Jennifer Ko
Project Director
Ob/Gyn, Reproductive Sciences
School of Medicine

Education & Training

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• Clinical Nutrition, B.S. College of Agriculture & Sciences University of California, Davis 2010

Publications (60)

Top publication keywords:
Oncogene Proteins, FusionMelanocytesSoft Tissue NeoplasmsSkin NeoplasmsCarcinoma, Merkel CellNevus, PigmentedHemangiosarcomaCyclin-Dependent Kinase Inhibitor p16Fluorescent Antibody Technique, DirectNerve Sheath NeoplasmsTripartite Motif ProteinsNevus, Epithelioid and Spindle CellNevusMelanomaSarcoma, Clear Cell

• Cutaneous crystal storing histiocytosis: A case series with review of literature.
  Journal of cutaneous pathology 2024 Homsi HA, Knapp C, Agrawal S, Bhavsar S, Ko JS, Billings SD, Ronen S
• The Impact of Next-generation Sequencing on Interobserver Agreement and Diagnostic Accuracy of Desmoplastic Melanocytic Neoplasms.
  The American journal of surgical pathology 2024 Chen A, Sharma N, Patel P, Olivares S, Bahrami A, Barnhill RL, Blokx WAM, Bosenberg M, Busam KJ, de La Fouchardière A, Duncan LM, Elder DE, Ko JS, Landman G, Lazar AJ, Lezcano C, Lowe L, Maher N, …
• Effectiveness and safety of telehealth medication abortion in the USA.
  Nature medicine 2024 Upadhyay UD, Koenig LR, Meckstroth K, Ko J, Valladares ES, Biggs MA
• MED15::ATF1-Rearranged Tumor: A Novel Cutaneous Tumor With Melanocytic Differentiation.
  Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 2024 Ko JS, Lemahieu J, Billings SD, Tirode F, Payton D, Boone B, Pissaloux D, de la Fouchardiere A
• Patient Acceptability of Telehealth Medication Abortion Care in the United States, 2021‒2022: A Cohort Study.
  American journal of public health 2024 Koenig LR, Ko J, Valladares ES, Coeytaux FM, Wells E, Lyles CR, Upadhyay UD

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• The Role of Telehealth in Promoting Equitable Abortion Access in the United States: Spatial Analysis.
  JMIR public health and surveillance 2023 Koenig LR, Becker A, Ko J, Upadhyay UD
• Subcutaneous Leiomyosarcoma: An Aggressive Malignancy Portending a Significant Risk of Metastasis and Death.
  The American journal of surgical pathology 2023 Bresler SC, Gosnell HL, Ko JS, Angeles CV, Ronen S, Billings SD, Patel RM
• Keratin-positive giant cell-rich tumors of soft tissue with HMGA2::NCOR2 fusions.
  Journal of cutaneous pathology 2023 Weigelt MA, Azzato EM, Habermehl GK, Billings SD, Ko JS, Fritchie KJ
• Nipple Adenoma: Clinicopathologic Characterization of 50 Cases.
  The American journal of surgical pathology 2023 Weigelt MA, Sciallis AP, McIntire PJ, Ko JS, Billings SD, Ronen S
• Primary cutaneous extraskeletal osteosarcoma: a series of 16 cases.
  Pathology 2022 Habeeb O, Weigelt MA, Goldblum JR, Ko JS, Habermehl G, Rubin BP, Billings SD
• Combined utility of p16 and BRAF V600E in the evaluation of spitzoid tumors: Superiority to PRAME and correlation with FISH.
  Journal of cutaneous pathology 2022 McAfee JL, Scarborough R, Jia XS, Azzato EM, Astbury C, Ronen S, Andea AA, Billings SD, Ko JS
• Superficial low-grade fibromyxoid sarcoma.
  Journal of cutaneous pathology 2022 Ronen S, Ko JS, Rubin BP, Kilpatrick SE, Wang WL, Lazar AJ, Goldblum JR, Billings SD
• The capillary lobule variant of radiation-associated angiosarcoma in the setting of breast cancer: A diagnostic pitfall.
  Journal of cutaneous pathology 2022 Agrawal S, Fritchie KJ, Fernandez AP, Ko JS, Bergfeld W, Rubin BP, Billings SD
• Cutaneous Melanocytic Tumor With CRTC1::TRIM11 Translocation : An Emerging Entity Analyzed in a Series of 41 Cases.
  The American journal of surgical pathology 2022 Hanna J, Ko JS, Billings SD, Boivin F, Beaudoux O, Pissaloux D, Tirode F, Laga A, Fletcher CDM, de la Fouchardiere A
• Rhabdomyosarcoma Arising in an Old Rhytidectomy Scar.
  The Annals of otology, rhinology, and laryngology 2022 Ruthberg JS, Meleca JB, Ko JS, Billings SD, Ku JA
• A clinicopathologic analysis of 54 cases of cutaneous myxoma.
  Human pathology 2021 Sharma A, Khaitan N, Ko JS, Bergfeld WF, Piliang M, Rubin BP, Goldblum JR, Billings SD
• Preferentially expressed antigen in melanoma and p16 expression in acral melanocytic neoplasms.
  Journal of cutaneous pathology 2021 McBride JD, McAfee JL, Piliang M, Bergfeld WF, Fernandez AP, Ronen S, Billings SD, Ko JS
• Cutaneous symplastic hemangioma: A series of four cases.
  Journal of cutaneous pathology 2021 Frew D, Scarborough R, Ko JS, Billings SD
• The clinicopathologic spectrum and genomic landscape of de-/trans-differentiated melanoma.
  Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 2021 Ferreira I, Droop A, Edwards O, Wong K, Harle V, Habeeb O, Gharpuray-Pandit D, Houghton J, Wiedemeyer K, Mentzel T, Billings SD, Ko JS, Füzesi L, Mulholland K, Prusac IK, Liegl-Atzwanger B, de Saint …
• Superficial ALK-rearranged myxoid spindle cell neoplasm: a cutaneous soft tissue tumor with distinctive morphology and immunophenotypic profile.
  Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 2021 Dermawan JK, Azzato EM, Goldblum JR, Rubin BP, Billings SD, Ko JS
• Update on Cutaneous Soft Tissue Tumors.
  Surgical pathology clinics 2021 Dermawan JK, Ko JS, Billings SD
• Perineuriomatous nevi: A series of eight cases highlighting unifying pathologic features to avoid misdiagnosis.
  Journal of cutaneous pathology 2021 McAfee JL, Dermawan JK, Billings SD, Ko JS
• Disease Progression in Cutaneous Squamous Cell Carcinoma Patients With Satellitosis and In-transit Metastasis.
  Anticancer research 2021 Smile TD, Xiong DX, Varra V, Winter IW, Beal BT, Gastman BR, Geiger JL, Adelstein DJ, Bergfeld WF, Piliang MP, Billings SD, Ko JS, Knackstedt TJ, Lucas JL, Poblete-Lopez CM, Meine JG, Vij A, Vidimos …
• EWSR1-SMAD3 rearranged fibroblastic tumor: Case series and review.
  Journal of cutaneous pathology 2020 Habeeb O, Korty KE, Azzato EM, Astbury C, Farkas DH, Ko JS, Billings SD
• Intravascular Lobular Capillary Hemangioma (Intravascular Pyogenic Granuloma): A Clinicopathologic Study of 40 Cases.
  The American journal of surgical pathology 2020 Dermawan JK, Ko JS, Billings SD
• Large sacral/buttocks ulcerations in the setting of coagulopathy: A case series establishing the skin as a target organ of significant damage and potential morbidity in patients with severe COVID-19.
  International wound journal 2020 Young S, Narang J, Kumar S, Kwizera E, Malik P, Billings SD, Ko JS, Fernandez AP
• p16 Range of expression in dermal predominant benign epithelioid and spindled nevi and melanoma.
  Journal of cutaneous pathology 2020 Oaxaca G, Billings SD, Ko JS
• Targeted next generation sequencing (NGS) to classify melanocytic neoplasms.
  Journal of cutaneous pathology 2020 Zarabi SK, Azzato EM, Tu ZJ, Ni Y, Billings SD, Arbesman J, Funchain P, Gastman B, Farkas DH, Ko JS
• Superficial sarcomas with CIC rearrangement are aggressive neoplasms: A series of eight cases.
  Journal of cutaneous pathology 2020 Ko JS, Marusic Z, Azzato EM, Farkas DH, Van Arnam J, Seiwerth S, Fritchie K, Patel RM, Rubin BP, Billings SD
• Diagnoses of hospitalized patients with skin abnormalities prompting biopsy by consulting dermatologists: A 3-year review from a tertiary care center.
  Journal of cutaneous pathology 2019 Ellis A, Billings SD, Khanna U, Warren CB, Piliang M, Vij A, Ko JS, Bergfeld WF, Fernandez AP
• Differences in exposure to toxic and/or carcinogenic volatile organic compounds between Black and White cigarette smokers.
  Journal of exposure science & environmental epidemiology 2019 St Helen G, Benowitz NL, Ko J, Jacob P, Gregorich SE, Pérez-Stable EJ, Murphy SE, Hecht SS, Hatsukami DK, Donny EC
• CRTC1-TRIM11 fusion defined melanocytic tumors: A series of four cases.
  Journal of cutaneous pathology 2019 Ko JS, Wang L, Billings SD, Pissaloux D, Tirode F, Berry R, De La Fouchardiere A
• Prognostic Significance of "Nonsolid" Microscopic Metastasis in Merkel Cell Carcinoma Sentinel Lymph Nodes.
  The American journal of surgical pathology 2019 Erstine EM, Tetzlaff MT, Jia X, Aung PP, Prieto VG, Funchain P, Gastman BR, Billings SD, Ko JS
• ALPK1 hotspot mutation as a driver of human spiradenoma and spiradenocarcinoma.
  Nature communications 2019 Rashid M, van der Horst M, Mentzel T, Butera F, Ferreira I, Pance A, Rütten A, Luzar B, Marusic Z, de Saint Aubain N, Ko JS, Billings SD, Chen S, Abi Daoud M, Hewinson J, Louzada S, Harms PW, …
• Decreased T-Cell Programmed Death Receptor-1 Expression in Pregnancy-Associated Melanoma.
  The American Journal of dermatopathology 2019 Ko JS, Gastman BR, Conic R, Tellez Diaz Trujillo A, Diaz-Montero CM, Billings SD, Tarhini A, Funchain P, Atanaskova Mesinkovska N
• Correlation of melanoma gene expression score with clinical outcomes on a series of melanocytic lesions.
  Human pathology 2018 Ko JS, Clarke LE, Minca EC, Brown K, Flake DD, Billings SD
• Histopathologic correlation of high-risk MelaFindTM lesions: a 3-year experience from a high-risk pigmented lesion clinic.
  International journal of dermatology 2018 Shrivastava V, Bailin P, Elliott J, Bacnik E, Gastman B, Bergfeld W, Billings SD, Piliang M, Fernandez A, Kovalyshyn I, Ko JS
• Superficial Solitary Fibrous Tumor: A Series of 26 Cases.
  The American journal of surgical pathology 2018 Feasel P, Al-Ibraheemi A, Fritchie K, Zreik RT, Wang WL, Demicco E, Saeb-Lima M, Goldblum JR, Rubin BP, McKenney JK, Ko JS, Billings SD
• Efficacy of Triaging Direct Immunofluorescence in Intraepidermal Bullous Dermatoses.
  The American Journal of dermatopathology 2018 Tjarks BJ, Billings SD, Ko JS
• Myxofibrosarcoma of unusual sites.
  Journal of cutaneous pathology 2017 Tjarks BJ, Ko JS, Billings SD
• Direct immunofluorescence testing in vasculitis-A single institution experience with Henoch-Schönlein purpura.
  Journal of cutaneous pathology 2017 Feasel P, Billings SD, Bergfeld WF, Piliang MP, Fernandez AP, Ko JS
• Broadening the Anatomic Landscape of Sclerosing Perineurioma: A Series of 5 Cases in Nonacral Sites.
  The American Journal of dermatopathology 2017 Erstine EM, Ko JS, Rubin BP, McKenney JK, Goldblum JR, Billings SD
• Spindle Cell Lipomas in Women: A Report of 53 Cases.
  The American journal of surgical pathology 2017 Ko JS, Daniels B, Emanuel PO, Elson P, Khachaturov V, McKenney JK, Goldblum JR, Billings SD
• Tuberculosis contact investigation in an intermediate burden setting: implications from a large tuberculosis contact cohort in Taiwan.
  The European respiratory journal 2017 Lee MR, Ho CM, Lee CH, Lee MC, Chang LY, Yu KL, Ko JC, Wang JY, Wang JT, Lee LN
• Living on the Edge: Diagnosing Sarcomatoid Melanoma Using Histopathologic Cues at the Edge of a Dedifferentiated Tumor: A Report of 2 Cases and Review of the Literature.
  The American Journal of dermatopathology 2017 Erstine EM, Tetzlaff MT, Ko JS, Prieto VG, Cheah AL, Billings SD
• Merkel cell carcinoma with fingolimod treatment for multiple sclerosis: A case report.
  Multiple sclerosis and related disorders 2017 Mahajan KR, Ko JS, Tetzlaff MT, Hudgens CW, Billings SD, Cohen JA
• Diagnostic Distinction of Malignant Melanoma and Benign Nevi by a Gene Expression Signature and Correlation to Clinical Outcomes.
  Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 2017 Ko JS, Matharoo-Ball B, Billings SD, Thomson BJ, Tang JY, Sarin KY, Cai E, Kim J, Rock C, Kimbrell HZ, Flake DD, Warf MB, Nelson J, Davis T, Miller C, Rushton K, Hartman AR, Wenstrup RJ, Clarke LE
• Radiation-associated angiosarcoma in the setting of breast cancer mimicking radiation dermatitis: A diagnostic pitfall.
  Journal of cutaneous pathology 2017 Daniels BH, Ko JS, Rowe JJ, Downs-Kelly E, Billings SD
• Significance of epidermal mitoses in challenging melanocytic proliferations.
  Journal of cutaneous pathology 2016 Minca EC, Billings SD, Elson P, Tetzlaff MT, Andea AA, Ko JS
• Pagetoid Spitz nevi: clinicopathologic characterization of a series of 12 cases.
  Journal of cutaneous pathology 2016 Fernandez AP, Billings SD, Bergfeld WF, Ko JS, Piliang MP
• Cutaneous manifestations in inflammatory bowel disease: a single institutional study of non-neoplastic biopsies over 13 years.
  Journal of cutaneous pathology 2016 Ko JS, Uberti G, Napekoski K, Patil DT, Billings SD
• Comparison between melanoma gene expression score and fluorescence in situ hybridization for the classification of melanocytic lesions.
  Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 2016 Minca EC, Al-Rohil RN, Wang M, Harms PW, Ko JS, Collie AM, Kovalyshyn I, Prieto VG, Tetzlaff MT, Billings SD, Andea AA
• Density, Distribution, and Composition of Immune Infiltrates Correlate with Survival in Merkel Cell Carcinoma.
  Clinical cancer research : an official journal of the American Association for Cancer Research 2016 Feldmeyer L, Hudgens CW, Ray-Lyons G, Nagarajan P, Aung PP, Curry JL, Torres-Cabala CA, Mino B, Rodriguez-Canales J, Reuben A, Chen PL, Ko JS, Billings SD, Bassett RL, Wistuba II, Cooper ZA, Prieto VG…
• Histological pattern of Merkel cell carcinoma sentinel lymph node metastasis improves stratification of Stage III patients.
  Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 2015 Ko JS, Prieto VG, Elson PJ, Vilain RE, Pulitzer MP, Scolyer RA, Reynolds JP, Piliang MP, Ernstoff MS, Gastman BR, Billings SD
• A novel IL-17 signaling pathway controlling keratinocyte proliferation and tumorigenesis via the TRAF4-ERK5 axis.
  The Journal of experimental medicine 2015 Wu L, Chen X, Zhao J, Martin B, Zepp JA, Ko JS, Gu C, Cai G, Ouyang W, Sen G, Stark GR, Su B, Vines CM, Tournier C, Hamilton TA, Vidimos A, Gastman B, Liu C, Li X
• Diagnostically Challenging Epithelioid Vascular Tumors.
  Surgical pathology clinics 2015 Ko JS, Billings SD
• Safety of interventional bronchoscopy through complication review at a cancer center.
  The clinical respiratory journal 2014 Hsu LH, Liu CC, Ko JS, Chen CC, Feng AC
• Fully automated dual-color dual-hapten silver in situ hybridization staining for MYC amplification: a diagnostic tool for discriminating secondary angiosarcoma.
  Journal of cutaneous pathology 2014 Ko JS, Billings SD, Lanigan CP, Buehler D, Fernandez AP, Tubbs RR
• Morphologic mimickers of Cryptococcus occurring within inflammatory infiltrates in the setting of neutrophilic dermatitis: a series of three cases highlighting clinical dilemmas associated with a novel histopathologic pitfall.
  Journal of cutaneous pathology 2013 Ko JS, Fernandez AP, Anderson KA, Burdick LM, Billings SD, Procop GW, McMahon JT, Bergfeld WF, Piliang MP
• Sunitinib mediates reversal of myeloid-derived suppressor cell accumulation in renal cell carcinoma patients.
  Clinical cancer research : an official journal of the American Association for Cancer Research 2009 Ko JS, Zea AH, Rini BI, Ireland JL, Elson P, Cohen P, Golshayan A, Rayman PA, Wood L, Garcia J, Dreicer R, Bukowski R, Finke JH