{"title":"Spatial Localization of Eubacterial 16S rRNA in Early Pregnancy Placenta and Decidua.","authors":"Cornelia Thoeni, Jefferson Terry","doi":"10.1177/10935266231217629","DOIUrl":"10.1177/10935266231217629","url":null,"abstract":"<p><p>Bacteria derived from the maternal circulation have been suggested to seed the human placenta during pregnancy leading to development of an intrinsic placental microbiome; however, other data indicates these bacteria are artifactual contaminants. Limited research on the localization of bacteria in human placental tissue is available, which may help differentiate resident placental bacteria from contaminants. This study spatially localizes bacteria in situ in normal late first to early second trimester human placenta by 16S rRNA chromogenic in situ hybridization and demonstrates patterns consistent with both contaminants and intraparenchymal signals. These results suggest that placental microbiome studies may benefit from spatial strategies that can exclude surface contamination.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"132-138"},"PeriodicalIF":1.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138812763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Iván A González, Maire Conrad, Sarah Weinbrom, Trusha Patel, Judith R Kelsen, Pierre Russo
{"title":"Clinicopathologic Characterization of Lymphocytic Colitis in the Pediatric Population.","authors":"Iván A González, Maire Conrad, Sarah Weinbrom, Trusha Patel, Judith R Kelsen, Pierre Russo","doi":"10.1177/10935266231215117","DOIUrl":"10.1177/10935266231215117","url":null,"abstract":"<p><strong>Background: </strong>Lymphocytic colitis (LC) in the pediatric population has been associated with immune dysregulation.</p><p><strong>Methods: </strong>Single-center retrospective study of pediatric LC.</p><p><strong>Results: </strong>50 patients (35 female, 70%) with a median age of 12 years at diagnosis (interquartile range: 5.7-15.8) of LC were identified. At presentation, 11 patients (22%) had malnutrition, 16 (32%) had a known underlying immune dysregulation, 4 (8%) had celiac disease (CD), and none had a diagnosis of inflammatory bowel disease. The most common medications prior to diagnosis were non-steroidal anti-inflammatory drugs, proton pump inhibitor, and selective serotonin reuptake inhibitors (10% each). Colonic biopsies showed a median number of intraepithelial lymphocytes (IELs)/100 epithelial cells of 48 (range: 25-85), and only 10% of cases had neutrophilic cryptitis. Upper gastrointestinal tract findings included lymphocytic esophagitis (4%), and duodenal IELs without and with villous blunting (9% each) (n: 47). Ten patients (23%) had increased IELs in the terminal ileum (n: 43). Treatments including 5-ASA, budesonide, prednisone, and gluten-free diet improved symptoms in <50% of patients (n: 42), and all follow-up colonoscopies showed persistent LC (n: 13).</p><p><strong>Conclusion: </strong>Our study supports the association of LC with immune-mediated conditions, most commonly celiac disease. Symptomatic improvement was seen in <50% of patients with none of the patients with repeat colonoscopy showing histologic improvement.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"156-168"},"PeriodicalIF":1.3,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139075906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"#PediPath: Addressing Pediatric Pathology Recruitment Through Social Media and Other Online Platforms.","authors":"Casey P Schukow, Oscar F Lopez-Nunez","doi":"10.1177/10935266231221321","DOIUrl":"10.1177/10935266231221321","url":null,"abstract":"","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"205-206"},"PeriodicalIF":1.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139467159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yan Chen Wongworawat, Stephen F Sarabia, Martin Urbicain, Paola Francalanci, Pavel Sumazin, Rita Alaggio, Dolores H López-Terrada
{"title":"Molecular Profiling of a Hepatocellular Neoplasm Not Otherwise Specified (HCN-NOS) Demonstrates Distinct Molecular Features in Hepatoblastoma and HCC-Like Components.","authors":"Yan Chen Wongworawat, Stephen F Sarabia, Martin Urbicain, Paola Francalanci, Pavel Sumazin, Rita Alaggio, Dolores H López-Terrada","doi":"10.1177/10935266231204788","DOIUrl":"10.1177/10935266231204788","url":null,"abstract":"<p><p>Hepatoblastomas (HB) are embryonal tumors with quiet genomes diagnosed mostly in children under 3 years of age and often cured by surgical resection and chemotherapy. However, a subset of HBs behave aggressively, displaying characteristic histologic features and higher genomic instability. Hepatocellular neoplasm-not otherwise specified (HCN-NOS) is a provisional diagnostic category for tumors exhibiting either intermediate or a combination of both HB and hepatocellular carcinoma (HCC) histological features. In this study, we characterized an HCN-NOS diagnosed in a 3-year-old patient presenting with a liver mass, in which both HB and HCC histological components were amendable to macro-dissection and molecular profiling. The spectrum of mutations, copy number changes, mRNA, and protein expression profiles within these 2 histologically distinct tumor areas demonstrate molecular heterogeneity and suggest intratumoral clonal evolution of this hepatocellular <i>CTNNB</i>1-mutant lesion.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"169-175"},"PeriodicalIF":1.3,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11015706/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71415315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alfonso Tan-Garcia, York Tien Lee, Chik Hong Kuick, Shui Yen Soh, Kenneth Tou-En Chang, Khurshid Merchant
{"title":"Spontaneous Partial Regression of Fetal Lung Interstitial Tumor With <i>A2M::ALK</i> Rearrangement in a Neonate.","authors":"Alfonso Tan-Garcia, York Tien Lee, Chik Hong Kuick, Shui Yen Soh, Kenneth Tou-En Chang, Khurshid Merchant","doi":"10.1177/10935266231189929","DOIUrl":"10.1177/10935266231189929","url":null,"abstract":"<p><p>The differential diagnosis for neonatal primary lung masses includes developmental anomalies and congenital lung tumors. Fetal lung interstitial tumor (FLIT) is a rare benign mesenchymal lesion which presents either antenatally or within the first 3 months of age. FLIT is a circumscribed solid-cystic mass which histologically resembles the fetal lung during the canalicular stage at 20-24 weeks of gestation. It is composed of immature mesenchymal cells expanding the interstitium and irregular airspace-like structures. Of all published cases, only 1 identified an α2-macroglobulin (<i>A2M</i>)::anaplastic lymphoma kinase (<i>ALK</i>) fusion and all cases underwent surgical resection in the neonatal or infancy period. We present the second case of FLIT with an <i>A2M::ALK</i> fusion diagnosed postnatally in a neonate which partially regressed spontaneously during conservative management with interim resection at 39 months of age, and provide a review of the literature.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"187-192"},"PeriodicalIF":1.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41220357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fetal and Neonatal Autopsy in the Molecular Age: Exploring Tissue Selection for Testing Success.","authors":"Elizabeth S Doughty, Miriam D Post","doi":"10.1177/10935266231214880","DOIUrl":"10.1177/10935266231214880","url":null,"abstract":"<p><p>While conventional autopsy is the gold-standard for determining cause of demise in the fetal and neonatal population, molecular analysis is increasingly used as an ancillary tool. Testing methods and tissue selection should be optimized to provide informative genetic results. This institutional review compares testing modalities and postmortem tissue type in 53 demises occurring between 20 weeks of gestation and 28 days of life. Testing success, defined as completion of analysis, varies by technique and may require viable cells for culture or extractable nucleic acid. Success was achieved by microarray in 29/30 tests (96.7%), karyotype in 40/54 tests (74.1%), fluorescent in situ hybridization in 5/9 tests (55.6%), and focused gene panels in 2/2 tests (100%). With respect to tissue type, postmortem prepartum amniotic fluid was analyzed to completion in 100% of tests performed; compared to 84.0%, 54.5%, and 80.8% of tests using placenta, fetal only, and mixed fetal-placental tissue collection, respectively. Sampling skin (83.3%, in cases with minimal maceration) and kidney (75.0%) were often successful, compared to lower efficacy of umbilical cord (57.1%) and liver (25.0%). Addition of genetic testing into cases with anomalous clinical and gross findings can increase the utility of the final report for family counseling and future pregnancy planning.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"148-155"},"PeriodicalIF":1.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138812761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marie Das, Karen D Tsuchiya, Sandra D Bohling, Billy Davis, Samuel Hwang, Rebecca A Gardner, Karen M Chisholm
{"title":"How Many Tests Does It Take to Diagnose a Triple-Hit B-Lymphoblastic Lymphoma? (Hint, It's A Lot).","authors":"Marie Das, Karen D Tsuchiya, Sandra D Bohling, Billy Davis, Samuel Hwang, Rebecca A Gardner, Karen M Chisholm","doi":"10.1177/10935266231212337","DOIUrl":"10.1177/10935266231212337","url":null,"abstract":"<p><p>B-lymphoblastic leukemia/lymphoma (B-ALL/LBL) is a precursor B-cell neoplasm that often harbors specific cytogenetic/molecular abnormalities with distinctive clinical, phenotypic, and prognostic characteristics. Subcategorization of B-ALL/LBL therefore requires extensive cytogenetic and/or molecular testing to determine the appropriate classification and therapeutic interventions for these patients. Herein, we present a case of a 17-year-old young woman diagnosed with B-LBL harboring not only an <i>IGH::MYC</i> rearrangement but also <i>BCL2</i> and <i>BCL6</i> rearrangements (so-called \"triple-hit\") and somatic biallelic <i>TP53</i> inactivation. <i>MYC</i> rearrangements are relatively rare in B-ALL/LBL, and the identification of a \"triple-hit\" elicited an initial diagnostic dilemma. However, a multimodal approach allowed for the classification of this complex case and helped guide selection of an appropriate therapeutic regimen.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"193-197"},"PeriodicalIF":1.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138464458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sini Keskinen, Teija Paakkola, Mirjami Mattila, Marja Hietala, Hannele Koillinen, Jukka Laine, Maria K Haanpää
{"title":"Prenatal Coffin-Siris Syndrome: Expanding the Phenotypic and Genotypic Spectrum of the Disease.","authors":"Sini Keskinen, Teija Paakkola, Mirjami Mattila, Marja Hietala, Hannele Koillinen, Jukka Laine, Maria K Haanpää","doi":"10.1177/10935266231210155","DOIUrl":"10.1177/10935266231210155","url":null,"abstract":"<p><p>Coffin-Siris syndrome is an autosomal dominant disorder with neurological, cardiovascular, and gastrointestinal symptoms. Patients with Coffin-Siris syndrome typically have variable degree of developmental delay or intellectual disability, muscular hypotonia, dysmorphic facial features, sparse scalp hair, but otherwise hirsutism and fifth digit nail or distal phalanx hypoplasia or aplasia. Coffin-Siris syndrome is caused by pathogenic variants in 12 different genes including <i>SMARCB1</i> and <i>ARID1A</i>. Pathogenic <i>SMARCB1</i> gene variants cause Coffin-Siris syndrome 3 whereas pathogenic <i>ARID1A</i> gene variants cause Coffin-Siris syndrome 2. Here, we present two prenatal Coffin-Siris syndrome cases with autosomal dominant pathogenic variants: <i>SMARCB1</i> gene c.1066_1067del, p.(Leu356AspfsTer4) variant, and a novel <i>ARID1A</i> gene c.1920+3_1920+6del variant. The prenatal phenotype in Coffin-Siris syndrome has been rarely described. This article widens the phenotypic spectrum of prenatal Coffin-Siris syndrome with severely hypoplastic right ventricle with VSD and truncus arteriosus type III, persisting left superior and inferior caval vein, bilateral olfactory nerve aplasia, and hypoplastic thymus. A detailed clinical description of the patients with ultrasound, MRI, and <i>post mortem</i> pictures of the affected fetuses showing the wide phenotypic spectrum of the disease is presented.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"181-186"},"PeriodicalIF":1.9,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11015708/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138048813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mai He, Bofan He, Jinyi Weng, Jerry Q Cheng, Huanying Gu
{"title":"Manual and Semi-Automated Measurement and Calculation of Osteosarcoma Treatment Effect Using Whole Slide Image and Qupath.","authors":"Mai He, Bofan He, Jinyi Weng, Jerry Q Cheng, Huanying Gu","doi":"10.1177/10935266231207937","DOIUrl":"10.1177/10935266231207937","url":null,"abstract":"<p><strong>Introduction: </strong>In osteosarcoma, the most significant indicator of prognosis is the histologic changes related to tumor response to preoperative chemotherapy, such as necrosis. We have developed a method to measure the osteosarcoma treatment effect using whole slide image (WSI) with an open-source digital image analytical software Qupath.</p><p><strong>Materials and methods: </strong>In Qupath, each osteosarcoma case was treated as a project. All H&E slides from the entire representative slice of osteosarcoma were scanned into WSIs and imported into a project in Qupath. The regions of tumor and tumor necrosis were annotated, and their areas were measured in Qupath. In order to measure the osteosarcoma treatment effect, we needed to calculate the percentage of total necrosis area over total tumor area. We developed a tool that can automatically extract all values of tumor and necrosis areas from a Qupath project into an Excel file, sum these values for necrosis and whole tumor respectively, and calculate necrosis/tumor percentage.</p><p><strong>Conclusion: </strong>Our method that combines WSI with Qupath can provide an objective measurement to facilitate pathologist's assessment of osteosarcoma response to treatment. The proposed approach can also be used for other types of tumors that have clinical need for post-treatment response assessment.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"32-38"},"PeriodicalIF":1.9,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72016185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anastasia MacKeracher, Anthony Arnoldo, Robert Siddaway, Lea F Surrey, Gino R Somers
{"title":"The Incidence of Multiple Fusions in a Series of Pediatric Soft Tissue and Bone Tumors.","authors":"Anastasia MacKeracher, Anthony Arnoldo, Robert Siddaway, Lea F Surrey, Gino R Somers","doi":"10.1177/10935266231199928","DOIUrl":"10.1177/10935266231199928","url":null,"abstract":"<p><strong>Background: </strong>Next generation sequencing (NGS) has increased the detection of fusion genes in cancer. NGS has found multiple fusions in single tumor samples; however, the incidence of this in pediatric soft tissue and bone tumors (PSTBTs) is not well documented. The aim of this study is to catalogue the incidence of multiple fusions in a series of PSTBTs, and apply a modified gene fusion classification system to determine clinical relevance.</p><p><strong>Methodology: </strong>RNA from 78 bone and soft tissue tumors and 7 external quality assessment samples were sequenced and analyzed using recently-described Metafusion (MF) software and classified using a modification of previously-published schema for fusion classification into 3 tiers: 1, strong clinical significance; 2, potential clinical significance; and 3, unknown clinical significance.</p><p><strong>Results: </strong>One-hundred forty-five fusions were detected in 85 samples. Fifty-five samples (65%) had a single fusion and 30 (35%) had more than 1 fusion. No samples contained more than 1 tier 1 fusion. There were 40 tier 1 (28%), 36 tier 2 (24%), and 69 (48%) tier 3 fusions.</p><p><strong>Conclusions: </strong>A significant percentage of PSTBTs harbor more than 1 fusion, and by applying a modified fusion classification scheme, the potential clinical relevance of such fusions can be determined.</p>","PeriodicalId":54634,"journal":{"name":"Pediatric and Developmental Pathology","volume":" ","pages":"3-12"},"PeriodicalIF":1.9,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10800079/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41151366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}