1.Anterior Mediastinal Mystery: From Epithelioid Suspicion to a Diagnosis of Metaplastic Revelation
John Patrick O. Chang ; Rex Michael C. Santiago
Philippine Journal of Pathology 2026;(75th PSP Research Competition Abstracts):1-
Introduction:
Metaplastic thymoma is an exceptionally rare thymic epithelial neoplasm, with fewer than
40 cases reported in the literature. It is defined by a distinctive biphasic proliferation of epithelioid epithelial
nests and bland spindle cell fascicles, accompanied by a characteristic immunohistochemical profile. In limited
cytology specimens, the lack of architectural context and potentially incomplete sampling can obscure the
biphasic nature, leading to diagnostic difficulty. We describe a case initially interpreted as an epithelioid
neoplasm on fine needle aspiration (FNA), with subsequent resection confirming metaplastic thymoma.
Case Description:
A 66-year-old male presented with an anterior mediastinal mass. FNA revealed a highly
cellular specimen composed predominantly of polygonal tumor cells arranged in cohesive sheets. The cells
displayed round to ovoid, hyperchromatic nuclei with moderate to marked pleomorphism, irregular nuclear
membranes, conspicuous nucleoli, and abundant eosinophilic cytoplasm. Dystrophic calcifications were noted
within a hemorrhagic background. An epithelioid tumor was favored on cytologic evaluation.
The patient subsequently underwent video-assisted thoracoscopic surgery with excision of the mass. The
specimen was well-encapsulated, lobulated, and traversed by fibrous septations. Microscopically, the tumor
demonstrated a biphasic architecture: cohesive nests of epithelioid cells closely admixed with intersecting
fascicles of bland spindle cells. Immature T-lymphocytes were not identified.
Immunohistochemical staining showed diffuse cytokeratin and p40 positivity in the epithelioid component.
In contrast, the spindle cell component lacked cytokeratin expression but exhibited strong vimentin positivity
and patchy EMA reactivity. Both components were negative for CD5 and CD117. The Ki-67 proliferation
index was low (1–2%).
Discussion:
Diagnosing metaplastic thymoma on cytology is challenging due to the tumor’s inherently
biphasic architecture, which may not be adequately represented in limited FNA samples. In this case, the
cytologic material disproportionately sampled the epithelioid component, masking the spindle cell element
critical for diagnosis. Additionally, the lymphocyte-poor background mimicked type A or AB thymoma, further
contributing to potential misclassification.
Accurate diagnosis relies on careful integration of cytologic features with histologic, immunohistochemical,
radiologic, and clinical data. Recognition of this rare entity is important, as its behavior differs substantially
from other anterior mediastinal tumors, including thymic carcinoma and more aggressive thymoma subtypes.
Conclusion
Metaplastic thymoma can present as a purely epithelioid lesion on limited biopsy material,
obscuring its hallmark biphasic nature. Awareness of this rare thymic neoplasm and correlation with resection
findings are essential to avoid misdiagnosis. When accurately identified and completely excised, metaplastic
thymoma carries an excellent prognosis.
Biopsy, Fine-Needle
;
Thymoma
2.Risk scoring of African swine fever transmission in selected provinces of the Philippines
John Michael G. BERNARDO ; Aaron Paul R. SERDEÑA ; Gladys Maria V. PANGGA ; Saubel Ezrael A. SALAMAT ; Trisha Nicole AGULTO ; Cherry P. FERNANDEZ-COLORADO
Journal of Veterinary Science 2025;26(1):e2-
Objective:
Using semiquantitative risk scoring, this study estimated the probability of ASF transmission in 23 selected provinces.
Methods:
The factors influencing ASF spread were identified; 10 through a literature review and the positivity for ASF virus (ASFv) of meat samples from an ongoing surveillance study.Secondary data from each sampled province were collected, and the provinces were scored across these factors and classified into one of three risk categories.
Results:
Six out of 23 provinces were categorized as high-risk due to the high number of ASFv-positive meat samples, backyard pigs, and ASF occurrences. Conversely, four provinces were classified as low-risk due to consistently low scores across all indicators. The difference in the meat contamination level between low- and high-risk provinces emphasizes the importance of including this factor in the ASF spread assessment.
Conclusions
and Relevance: Risk estimation of ASF transmission must consider meat sample contamination. Active surveillance at local borders can monitor contamination and prevent ASFv sources from entering areas. This approach allows the government to allocate resources and prioritize higher-risk areas.
3.International Severe Asthma Registry (ISAR): 2017–2024 Status and Progress Update
Désirée LARENAS-LINNEMANN ; Chin Kook RHEE ; Alan ALTRAJA ; John BUSBY ; Trung N. TRAN ; Eileen WANG ; Todor A. POPOV ; Patrick D. MITCHELL ; Paul E. PFEFFER ; Roy Alton PLEASANTS ; Rohit KATIAL ; Mariko Siyue KOH ; Arnaud BOURDIN ; Florence SCHLEICH ; Jorge MÁSPERO ; Mark HEW ; Matthew J. PETERS ; David J. JACKSON ; George C. CHRISTOFF ; Luis PEREZ-DE-LLANO ; Ivan CHERREZ- OJEDA ; João A. FONSECA ; Richard W. COSTELLO ; Carlos A. TORRES-DUQUE ; Piotr KUNA ; Andrew N. MENZIES-GOW ; Neda STJEPANOVIC ; Peter G. GIBSON ; Paulo Márcio PITREZ ; Celine BERGERON ; Celeste M. PORSBJERG ; Camille TAILLÉ ; Christian TAUBE ; Nikolaos G. PAPADOPOULOS ; Andriana I. PAPAIOANNOU ; Sundeep SALVI ; Giorgio Walter CANONICA ; Enrico HEFFLER ; Takashi IWANAGA ; Mona S. AL-AHMAD ; Sverre LEHMANN ; Riyad AL-LEHEBI ; Borja G. COSIO ; Diahn-Warng PERNG ; Bassam MAHBOUB ; Liam G. HEANEY ; Pujan H. PATEL ; Njira LUGOGO ; Michael E. WECHSLER ; Lakmini BULATHSINHALA ; Victoria CARTER ; Kirsty FLETTON ; David L. NEIL ; Ghislaine SCELO ; David B. PRICE
Tuberculosis and Respiratory Diseases 2025;88(2):193-215
The International Severe Asthma Registry (ISAR) was established in 2017 to advance the understanding of severe asthma and its management, thereby improving patient care worldwide. As the first global registry for adults with severe asthma, ISAR enabled individual registries to standardize and pool their data, creating a comprehensive, harmonized dataset with sufficient statistical power to address key research questions and knowledge gaps. Today, ISAR is the largest repository of real-world data on severe asthma, curating data on nearly 35,000 patients from 28 countries worldwide, and has become a leading contributor to severe asthma research. Research using ISAR data has provided valuable insights on the characteristics of severe asthma, its burdens and risk factors, real-world treatment effectiveness, and barriers to specialist care, which are collectively informing improved asthma management. Besides changing clinical thinking via research, ISAR aims to advance real-world practice through initiatives that improve registry data quality and severe asthma care. In 2024, ISAR refined essential research variables to enhance data quality and launched a web-based data acquisition and reporting system (QISAR), which integrates data collection with clinical consultations and enables longitudinal data tracking at patient, center, and population levels. Quality improvement priorities include collecting standardized data during consultations and tracking and optimizing patient journeys via QISAR and integrating primary/secondary care pathways to expedite specialist severe asthma management and facilitate clinical trial recruitment. ISAR envisions a future in which timely specialist referral and initiation of biologic therapy can obviate long-term systemic corticosteroid use and enable more patients to achieve remission.
4.International Severe Asthma Registry (ISAR): 2017–2024 Status and Progress Update
Désirée LARENAS-LINNEMANN ; Chin Kook RHEE ; Alan ALTRAJA ; John BUSBY ; Trung N. TRAN ; Eileen WANG ; Todor A. POPOV ; Patrick D. MITCHELL ; Paul E. PFEFFER ; Roy Alton PLEASANTS ; Rohit KATIAL ; Mariko Siyue KOH ; Arnaud BOURDIN ; Florence SCHLEICH ; Jorge MÁSPERO ; Mark HEW ; Matthew J. PETERS ; David J. JACKSON ; George C. CHRISTOFF ; Luis PEREZ-DE-LLANO ; Ivan CHERREZ- OJEDA ; João A. FONSECA ; Richard W. COSTELLO ; Carlos A. TORRES-DUQUE ; Piotr KUNA ; Andrew N. MENZIES-GOW ; Neda STJEPANOVIC ; Peter G. GIBSON ; Paulo Márcio PITREZ ; Celine BERGERON ; Celeste M. PORSBJERG ; Camille TAILLÉ ; Christian TAUBE ; Nikolaos G. PAPADOPOULOS ; Andriana I. PAPAIOANNOU ; Sundeep SALVI ; Giorgio Walter CANONICA ; Enrico HEFFLER ; Takashi IWANAGA ; Mona S. AL-AHMAD ; Sverre LEHMANN ; Riyad AL-LEHEBI ; Borja G. COSIO ; Diahn-Warng PERNG ; Bassam MAHBOUB ; Liam G. HEANEY ; Pujan H. PATEL ; Njira LUGOGO ; Michael E. WECHSLER ; Lakmini BULATHSINHALA ; Victoria CARTER ; Kirsty FLETTON ; David L. NEIL ; Ghislaine SCELO ; David B. PRICE
Tuberculosis and Respiratory Diseases 2025;88(2):193-215
The International Severe Asthma Registry (ISAR) was established in 2017 to advance the understanding of severe asthma and its management, thereby improving patient care worldwide. As the first global registry for adults with severe asthma, ISAR enabled individual registries to standardize and pool their data, creating a comprehensive, harmonized dataset with sufficient statistical power to address key research questions and knowledge gaps. Today, ISAR is the largest repository of real-world data on severe asthma, curating data on nearly 35,000 patients from 28 countries worldwide, and has become a leading contributor to severe asthma research. Research using ISAR data has provided valuable insights on the characteristics of severe asthma, its burdens and risk factors, real-world treatment effectiveness, and barriers to specialist care, which are collectively informing improved asthma management. Besides changing clinical thinking via research, ISAR aims to advance real-world practice through initiatives that improve registry data quality and severe asthma care. In 2024, ISAR refined essential research variables to enhance data quality and launched a web-based data acquisition and reporting system (QISAR), which integrates data collection with clinical consultations and enables longitudinal data tracking at patient, center, and population levels. Quality improvement priorities include collecting standardized data during consultations and tracking and optimizing patient journeys via QISAR and integrating primary/secondary care pathways to expedite specialist severe asthma management and facilitate clinical trial recruitment. ISAR envisions a future in which timely specialist referral and initiation of biologic therapy can obviate long-term systemic corticosteroid use and enable more patients to achieve remission.
5.International Severe Asthma Registry (ISAR): 2017–2024 Status and Progress Update
Désirée LARENAS-LINNEMANN ; Chin Kook RHEE ; Alan ALTRAJA ; John BUSBY ; Trung N. TRAN ; Eileen WANG ; Todor A. POPOV ; Patrick D. MITCHELL ; Paul E. PFEFFER ; Roy Alton PLEASANTS ; Rohit KATIAL ; Mariko Siyue KOH ; Arnaud BOURDIN ; Florence SCHLEICH ; Jorge MÁSPERO ; Mark HEW ; Matthew J. PETERS ; David J. JACKSON ; George C. CHRISTOFF ; Luis PEREZ-DE-LLANO ; Ivan CHERREZ- OJEDA ; João A. FONSECA ; Richard W. COSTELLO ; Carlos A. TORRES-DUQUE ; Piotr KUNA ; Andrew N. MENZIES-GOW ; Neda STJEPANOVIC ; Peter G. GIBSON ; Paulo Márcio PITREZ ; Celine BERGERON ; Celeste M. PORSBJERG ; Camille TAILLÉ ; Christian TAUBE ; Nikolaos G. PAPADOPOULOS ; Andriana I. PAPAIOANNOU ; Sundeep SALVI ; Giorgio Walter CANONICA ; Enrico HEFFLER ; Takashi IWANAGA ; Mona S. AL-AHMAD ; Sverre LEHMANN ; Riyad AL-LEHEBI ; Borja G. COSIO ; Diahn-Warng PERNG ; Bassam MAHBOUB ; Liam G. HEANEY ; Pujan H. PATEL ; Njira LUGOGO ; Michael E. WECHSLER ; Lakmini BULATHSINHALA ; Victoria CARTER ; Kirsty FLETTON ; David L. NEIL ; Ghislaine SCELO ; David B. PRICE
Tuberculosis and Respiratory Diseases 2025;88(2):193-215
The International Severe Asthma Registry (ISAR) was established in 2017 to advance the understanding of severe asthma and its management, thereby improving patient care worldwide. As the first global registry for adults with severe asthma, ISAR enabled individual registries to standardize and pool their data, creating a comprehensive, harmonized dataset with sufficient statistical power to address key research questions and knowledge gaps. Today, ISAR is the largest repository of real-world data on severe asthma, curating data on nearly 35,000 patients from 28 countries worldwide, and has become a leading contributor to severe asthma research. Research using ISAR data has provided valuable insights on the characteristics of severe asthma, its burdens and risk factors, real-world treatment effectiveness, and barriers to specialist care, which are collectively informing improved asthma management. Besides changing clinical thinking via research, ISAR aims to advance real-world practice through initiatives that improve registry data quality and severe asthma care. In 2024, ISAR refined essential research variables to enhance data quality and launched a web-based data acquisition and reporting system (QISAR), which integrates data collection with clinical consultations and enables longitudinal data tracking at patient, center, and population levels. Quality improvement priorities include collecting standardized data during consultations and tracking and optimizing patient journeys via QISAR and integrating primary/secondary care pathways to expedite specialist severe asthma management and facilitate clinical trial recruitment. ISAR envisions a future in which timely specialist referral and initiation of biologic therapy can obviate long-term systemic corticosteroid use and enable more patients to achieve remission.
6.Risk scoring of African swine fever transmission in selected provinces of the Philippines
John Michael G. BERNARDO ; Aaron Paul R. SERDEÑA ; Gladys Maria V. PANGGA ; Saubel Ezrael A. SALAMAT ; Trisha Nicole AGULTO ; Cherry P. FERNANDEZ-COLORADO
Journal of Veterinary Science 2025;26(1):e2-
Objective:
Using semiquantitative risk scoring, this study estimated the probability of ASF transmission in 23 selected provinces.
Methods:
The factors influencing ASF spread were identified; 10 through a literature review and the positivity for ASF virus (ASFv) of meat samples from an ongoing surveillance study.Secondary data from each sampled province were collected, and the provinces were scored across these factors and classified into one of three risk categories.
Results:
Six out of 23 provinces were categorized as high-risk due to the high number of ASFv-positive meat samples, backyard pigs, and ASF occurrences. Conversely, four provinces were classified as low-risk due to consistently low scores across all indicators. The difference in the meat contamination level between low- and high-risk provinces emphasizes the importance of including this factor in the ASF spread assessment.
Conclusions
and Relevance: Risk estimation of ASF transmission must consider meat sample contamination. Active surveillance at local borders can monitor contamination and prevent ASFv sources from entering areas. This approach allows the government to allocate resources and prioritize higher-risk areas.
7.Risk scoring of African swine fever transmission in selected provinces of the Philippines
John Michael G. BERNARDO ; Aaron Paul R. SERDEÑA ; Gladys Maria V. PANGGA ; Saubel Ezrael A. SALAMAT ; Trisha Nicole AGULTO ; Cherry P. FERNANDEZ-COLORADO
Journal of Veterinary Science 2025;26(1):e2-
Objective:
Using semiquantitative risk scoring, this study estimated the probability of ASF transmission in 23 selected provinces.
Methods:
The factors influencing ASF spread were identified; 10 through a literature review and the positivity for ASF virus (ASFv) of meat samples from an ongoing surveillance study.Secondary data from each sampled province were collected, and the provinces were scored across these factors and classified into one of three risk categories.
Results:
Six out of 23 provinces were categorized as high-risk due to the high number of ASFv-positive meat samples, backyard pigs, and ASF occurrences. Conversely, four provinces were classified as low-risk due to consistently low scores across all indicators. The difference in the meat contamination level between low- and high-risk provinces emphasizes the importance of including this factor in the ASF spread assessment.
Conclusions
and Relevance: Risk estimation of ASF transmission must consider meat sample contamination. Active surveillance at local borders can monitor contamination and prevent ASFv sources from entering areas. This approach allows the government to allocate resources and prioritize higher-risk areas.
8.International Severe Asthma Registry (ISAR): 2017–2024 Status and Progress Update
Désirée LARENAS-LINNEMANN ; Chin Kook RHEE ; Alan ALTRAJA ; John BUSBY ; Trung N. TRAN ; Eileen WANG ; Todor A. POPOV ; Patrick D. MITCHELL ; Paul E. PFEFFER ; Roy Alton PLEASANTS ; Rohit KATIAL ; Mariko Siyue KOH ; Arnaud BOURDIN ; Florence SCHLEICH ; Jorge MÁSPERO ; Mark HEW ; Matthew J. PETERS ; David J. JACKSON ; George C. CHRISTOFF ; Luis PEREZ-DE-LLANO ; Ivan CHERREZ- OJEDA ; João A. FONSECA ; Richard W. COSTELLO ; Carlos A. TORRES-DUQUE ; Piotr KUNA ; Andrew N. MENZIES-GOW ; Neda STJEPANOVIC ; Peter G. GIBSON ; Paulo Márcio PITREZ ; Celine BERGERON ; Celeste M. PORSBJERG ; Camille TAILLÉ ; Christian TAUBE ; Nikolaos G. PAPADOPOULOS ; Andriana I. PAPAIOANNOU ; Sundeep SALVI ; Giorgio Walter CANONICA ; Enrico HEFFLER ; Takashi IWANAGA ; Mona S. AL-AHMAD ; Sverre LEHMANN ; Riyad AL-LEHEBI ; Borja G. COSIO ; Diahn-Warng PERNG ; Bassam MAHBOUB ; Liam G. HEANEY ; Pujan H. PATEL ; Njira LUGOGO ; Michael E. WECHSLER ; Lakmini BULATHSINHALA ; Victoria CARTER ; Kirsty FLETTON ; David L. NEIL ; Ghislaine SCELO ; David B. PRICE
Tuberculosis and Respiratory Diseases 2025;88(2):193-215
The International Severe Asthma Registry (ISAR) was established in 2017 to advance the understanding of severe asthma and its management, thereby improving patient care worldwide. As the first global registry for adults with severe asthma, ISAR enabled individual registries to standardize and pool their data, creating a comprehensive, harmonized dataset with sufficient statistical power to address key research questions and knowledge gaps. Today, ISAR is the largest repository of real-world data on severe asthma, curating data on nearly 35,000 patients from 28 countries worldwide, and has become a leading contributor to severe asthma research. Research using ISAR data has provided valuable insights on the characteristics of severe asthma, its burdens and risk factors, real-world treatment effectiveness, and barriers to specialist care, which are collectively informing improved asthma management. Besides changing clinical thinking via research, ISAR aims to advance real-world practice through initiatives that improve registry data quality and severe asthma care. In 2024, ISAR refined essential research variables to enhance data quality and launched a web-based data acquisition and reporting system (QISAR), which integrates data collection with clinical consultations and enables longitudinal data tracking at patient, center, and population levels. Quality improvement priorities include collecting standardized data during consultations and tracking and optimizing patient journeys via QISAR and integrating primary/secondary care pathways to expedite specialist severe asthma management and facilitate clinical trial recruitment. ISAR envisions a future in which timely specialist referral and initiation of biologic therapy can obviate long-term systemic corticosteroid use and enable more patients to achieve remission.
9.Professional quality of life and workplace psychosocial support interventions among nurses in the Philippines during the COVID-19 pandemic
Johan Y. Castillejos ; Danica May O. Cañ ; on ; Rupert I. Estor ; Marian Danille C. Santillan ; John Vian C. Villaluz ; Vivien Fe F. Fadrilan-camacho ; Paul Michael R. Hernandez
Acta Medica Philippina 2025;59(4):42-55
BACKGROUND AND OBJECTIVE
Nurses comprise the majority of the health workforce in the Philippines. Previous studies revealed that nurses manifest negative mental health outcomes exacerbated by COVID-19 pandemic. This study aims to determine the Professional Quality of Life (ProQOL) of nurses in the Philippines and their workplace psychosocial support interventions during the pandemic. The ProQOL measures compassion satisfaction (CS), burnout (BO), and secondary traumatic stress (STS).
METHODSA self-administered online questionnaire was disseminated by the Philippine Nurses Association, Inc. to affiliated nurses via email and Facebook posts. Out of 713 responses, 239 were eligible with their data analyzed using t-test, one-way ANOVA, and post hoc pairwise multiple comparisons.
RESULTSRespondents were found to have high CS (41.95 [SD 5.97]), moderate BO (23.56 [SD 6.07]), and moderate STS (26.62 [SD 8.18]). The most reported intervention was policies on confidentiality of workers’ mental health (84.94%) while the least reported was community engagements under the hospital’s mental health program (61.51%). ProQOL scores significantly differed in CS by age (p=0.011), position (p=0.044) and monthly income (p=0.016), BO by age (p=0.001) and years with current employer (p=0.009), and STS by region (p=0.017) and area of assignment (p=0.015). The existence of interventions yielded significant increase in CS and decrease in BO scores.
CONCLUSIONNurses in the Philippines exhibit high and favorable ProQOL during the pandemic. The majority of respondents reported the presence of workplace interventions which yield significant differences in CS and BO. The findings highlight the importance of workplace psychosocial support interventions and the need to strengthen implementation.
Human ; Nurses ; Quality Of Life ; Psychosocial Intervention ; Occupational Health ; Covid-19 Pandemic ; Covid-19
10.Comparison of the surgical outcomes of minimal incision and elliptical excision in treating epidermal inclusion cysts: A single-center, randomized controlled trial
John Michael A. Ramos ; Tetsuya Jumi B. Makino ; Charlene Marie U. Ang-Tiu ; Maria Franchesca Quino-Calayag
Journal of the Philippine Medical Association 2025;103(2):64-78
INTRODUCTION
Epidermal inclusion cysts require surgical intervention to prevent recurrence and symptoms. Elliptical excision is definitive but results in longer scar, while minimal incision techniques offer better cosmetic outcomes despite higher recurrence rates probably due to incomplete excision. To date, there are currently no local studies published.
METHODOLOGYA randomized controlled trial was conducted from October 2023 to May 2024 at a dermatology center in the Philippines. Patients were randomly assigned to minimal incision or elliptical excision techniques. Key metrics included operation time, scar length, post-operative complications, Hollander wound evaluation score (HWES), and histopathological completeness of excision.
RESULTSMedian operation duration was 31.86 minutes, with no significant difference between techniques (p = 0.5795). Post-operative scars were longer in the excision group (mean: 2.38 ± 0.66 cm) versus the minimal incision group (p < 0.001). Completeness of excision was higher in the excision group (83%) compared to the minimal incision group (27%) (p = 0.0123). Follow-up scar length was shorter in the minimal incision group (mean: 0.44 ± 0.21 cm) versus the excision group (mean: 2.1 ± 0.63 cm) (p < 0.001). HWES scores showed no significant difference in wound healing and aesthetic satisfaction.
CONCLUSIONMinimal incision technique results in shorter scars but lower completeness of excision compared to elliptical excision. Both techniques have similar long-term outcomes in wound healing and aesthetic satisfaction, with no recurrences or complications beyond two weeks. The choice should balance scar length and completeness of cyst removal, considering patient-specific factors.
Human ; Cicatrix ; Cysts ; Cosmetics


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