertal group with a mean age of 15.73 ± 1.25 years. Yolk sac tumour was the most common (62.6%) histological subtype. Majority (46.1%) of patients had stage I disease on presentation, while 29.6% had stage IV disease. All patients underwent upfront high inguinal radical orchiectomy, which was followed by platinum-based adjuvant chemotherapy in 67% of the patients. The five-year event-free survival and overall survival for all patients were 75% and 91%, respectively.
CONCLUSION
Primary testicular tumours follow a bimodal age distribution pattern. Majority of patients can be cured with platinum-based chemotherapy despite having advanced disease at presentation.
Humans
;
Male
;
Testicular Neoplasms/mortality*
;
Retrospective Studies
;
Adolescent
;
Child
;
Child, Preschool
;
Orchiectomy/methods*
;
Chemotherapy, Adjuvant
;
Treatment Outcome
;
Neoplasm Staging
;
Infant
;
Endodermal Sinus Tumor/therapy*
;
Neoplasms, Germ Cell and Embryonal
8.Reconstruction of bone defects after resection of osteosarcoma in children with artificial hemi-knee prosthesis.
Rongkai SHEN ; Meng CHEN ; Fei CHEN ; Yaoguang SONG ; Xia ZHU
Chinese Journal of Reparative and Reconstructive Surgery 2025;39(7):824-830
OBJECTIVE:
To explore the effectiveness of artificial hemi-knee prosthesis reconstruction for bone defects after resection of pediatric osteosarcoma.
METHODS:
A retrospective analysis was conducted on the clinical data of 18 children with osteosarcoma who met the selection criteria and were treated between January 2016 and December 2019. There were 11 males and 7 females, aged 6-10 years (mean, 8.9 years). Osteosarcoma located in the distal femur in 11 cases and the proximal tibia in 7 cases. Among them, 12 cases were conventional osteosarcoma and 6 cases were small cell osteosarcoma, with a disease duration of 1-9 months (mean, 3.1 months). All patients received 2 cycles of preoperative chemotherapy with doxorubicin, cisplatin, and ifosfamide. After en bloc tumor segment resection, bone defects were reconstructed using custom-made artificial hemi-knee prostheses. Rehabilitation training was initiated at 8 weeks postoperatively under the protection of a knee immobilizer brace, combined with 4 cycles of adjuvant chemotherapy. During follow-up, lower limb growth length and limb shortening (compared with the healthy side) were measured, and limb function was evaluated using the Musculoskeletal Tumor Society-93 (MSTS-93) scoring system.
RESULTS:
All surgeries were successfully completed, with an operation time of 2.0-3.1 hours (mean, 2.4 hours) and intraoperative blood loss of 180-320 mL (mean, 230.0 mL). Incisional edge necrosis occurred in 1 case at 10 days postoperatively, while the incisions of the remaining 17 patients healed by first intention. One case developed periprosthetic infection caused by Staphylococcus aureus at 1 week postoperatively, which was cured after symptomatic treatment. All 18 patients were followed up 60-96 months (mean, 74.2 months). No local tumor recurrence was observed during follow-up. Imaging examinations showed prosthesis loosening in 2 cases, while the prosthesis of other patients were well-positioned. At last follow-up, the knee joint range of motion was 80°-120° (mean, 106.7°). The MSTS-93 score was 16-29 (mean, 24.7), with 12 cases rated as excellent, 5 good, and 1 fair. The patients' height increased by 12.8-20.0 cm (mean, 15.5 cm), the lower limb growth length was 6.0-13.0 cm (mean, 9.7 cm), and limb shortening was 1.8-4.6 cm (mean, 3.1 cm). There was no significant difference in MSTS-93 scores, lower limb growth length, or limb shortening between the distal femur group and the proximal tibia group ( P>0.05).
CONCLUSION
Artificial hemi-knee prosthesis reconstruction can preserve the adjacent normal epiphysis of the knee joint, maximize limb growth potential, and reduce adult limb length discrepancy, making it a suitable reconstruction option for children with knee osteosarcoma.
Humans
;
Osteosarcoma/surgery*
;
Male
;
Child
;
Female
;
Knee Prosthesis
;
Retrospective Studies
;
Bone Neoplasms/surgery*
;
Plastic Surgery Procedures/methods*
;
Tibia/surgery*
;
Femur/surgery*
;
Arthroplasty, Replacement, Knee/methods*
;
Treatment Outcome
;
Chemotherapy, Adjuvant
;
Femoral Neoplasms/surgery*
9.Recurrent spontaneous miscarriages from sperm after ABVD chemotherapy in a patient with Hodgkin's lymphoma: sperm DNA and methylation profiling.
Gwendoline LECUYER ; Antoine D ROLLAND ; Anne-Sophie NEYROUD ; Bertrand EVRARD ; Nathan ALARY ; Clemence GENTHON ; Nathalie DEJUCQ-RAINSFORD ; Célia RAVEL ; Jessika MOREAU ; Nathalie MOINARD ; Mohamed Hadi Mohamed ABDELHAMID ; Christophe KLOPP ; Louis BUJAN ; Frédéric CHALMEL
Asian Journal of Andrology 2025;27(5):598-610
Lymphomas represent one of the most common malignant diseases in young men and an important issue is how treatments will affect their reproductive health. It has been hypothesized that chemotherapies, similarly to environmental chemicals, may alter the spermatogenic epigenome. Here, we report the genomic and epigenomic profiling of the sperm DNA from a 31-year-old Hodgkin lymphoma patient who faced recurrent spontaneous miscarriages in his couple 11-26 months after receiving chemotherapy with adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD). In order to capture the potential deleterious impact of the ABVD treatment on mutational and methylation changes, we compared sperm DNA before and 26 months after chemotherapy with whole-genome sequencing (WGS) and reduced representation bisulfite sequencing (RRBS). The WGS analysis identified 403 variants following ABVD treatment, including 28 linked to genes crucial for embryogenesis. However, none were found in coding regions, indicating no impact of chemotherapy on protein function. The RRBS analysis identified 99 high-quality differentially methylated regions (hqDMRs) for which methylation status changed upon chemotherapy. Those hqDRMs were associated with 87 differentially methylated genes, among which 14 are known to be important or expressed during embryo development. While no variants were detected in coding regions, promoter regions of several genes potentially important for embryo development contained variants or displayed an altered methylated status. These might in turn modify the corresponding gene expression and thus affect their function during key stages of embryogenesis, leading to potential developmental disorders or miscarriages.
Humans
;
Male
;
Hodgkin Disease/drug therapy*
;
Adult
;
DNA Methylation/drug effects*
;
Bleomycin/therapeutic use*
;
Spermatozoa/metabolism*
;
Vinblastine/therapeutic use*
;
Antineoplastic Combined Chemotherapy Protocols/therapeutic use*
;
Abortion, Habitual/genetics*
;
Doxorubicin/therapeutic use*
;
Dacarbazine/therapeutic use*
;
Female
;
Pregnancy
10.Clinical characteristics and survival analysis of pediatric Hodgkin lymphoma: a multicenter study.
Ying LIN ; Li-Li PAN ; Shao-Hua LE ; Jian LI ; Bi-Yun GUO ; Yu ZHU ; Kai-Zhi WENG ; Jin-Hong LUO ; Gao-Yuan SUN ; Yong-Zhi ZHENG
Chinese Journal of Contemporary Pediatrics 2025;27(6):668-674
OBJECTIVES:
To investigate the clinicopathological characteristics and prognostic factors of pediatric Hodgkin lymphoma (HL).
METHODS:
A retrospective analysis was conducted on the clinical data of children with newly diagnosed HL from January 2011 to December 2023 at four hospitals: Fujian Medical University Union Hospital, Fujian Medical University Zhangzhou Hospital, First Affiliated Hospital of Xiamen University, and Fujian Children's Hospital. Patients were categorized into low-risk (R1), intermediate-risk (R2), and high-risk (R3) groups based on HL staging and pre-treatment risk factors. The patients received ABVD regimen or Chinese Pediatric HL-2013 regimen chemotherapy. Early treatment response and long-term efficacy were assessed, and prognostic factors were analyzed using the Cox proportional hazards regression model.
RESULTS:
The overall complete response (CR) rates after 2 and 4 cycles of chemotherapy were 42% and 68%, respectively. Compared with the ABVD regimen group, patients treated with the HL-2013 regimen in the R1 group showed significantly higher CR rates after both 2 and 4 cycles (P<0.05). However, no statistically significant differences in CR rates were observed between the two regimens in the R2 and R3 groups (P>0.05). The 5-year event-free survival (EFS) rate, overall survival rate, and freedom from treatment failure rate were 83%±4%, 97%±2%, and 88%±4%, respectively. Cox analysis indicated that the presence of a large tumor mass at diagnosis and failure to achieve CR after 4 cycles of chemotherapy were independent risk factors for lower EFS rates (P<0.05).
CONCLUSIONS
Pediatric HL generally has a favorable prognosis. The presence of a large tumor mass at diagnosis and failure to achieve CR after 4 cycles of chemotherapy indicate poor prognosis.
Humans
;
Hodgkin Disease/pathology*
;
Male
;
Child
;
Female
;
Adolescent
;
Retrospective Studies
;
Child, Preschool
;
Antineoplastic Combined Chemotherapy Protocols/therapeutic use*
;
Prognosis
;
Proportional Hazards Models
;
Survival Analysis
;
Infant


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