2024
Pitfalls of PRAME Immunohistochemistry in a Large Series of Melanocytic and Nonmelanocytic Lesions With Literature Review
Turner N, Ko C, McNiff J, Galan A. Pitfalls of PRAME Immunohistochemistry in a Large Series of Melanocytic and Nonmelanocytic Lesions With Literature Review. American Journal Of Dermatopathology 2024, 46: 21-30. PMID: 37982498, DOI: 10.1097/dad.0000000000002584.Peer-Reviewed Original ResearchConceptsConventional malignant melanomaMalignant melanomaPRAME immunohistochemistryBorderline lesionsNonmelanocytic lesionsDysplastic neviAmerican Joint CommitteePathological tumor stageMalignant melanocytic proliferationsBanal melanocytic nevusUlceration statusInstitution experienceBreslow depthMean ageTumor stageClinicopathologic correlationConsecutive casesMale genderAtypical fibroxanthomaSevere atypiaJoint CommitteeLarge seriesAmbiguous melanocytic lesionsMelanocytic proliferationMalignant counterparts
2023
IRF8 in Conjunction With CD123 and CD20 to Distinguish Lupus Erythematosus Panniculitis From Subcutaneous Panniculitis-like T-Cell Lymphoma
Wong J, Roy S, McNiff J, Xu M. IRF8 in Conjunction With CD123 and CD20 to Distinguish Lupus Erythematosus Panniculitis From Subcutaneous Panniculitis-like T-Cell Lymphoma. The American Journal Of Surgical Pathology 2023, 47: 1425-1431. PMID: 37767989, DOI: 10.1097/pas.0000000000002133.Peer-Reviewed Original ResearchConceptsSubcutaneous panniculitis-like T-cell lymphomaLupus erythematosus panniculitisPanniculitis-like T-cell lymphomaCase of SPTCLT-cell lymphomaPlasmacytoid dendritic cell differentiationPlasmacytoid dendritic cellsExpression of IRF8Dendritic cell differentiationCharacteristic curve analysisImportant clinical implicationsRegulatory factor 8Dendritic cellsCutaneous biopsyLymphoid aggregatesDiagnostic challengeImmunohistochemical panelImmunohistochemical expressionCD123CD20Distinct patientsClinical implicationsSubcutaneous fatDiagnostic testsPositive markersHIF-1 regulates pathogenic cytotoxic T cells in lupus skin disease
Little A, Chen P, Vesely M, Khan R, Fiedler J, Garritano J, Islam F, McNiff J, Craft J. HIF-1 regulates pathogenic cytotoxic T cells in lupus skin disease. JCI Insight 2023, 8: e166076. PMID: 37526979, PMCID: PMC10543720, DOI: 10.1172/jci.insight.166076.Peer-Reviewed Original ResearchConceptsCutaneous lupus erythematosusLupus skin diseaseT cellsSkin diseasesCytotoxic signatureInflammatory infiltrateHIF-1Tissue damageKidney-infiltrating T cellsSkin-infiltrating T cellsAutoimmune skin diseaseHIF-1 inhibitionSkin tissue damageLupus erythematosusSystemic diseaseTissue inflammationGranzyme BMouse modelInflammatory gene programDiseaseProtein levelsInfiltratesSkin environmentGene programPresent studyAssociation of Somatic ATP2A2 Damaging Variants With Grover Disease
Seli D, Ellis K, Goldust M, Shah K, Hu R, Zhou J, McNiff J, Choate K. Association of Somatic ATP2A2 Damaging Variants With Grover Disease. JAMA Dermatology 2023, 159: 745-749. PMID: 37195706, PMCID: PMC10193258, DOI: 10.1001/jamadermatol.2023.1139.Peer-Reviewed Original ResearchConceptsGrover's diseaseGD tissuesSomatic single nucleotide variantsControl tissuesRetrospective case seriesCase series studyAnnotation-dependent depletion scoreConsecutive patientsCase seriesKidney failureHistopathologic findingsAcantholytic disordersOrgan transplantationMAIN OUTCOMEBiopsy tissueSeries studyDarier's diseaseClinical diagnosisParticipant's DNAOlder individualsTissue DNADiseaseDisordersPatientsBiopsyIRF8 may be a useful marker for blastic plasmacytoid dendritic cell neoplasm, especially with weak CD123 expression
Tang H, Panse G, Braddock D, Perincheri S, Xu M, McNiff J. IRF8 may be a useful marker for blastic plasmacytoid dendritic cell neoplasm, especially with weak CD123 expression. Journal Of Cutaneous Pathology 2023, 50: 595-600. PMID: 37082914, DOI: 10.1111/cup.14439.Peer-Reviewed Original ResearchConceptsBlastic plasmacytoid dendritic cell neoplasmPlasmacytoid dendritic cell neoplasmDendritic cell neoplasmPunch biopsy specimenBiopsy specimenCell neoplasmsCase of BPDCNUseful markerTumor cellsTCL-1 expressionAtypical mononuclear cellsBone marrow involvementDiffuse dermal infiltrateDendritic cell lineagePotential diagnostic pitfallRegulatory factor 8TCL-1BPDCN casesCD123 expressionMarrow involvementDermal infiltrateCutaneous nodulesMyelodysplastic syndromeSkin nodulesMononuclear cellsPRAME immunohistochemistry can distinguish melanocytic pseudonests of lichenoid reactions from melanoma in situ
Roy S, Panse G, McNiff J. PRAME immunohistochemistry can distinguish melanocytic pseudonests of lichenoid reactions from melanoma in situ. Journal Of Cutaneous Pathology 2023, 50: 450-454. PMID: 36789669, DOI: 10.1111/cup.14407.Peer-Reviewed Original Research
2022
Interface change in early mycosis fungoides: A potential mimicker of benign dermatoses
Tsang M, McNiff J. Interface change in early mycosis fungoides: A potential mimicker of benign dermatoses. Journal Of Cutaneous Pathology 2022, 50: 266-274. PMID: 36444501, DOI: 10.1111/cup.14369.Peer-Reviewed Original ResearchConceptsConnective tissue diseaseEarly mycosis fungoidesMycosis fungoidesInterface dermatitisEarly biopsy specimensPapillary dermal fibrosisPatch-stage diseaseLymphocyte atypiaEarly biopsyRepeat biopsyHistopathologic featuresInflammatory dermatosesPotential mimickersTissue diseaseDefinitive diagnosisLichenoid patternBenign dermatosesBiopsy specimensClinicopathologic correlationDermal-epidermal junctionHistopathologic evolutionAncillary studiesBenign diagnosisDermal fibrosisHistopathologic cluesInguinal patch in mpox (monkeypox) virus infection and eccrine syringometaplasia: report of two cases with in situ hybridization and electron microscopy findings
Roy S, Sarhan J, Liu X, Murphy M, Bunick C, Choate K, Damsky W, McNiff J. Inguinal patch in mpox (monkeypox) virus infection and eccrine syringometaplasia: report of two cases with in situ hybridization and electron microscopy findings. British Journal Of Dermatology 2022, 188: 574-576. PMID: 36763786, DOI: 10.1093/bjd/ljac146.Peer-Reviewed Original ResearchConceptsVirus infectionUnusual clinical findingsElectron microscopy findingsEccrine epitheliumSquamous syringometaplasiaClinical findingsSitu hybridizationEccrine ductsMicroscopy findingsSyringometaplasiaUltrastructural characteristicsInfectionViral mRNAsFindingsPatientsHistopathologicalDiseaseEpitheliumNot all well-differentiated cutaneous squamous cell carcinomas are equal: Tumors with disparate biologic behavior have differences in protein expression via digital spatial profiling
Vesely M, Martinez-Morilla S, Gehlhausen JR, McNiff JM, Whang PG, Rimm D, Ko CJ. Not all well-differentiated cutaneous squamous cell carcinomas are equal: Tumors with disparate biologic behavior have differences in protein expression via digital spatial profiling. Journal Of The American Academy Of Dermatology 2022, 87: 695-698. PMID: 35398219, DOI: 10.1016/j.jaad.2022.03.057.Peer-Reviewed Original Research
2021
Clustered intraepidermal lymphocytes and Langerhans cell microgranulomas are consistently observed in hyperkeratotic palmoplantar eczema compared with palmoplantar psoriasis and mycosis fungoides palmaris et plantaris
Kim SR, McNiff JM, Ko CJ. Clustered intraepidermal lymphocytes and Langerhans cell microgranulomas are consistently observed in hyperkeratotic palmoplantar eczema compared with palmoplantar psoriasis and mycosis fungoides palmaris et plantaris. Journal Of The American Academy Of Dermatology 2021, 87: 884-886. PMID: 34883152, DOI: 10.1016/j.jaad.2021.11.057.Peer-Reviewed Original ResearchCutaneous involvement by plasma cell myeloma with aberrant CD4 expression
Li P, Panse G, Singh S, Krivda SJ, McNiff JM. Cutaneous involvement by plasma cell myeloma with aberrant CD4 expression. Journal Of Cutaneous Pathology 2021, 49: 921-924. PMID: 36222211, DOI: 10.1111/cup.14141.Peer-Reviewed Original ResearchEpidermotropic metastasis of squamous cell carcinoma of the tonsil: A case report with molecular confirmation
Li P, Barbieri A, Walther Z, McNiff J, Panse G. Epidermotropic metastasis of squamous cell carcinoma of the tonsil: A case report with molecular confirmation. Journal Of Cutaneous Pathology 2021, 48: 1514-1519. PMID: 34302376, DOI: 10.1111/cup.14108.Peer-Reviewed Case Reports and Technical NotesConceptsSquamous cell carcinomaOropharyngeal squamous cell carcinomaCell carcinomaDe novo squamous cell carcinomaPrimary oropharyngeal squamous cell carcinomaTonsillar squamous cell carcinomaTargetable genetic aberrationsLesion biopsy specimensSkin biopsy specimenSkin lesion biopsy specimensMetastatic diseaseEpidermal involvementEpidermotropic metastasesMetastatic lesionsPoor prognosisBiopsy specimenCase reportClinical historyBiopsy specimensSecondary diseaseSkin lesionsTumor originMetastatic specimensMetastasisNeck skinGeneralized eczematous reactions to the Pfizer‐BioNTech COVID‐19 vaccine
Leasure A, Cowper S, McNiff J, Cohen J. Generalized eczematous reactions to the Pfizer‐BioNTech COVID‐19 vaccine. Journal Of The European Academy Of Dermatology And Venereology 2021, 35: e716-e717. PMID: 34236729, PMCID: PMC8447468, DOI: 10.1111/jdv.17494.Peer-Reviewed Case Reports and Technical NotesNew bullous lesions in a 72-year-old woman
Mendoza H, Goodwin J, Gehlhausen J, Odell I, McNiff J, Gnanapandithan K. New bullous lesions in a 72-year-old woman. Cleveland Clinic Journal Of Medicine 2021, 88: 319-324. PMID: 34078615, DOI: 10.3949/ccjm.88a.20180.Peer-Reviewed Case Reports and Technical NotesLeukocytoclastic Vasculitis and Microvascular Occlusion Key Concepts for the Working Pathologist
Ko CJ, Gehlhausen JR, McNiff JM. Leukocytoclastic Vasculitis and Microvascular Occlusion Key Concepts for the Working Pathologist. Surgical Pathology Clinics 2021, 14: 309-325. PMID: 34023108, DOI: 10.1016/j.path.2021.01.006.Peer-Reviewed Original ResearchConceptsLeukocytoclastic vasculitisMicrovascular occlusionSmall vessel leukocytoclastic vasculitisMedium-sized vesselsSame differential diagnosisBiopsy findingsDermal involvementSystemic diseaseCertain infectionsDifferential diagnosisVasculitisDepth of involvementClinical diagnosisOcclusionDiagnosisVessel sizeInvolvementVesselsSize of vesselsCalciphylaxisDesmoplastic Trichoepithelioma With Pseudocarcinomatous Hyperplasia: A Folliculosebaceous Neoplasm in Young Persons
Wang MZ, McNiff JM, McCalmont TH, LeBoit PE. Desmoplastic Trichoepithelioma With Pseudocarcinomatous Hyperplasia: A Folliculosebaceous Neoplasm in Young Persons. American Journal Of Dermatopathology 2021, 43: 788-793. PMID: 33899770, DOI: 10.1097/dad.0000000000001922.Peer-Reviewed Original ResearchConceptsDesmoplastic trichoepitheliomaCell carcinomaImmunohistochemical profileMorphoeic basal cell carcinomaSquamous cell carcinomaMicrocystic adnexal carcinomaBasal cell carcinomaFollicular germinative cellsMedian ageBer-EP4Clinical manifestationsAdnexal carcinomaMalignant neoplasmsFibrotic stromaBasaloid cellsEpidermal hyperplasiaPseudocarcinomatous hyperplasiaMerkel cellsSurface epitheliumAccurate diagnosisCarcinomaTrichoepitheliomaGerminative cellsBasal layerHyperplasiaA Histopathologic Scoring System for Perineural Invasion Correlates With Adverse Outcomes in Patients With Cutaneous Squamous Cell Carcinoma.
Totonchy MB, McNiff JM, Suozzi KC, Leffell DJ, Christensen SR. A Histopathologic Scoring System for Perineural Invasion Correlates With Adverse Outcomes in Patients With Cutaneous Squamous Cell Carcinoma. Dermatologic Surgery 2021, 47: 445-451. PMID: 33795563, DOI: 10.1097/dss.0000000000002923.Peer-Reviewed Original ResearchConceptsCutaneous squamous cell carcinomaPerineural invasionSquamous cell carcinomaAdverse outcomesNerve diameterHistopathologic featuresPNI scoreCell carcinomaExtratumoral perineural invasionRetrospective cohort studyCurrent staging systemHistopathologic scoring systemTumor-related deathNumber of nervesLogistic regression analysisMedian followNerve involvementCohort studyLocal recurrenceSurgical excisionStaging systemRisk factorsMedian numberHistopathologic slidesNerve structuresLichenoid dermatoses with pseudomelanocytic nests vs inflamed melanoma in situ: A comparative study
Panse G, McNiff JM. Lichenoid dermatoses with pseudomelanocytic nests vs inflamed melanoma in situ: A comparative study. Journal Of Cutaneous Pathology 2021, 48: 745-749. PMID: 33350494, DOI: 10.1111/cup.13945.Peer-Reviewed Original ResearchConceptsPseudomelanocytic nestsLichenoid dermatosesDermoepidermal junctionHistopathological featuresPagetoid scatterCytologic atypiaDifferent histopathological featuresSun-damaged skinSignificant cytologic atypiaLichenoid inflammationSolitary melanocytesLichenoid keratosisClinicopathological correlationBiopsy specimensNon-melanocytic lesionsDiagnostic pitfallsAtypical melanocytesDermatosesSingle melanocytesAtypiaMelanomaMelanocytesConfluent growthBenign process
2020
Discordant anti‐SARS‐CoV‐2 spike protein and RNA staining in cutaneous perniotic lesions suggests endothelial deposition of cleaved spike protein
Ko CJ, Harigopal M, Gehlhausen JR, Bosenberg M, McNiff JM, Damsky W. Discordant anti‐SARS‐CoV‐2 spike protein and RNA staining in cutaneous perniotic lesions suggests endothelial deposition of cleaved spike protein. Journal Of Cutaneous Pathology 2020, 48: 47-52. PMID: 32895985, DOI: 10.1111/cup.13866.Peer-Reviewed Original ResearchConceptsSARS-CoV-2 spike proteinCOVID toesEccrine epitheliumEndothelial cellsSkin biopsiesSpike proteinReverse transcriptase polymerase chain reaction testingSARS-CoV-2 antibodiesPolymerase chain reaction testingSARS-CoV-2 RNAPotential pathogenetic mechanismsPositive immunohistochemical labelingSARS-CoV-2Endothelial depositionPathogenetic mechanismsImmunohistochemical stainingReaction testingImmunohistochemical labelingEccrine glandsRNA ISHImmunohistochemistrySpike RNAGold standardTissue sectionsBiopsyPerniosis during the COVID‐19 pandemic: Negative anti‐SARS‐CoV‐2 immunohistochemistry in six patients and comparison to perniosis before the emergence of SARS‐CoV‐2
Ko CJ, Harigopal M, Damsky W, Gehlhausen JR, Bosenberg M, Patrignelli R, McNiff JM. Perniosis during the COVID‐19 pandemic: Negative anti‐SARS‐CoV‐2 immunohistochemistry in six patients and comparison to perniosis before the emergence of SARS‐CoV‐2. Journal Of Cutaneous Pathology 2020, 47: 997-1002. PMID: 32745281, PMCID: PMC7436569, DOI: 10.1111/cup.13830.Peer-Reviewed Original ResearchConceptsSARS-CoV-2 nucleocapsid proteinPerivascular lymphocytesImmunohistochemical stainingCOVID-19 pandemicSARS-CoV-2 immunohistochemistryNucleocapsid proteinSARS-CoV-2Inflammatory lesionsHistopathologic findingsIntravascular occlusionMicroscopic findingsPerniosisIntravascular materialLymphocytesLesionsPatientsStainingPandemicSuch casesCuffingHistopathologyCasesImmunohistochemistryFindingsProtein