Dr. Sellheyer 2016-10-13T02:49:59+00:00

     Dr. Klaus Sellheyer

Klaus Sellheyer, M.D. is board-certified in dermatology, anatomic pathology, and dermatopathology in the United States. He was born in Germany, where he obtained his medical degree from the Georg-August-University and completed a residency in dermatology. He also conducted extensive research in eye disease and electron microscopy and a research fellowship in immunohistochemistry and cell culture at German universities.

After immigrating to the United States in 1998, Dr. Sellheyer completed additional residency training in anatomic pathology at the Albert Einstein College of Medicine and in dermatology at the Cleveland Clinic Foundation. In addition, he undertook fellowship training in dermatopathology at New York University Medical Center and at the University of Chicago Hospitals. Dr. Sellheyer also trained for three years in Molecular Dermatology at Baylor College of Medicine.

With his extensive training, Dr. Sellheyer has held many academic posts and professorships at medical schools across the country. He has authored more than 75 papers relating to diseases of the skin, and published in peer-reviewed journals and books.

Dr. Sellheyer joined Florida Dermatology and Skin Cancer Centers on June 1, 2016, and enjoys working with patients. In his spare time, he likes to bike, travel, and listen to classical music.

04/04/66 – 06/09/78  High School and College in Bochum, Germany

10/01/78 – 04/19/85  Study of medicine including internship at the Universities of Bochum, Cologne and Göttingen, Germany

04/30/85  License to practice medicine in Germany

05/10/85  M.D. degree awarded at the University of Göttingen

 Post-Graduate Training:

06/01/85 – 05/30/87  Postdoctoral fellowship in electron microscopy, Department of Ophthalmology, University of Bonn, FRG

06/01/87 – 05/30/88  Residency training in ophthalmology, Department of Ophthalmology, University of Bonn, FRG

06/01/88 – 06/30/89  Research fellowship in immunohistochemistry and cell culture, Department of Pathology, Free University of Berlin, FRG

07/01/89 – 12/31/89 Residency training in Dermatology, Department of Dermatology, Klinikum Elberfeld, Wuppertal, Medical School University of Düsseldorf, FRG

07/01/90 – 04/30/91 Continued Residency training in Dermatology, Department of Dermatology, Klinikum Elberfeld, Wuppertal, Medical School University of Düsseldorf, FRG

05/01/94 – 06/30/95  Continued Residency training in Dermatology, Department of Dermatology, Klinikum Elberfeld, Wuppertal, Medical School University of Düsseldorf, FRG

 01/01/90 – 06/30/90  Fellowship in Dermatopathology, Division of Dermatopathology, Department of Dermatology, New York University Medical Center

05/01/91 – 04/30/94  Research fellowship in molecular dermatology, Department of Cell Biology, Baylor College of Medicine, Houston, Texas

07/01/96 – 06/30/97  Internship in general pediatrics at Children’s Hospital of Michigan, Wayne State University, Detroit, Michigan

11/09/98 – 06/30/01 Residency in anatomic pathology at the Department of Pathology, Albert Einstein College of Medicine, Bronx, New York

 07/01/01 – 06/30/02  Fellowship in dermatopathology at the Section of Dermatology, The University of Chicago Hospitals, Chicago, Illinois

 07/01/04 – 06/30/07 Residency in dermatology at the Department of Dermatology, Cleveland Clinic Foundation, Cleveland, Ohio

10/12/2007 Dermatology, American Board of Dermatology
11/08/2002 Dermatopathology, American Board of Pathology
09/21/2001 Anatomic Pathology, American Board of Pathology
10/11/2001 Pathology, European Board of Pathology
08/31/1995 Dermatology, Ärztekammer Nordrhein Germany

LICENSES:

09/05/2000 Indiana 01052941A
05/22/2002 Florida ME85014
08/08/2008 Georgia 061517
06/06/2011 Arizona 44893
08/03/2011 California C 54810
01/21/2014 Tennessee 50841
06/18/2015 Michigan 4301068006
02/22/2016 North Carolina 2009-00315

2015-2016 Dermatologist and Dermatopathologist, Skin Cancer and Cosmetic Dermatology Treatment Center, Chattanooga, TN

2014-2015 Dermatologist and Dermatopathologist, Southside Dermatology, Jacksonville, FL

2008-2014 Dermatologist and Dermatopathologist, Nelson Dermatopathology Associates, Atlanta, GA

1978   First Prize in the German “Youth Research Competition”. Endocrinology of reproduction in pond snails

1980  First Prize in the “Philips European Competition for Young Researchers and Inventors”. Continued study on the endocrinology of reproduction in pond snails

Since 2010  International Society of Dermatopathology
Since 2008 Atlanta Dermatological Association
Since 2004 American Academy of Dermatology
Since 2003 American Society for Dermatopathology
2004-2007 Cleveland Dermatological Society

Clinical Professor of Dermatology
Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH
03/10/2011 – present

Adjunct Staff Member
Cleveland Clinic Foundation, Department of Dermatology, Cleveland, OH
01/01/2009 – present

Associate Professor of Dermatology and Pathology
University of Alabama at Birmingham, Department of Dermatology, Birmingham, AL
10/01/2007 – 10/31/2008

Clinical Associate
Cleveland Clinic Foundation, Division of Anatomic Pathology (Dermatopathology)
07/01/2003 – 06/30/2004

Assistant Professor of Pathology
Thomas Jefferson University, Department of Pathology, Cell Biology, and Anatomy, Philadelphia, PA
07/01/2002 – 06/30/2003

Curriculum/Course Development
Introduction to dermatopathology, University of Alabama at Birmingham Medical School (20 hours)

Trainees and Mentees
Colleen Embi, MD, 2003 – 2004, Cleveland Clinic private practice in dermatopathology

Lin Lin, MD, 2004 – 2005, Cleveland Clinic private practice in dermatopathology

Melissa Piliang, MD, 2005 – 2006, Cleveland Clinic Associate Staff in Dermatology, Cleveland Clinic

Rajiv Patel, MD, 2006 – 2007, Cleveland Clinic Associate Professor of Dermatology, University of Michigan, Ann Arbor

Dara Wakefield, MD, 2007 – 2008, University of Alabama at Birmingham Pathology Resident, University of Florida, Gainesville

Ibrahim Khalifeh, MD, 2008, University of Alabama at Birmingham Assistant Professor of Pathology, American University, Beirut, Lebanon

Teaching Material Produced
Core Curriculum in Dermatopathology, Medical School, University of Alabama at Birmingham, 01/01/2008

Teaching Administration
Fellowship Program Director, Dermatopathology, University of Alabama at Birmingham (2—10/31/2008)

Teaching Activities
2002-2004 Bimonthly dermatopathology teaching sessions on unknown cases, Department of Pathology, Thomas Jefferson University, Philadelphia, PA

2003-2007 Bimonthly dermatopathology teaching sessions on unknown cases, Section of Dermatopathology, Cleveland Clinic Foundation, Cleveland, OH

2003 & 2004, 2005 & 2006 Board preparation course in dermatopathology for dermatology residents in dermatopathology, Section of Dermatopathology, Cleveland Clinic Foundation, Cleveland, OH

2007-2008 Weekly dermatopathology teaching sessions on unknown cases, Department of Dermatology, University of Alabama at Birmingham

Since 2009 (biannually) Board preparation course in dermatopathology (whole day)
for dermatology residents, Department of Dermatology, Cleveland Clinic Foundation, Cleveland, OH

Reviewer

Journal of the American Academy of Dermatology
Experimental Dermatology
Pigment Cell Research
Journal of Cutaneous Pathology
American Journal of Dermatopathology
Archives of Dermatology
PLoS Medicine

Study Sections/Grant Review Committees

Skin Diseases Research Center, University of Alabama at Birmingham
Dates of Service: 01/01/2008 – 10/31/2008

1.  European Club for Ophthalmic Fine Structure, Fourteenth Annual Meeting Oxford, England, 13/14th September 1986: Ultrastructure of the tunica vasculosa lentis posterior in the human embryo

2. International Seminar on Electron Microscopy Bonn, Germany, 10/11th January 1987: Ultrastructure of the tunica vasculosa lentis posterior in the human embryo

3. European Club for Ophthalmic Fine Structure, Fifteenth Annual Meeting Paris, France, 14/15th September 1987: Human scleral embryogenesis

4. European Club for Ophthalmic Fine Structure, Fifteenth Annual Meeting Paris, France, 14/15th September 1987: Fine structure of the developing human conjunctival epithelium

5. Seminar of the Rhenish Society for the Natural Sciences Bonn, Germany, 4th November 1987: Eye development during early gestation

6. Symposium of the Berlin Ophthalmological Society Berlin, Germany, 5/6th December 1987: Morphological observations on the prenatal development of the human eye

7. Symposium of the German Ophthalmological Society Berlin, Germany, 18th to 21st September 1988: Light and electron microscopical studies on the development of the human ciliary body

8. Symposium of the Rhenish-Westphalian Society for Dermatology Wuppertal, Germany, 27th to 29th October 1989: The developing human conjunctiva as a model for the embryogenesis of mucosal tissue

9. Symposium of the Wuppertal Society for Dermatology Wuppertal, Germany, 6th February 1991: Eosinophilic pustulosis Ofuji

10. Meeting of the Society for Investigative Dermatology Washington, D.C., USA, 10th to 12th September 1993: Inhibition of skin development by overexpression of transforming growth factor β1 in the epidermis of transgenic mice

11. Meeting of the United States and Canadian Academy of Pathology New Orleans, LA, USA, 25th to 31st March 2000: Expression and distribution of bcl-2 and and bax during the development of the  human skin (platform)

12. 31st Annual Dermatopathology Self-Assessment Workshop The Cleveland Clinic Foundation, Cleveland, OH, USA, 4th October 2003 On Faculty – Case Presentation (cases 1 – 4)

13. 17th Annual Clinic Seminars Dermatology The Cleveland Clinic Foundation, Cleveland, OH, USA, 14th November 2003 On Faculty – What’s New in Dermatopathology? DNA microarrays: From structural genomics to functional genomics.

14. 32nd Annual Dermatopathology Self-Assessment Workshop The Cleveland Clinic Foundation, Cleveland, OH, USA, 9th October 2004 On Faculty – Case Presentation (cases 9 – 13)

15. 41st Annual Meeting of the American Society of Dermatopathology Boston, MA, USA, 14-17th October 2004 Is it appropriate for nondermatologists to perform skin biopsies?

16. 63rd Annual Meeting of the American Academy of Dermatology New Orleans, LA, USA, 18th – 22nd February 2005 Secondary syphilis presenting as cutaneous T cell lymphoma in an HIV-1 positive patient

17. 63rd Annual Meeting of the American Academy of Dermatology New Orleans, LA, USA, 18th – 22nd February 2005 Is it appropriate for nondermatologists to perform skin biopsies?

18. 63rd Annual Meeting of the American Academy of Dermatology New Orleans, LA, USA, 18th – 22nd February 2005 Evaluation of margins in melanocytic lesions – a survey of 152 dermatopathologists.

19. 63rd Annual Meeting of the American Academy of Dermatology San Francisco, CA, USA, 18th – 22nd February 2005 Targetoid lesions in biopsy-proven bullous pemphigoid.

20. 44th Annual Meeting of the American Society of Dermatopathology Baltimore, MD, USA, 14-17th October 2007 Dirofilaria repens presenting as a subcutaneous nodule.

21. 45th Annual Meeting of the American Society of Dermatopathology San Francisco, CA, USA, 16-19th October 2008 p16 Expression differentiates between desmoplastic melanoma and desmoplastic Spitz nevus.

22. 45th Annual Meeting of the American Society of Dermatopathology San Francisco, CA, USA, 16-19th October 2008 p16 Expression in trichilemmomas.

23. 45th Annual Meeting of the American Society of Dermatopathology San Francisco, CA, USA, 16-19th October 2008 Primary cutaneous carcinosarcoma mistaken for basal cell carcinoma.

24. 67rd Annual Meeting of the American Academy of Dermatology San Francisco, CA, USA, 6th –10th March 2009 Disseminated Fusarium in a neutropenic patient originating from toenail paronychia

25. 46th Annual Meeting of the American Society of Dermatopathology Chicago, IL, USA, 1-4th October 2009 Dermatofibrosarcoma protuberans: a tumor of nestin-positive cutaneous mesenchymal stem cells?

1. Whitehead, D. L., Sellheyer, K. (1982). The identification of ecdysterone  (20-hydroxyecdysterone) in 3 species of molluscs (Gastropoda: Pulmonata). Experientia 38:1249-1251

2. Sellheyer, K., Spitznas, M. (1987) Ultrastructure of the human posterior tunica vasculosa lentis during early gestation. Graefe’s Arch. Clin. Exp. Ophthalmol. 226:377-383

3. Sellheyer, K., Spitznas, M. (1988) The fine structure of the developing human choriocapillaris during the first trimester. Graefe’s Arch. Clin. Exp. Ophthalmol. 226:65-74

4. Sellheyer, K., Spitznas, M. (1988) Surface morphology of the human ciliary body during prenatal development. Graefe’s Arch. Clin. Exp. Ophthalmol. 226:78-83

5. Sellheyer, K., Spitznas, M. (1988) Development of the human sclera. Graefe’s Arch. Clin. Exp. Ophthalmol. 226:89-100

6. Sellheyer, K., Spitznas, M. (1988) Differentiation of the human ciliary muscle in the embryo and fetus. Graefe’s Arch. Clin. Exp. Ophthalmol. 226:281-287

7. Sellheyer, K., Spitznas, M. (1988) Morphology of the developing choroidal vasculature in the human fetus. Graefe’s Arch. Clin. Exp. Ophthalmol. 226:461-467

8. Sellheyer, K., Spitznas, M. (1988) Surface differentiation of the human corneal epithelium during prenatal development.  Graefe’s Arch. Clin. Exp. Ophthalmol. 226:482-488

9. Sellheyer, K., Spitznas, M. (1988) Ultrastructural observations on the development of the human conjunctival epithelium. Graefe’s Arch. Clin. Exp. Ophthalmol. 226:489-499

10. Sellheyer, K. (1988) Pränatalentwicklung des menschlichen Auges. Teil 1. Ztschr. Prakt. Augenheilkde 9:191-197

11. Sellheyer, K. (1988) Pränatalentwicklung des menschlichen Auges. Teil 2. Ztschr. Prakt. Augenheilkde 9:307-310

12. Sellheyer, K., Spitznas, M. (1989) Licht- und elektronenmikroskopische Untersuchungen zur Entwicklung des menschlichen Ziliarkörpers. Fortschr. Ophthalmol. 86: 392-398

13. Sellheyer, K., Schwarting, R., Stein, H. (1989) Isolation and antigenic profile of follicular dendritic cells. Clin. Exp. Immunol. 78:431-436

14. Sellheyer, K. (1990) Morphology of the choroid and related structures during prenatal development. Eye 4:255-261

15. Sellheyer, K., Bickenbach, J.R., Rothnagel, J.A., Bundman, D., Longley, M.A., Krieg, T., Roche, N.S., Roberts, A.B., Roop, D.R. (1993) Inhibition of skin development by overexpression of transforming growth factor β 1 in the epidermis of transgenic mice. Proc. Natl. Acad. Sci. USA 90:5237-5241

16. Dominey, A.M., Wang, X.J., Gagne, T.A., Sellheyer, K., Bundman, D.S., Longley, M.A., Rothnagel, J.A., Greenhalgh, D.A., Roop, D.R. (1993)   Targeted overexpression of transforming growth factor α in the epidermis of transgenic mice elicits hyperplasia, hyperkeratosis, and spontaneous, squamous papillomas. Cell Growth Differentiation 4:1071-1082

17. Rothnagel, J.A., Greenhalgh, D.A., Wang, X.-J., Sellheyer, K., Bickenbach, J.R., Dominey, A.M., Roop, D.R. (1993) Transgenic models of skin diseases. Arch. Dermatol. 129:1430-1436

18. Sellheyer, K. (1995) Transgenic mice as models for skin diseases. Hautarzt 46:755-761

19. Matzuk, M.M., Lu, N., Vogel, H., Sellheyer, K., Roop, D.R., Bradley, A. (1995) Multiple defects and perinatal death in mice deficient in follistatin.Nature 374:360-363

20. Sellheyer, K., Krahl, D., Ratech, H. (2001) Distribution of bcl-2 and bax in embryonic and fetal human skin: antiapoptotic and proapoptotic proteins are differentially expressed in developing skin. Am. J. Dermatopathol. 23:1-7

21. Sellheyer, K. (2003) Pathogenesis of solar elastosis: synthesis or degradation? J. Cutan. Pathol. 30:123-127

22. Sellheyer, K., Smoller, B.R. (2003) Dermatofibroma: upregulation of syndecan-1 expression in mesenchymal tissue. Am. J. Dermatopathol. 25:392-398

23. Sellheyer K, Soltani K, Shea CR. (2003) Pathologic quiz case: an enlarging, firm nodule on the abdominal skin in an otherwise healthy 73-year-old woman. Arch Pathol Lab Med. 127:E109-10

24. Sellheyer, K., Stein, S., Medenica, M. (2004) Vesicular eruption on the trunk and in intertriginous folds–quiz case. Arch Dermatol. 140: 231-236

25. Sellheyer, K., Belbin TJ (2004) DNA microarrays: From structural genomics to functional genomics – The applications of gene chips in dermatology and dermatopathology. J. Am. Acad. Dermatol. 51: 681-692

26. K. Chung, B.J., Embi, C.S., Sellheyer, K., Krakovitz P.R. (2005) Nasal juvenile xanthogranuloma. Arch. Otolaryngol. Head Neck Surg. 131: 81-82

27. Sellheyer, K., Bergfeld, W.F., E. Stewart, G. Roberson, J. Hammel (2005) Evaluation of surgical margins in melanocytic lesions: a survey among 152 dermatopathologists. J. Cutan. Pathol. 32:293-299

28. Sellheyer, K., Bergfeld, W.F. (2005) A retrospective biopsy study of the clinical diagnostic accuracy of common skin diseases by different specialties compared with dermatology. J. Am. Acad. Dermatol. 52:823-830

29. Sellheyer, K., Bergfeld, W.F. (2005) “Lesion,” “rule out…,” and other vagaries of filling out pathology requisition forms. J. Am. Acad. Dermatol. 52:914-915

30. Sellheyer, K., Bergfeld, W.F. (2005) When to ask your dermatopathologist to evaluate for surgical margins and when not: a matter of confusion for dermatologists and dermatopathologists alike. J. Am. Acad. Dermatol. 52:1095-1097

31. Sellheyer, K., Krahl, D. (2005) “Hidradenitis suppurativa” is Acne inversa! An appeal to (finally) abandon a misnomer. Int. J. Dermatol. 44:535-540

32. Sellheyer, K.Bergfeld, W.F. (2005) Differences in biopsy techniques of actinic keratoses by plastic surgeons and dermatologists: A histologically controlled pilot study. Arch Dermatol. 142:455-459

33. Sellheyer, K., Bergfeld, W.F. (2006) Histopathological evaluation of alopecias. Am. J. Dermatopathol. 28:236-259

34. Sellheyer, K.Krahl D. (2007) Response to letter to the editor regarding Hidradenitis suppurativa is acne inversa. Int J Dermatol. 46:330-332

35. Sellheyer, K.(2007) Mechanisms of laser hair removal: could persistent photoepilation induce vitiligo or defects in wound repair? Derm. Surg. 33:1055-1065

36. Krahl, D., Sellheyer, K. (2007) Monoclonal antibody Ber-EP4 reliably discriminates between microcystic adnexal carcinoma and basal cell carcinoma. J. Cutan. Pathol. 34:782-787

37. Sellheyer, K. Krahl, D., (2008) Basal cell (trichoblastic) carcinoma. Common expression pattern for epithelial cell adhesion molecule (Ep-CAM) links basal cell carcinoma to early follicular embryogenesis, secondary hair germ and outer root sheath of the vellus hair follicle: a clue to the adnexal nature of basal cell carcinoma? J. Am. Acad. Dermatol. 58:158-167

38. Sellheyer, K. Krahl, D., (2008) Ber-EP4 enhances the differential diagnostic accuracy of cytokeratin 7 in pagetoid cutaneous neoplasms. J. Cutan. Pathol. 35:366-372

39. Sellheyer, K. Krahl, D., (2008) What causes acne inversa (or hidradenitis suppurativa)? The debate continues. J. Cutan. Pathol. 35:701-703

40. Krahl, D., Sellheyer, K. (2009) A scanning microscopic clue to the diagnosis of arthropod assault reactions: alteration of interstitial tissue is more common than a wedge-shaped inflammatory infiltrate. J. Cutan. Pathol. 36:308-313

41. Hilliard, N.J., Wakefield, D.N., Krahl, D., Sellheyer, K. (2009) p16 Expression in conventional and desmoplastic trichilemmomas. Am. J. Dermatopathol. 31:342-349

42. Kwon EJ, Kristjansson AK, Meyerson HJ, Fedele GM, Tung RC, Sellheyer K, Tuthill RJ, Honda KS, Gilliam AC, McNiff JM. (2009) A case report of recurrent pseudolymphomatous folliculits – A mimic of cutaneous lymphoma. J. Am. Acad. Dermatol. 60:994-1000

43. Hilliard, N.J., Krahl, D., Sellheyer, K. (2009) p16 Expression differentiates between desmoplastic Spitz nevus and desmoplastic melanoma. J. Cutan. Pathol. 36:753-759

44. Khalifeh, I., Hughey, L.C., Huang, C.C., Reddy, V.V.B., Sellheyer, K. (2009) Solitary plaque on the scalp as a primary manifestation of Hodgkin lymphoma: a case report and review of the literature. J. Cutan. Pathol. 36 Suppl 1:80-85

45. Wakefield D.N., Krahl, D., Wainer B., Sellheyer, K. (2009) Cytologic atypia does not equal malignancy. A comparative analysis of melanocytic and neural lesions. J. Cutan. Pathol. 36:1014-1021

46. Krahl, D., Sellheyer, K. (2009) The neuroepithelial stem cell protein nestin is a marker of the companion cell layer of the adult and developing human hair follicle. Br. J. Dermatol. 161:678-682

47. Sellheyer, K., Nelson, P., Krahl, D., (2009) Dermatofibrosarcoma protuberans: a tumor of nestin-positive cutaneous mesenchymal stem cells? Br. J. Dermatol. 161:1317-1322

48. Krahl, D., Sellheyer, K., (2010) Sox9: more than a marker of the outer root sheath. Spatiotemporal expression pattern during human cutaneous embryogenesis. J. Cutan. Pathol. 37:350-356

49. Sellheyer, K., Krahl, D., (2010) Expression pattern of GATA-3 in embryonic and fetal human skin suggests a role in epidermal and follicular morphogenesis. J Cutan Pathol. 37:357-361

50. Sellheyer, K., Krahl, D., (2010) Blimp-1: a marker of terminal differentiation but not of sebocytic progenitor cells.  A comparative analysis of embryonic and adult human skin with sebaceous neoplasms. J Cutan Pathol. 37:362-370

51. Sellheyer, K., Krahl, D., (2010) Mesenchymale Stammzellen der Haut. Gegenwärtiger Stand der Forschung, potenzielle klinische Anwendungen. Hautarzt 61:429-434

52. Bourgeois, G.P., Cafardi, J.A., Sellheyer, K., Andea A.A. (2010) Disseminated Fusarium in a neutropenic patient originating from toenail paronychia. Cutis 85:191-194

53. Sellheyer, K., Krahl, D., (2010) Cutaneous mesenchymal stem cells: Status of current knowledge, implications for dermatopathology. J. Cutan Pathol. 37:624-634

54. Sellheyer, K., Krahl, D., (2010) Spatiotemporal expression pattern of neuroepithelial stem cell marker nestin suggests a role in dermal homeostasis, neovasculogenesis and tumor stroma development. A study on embryonic and adult human skin. J. Am. Acad. Dermatol. 63:93-113

55. Krahl, D., Sellheyer, K., (2010) p75 Neurotrophin receptor differentiates between morphoeic basal cell carcinoma and desmoplastic trichoepithelioma: Insights into the histogenesis of adnexal tumours based on embryology and hair follicle biology. Br. J. Dermatol. 163:138-145

56. Sellheyer, K. (2010) Focusing on leaves while ignoring the forest: Reflections on the lack of hypothesis-driven research in dermatopathology and what is to be done J. Cutan Pathol. 37:328-321

57. Sellheyer, K., Krahl, D., (2010) Skin mesenchymal stem cells: prospects for clinical dermatology. J. Am. Acad. Dermatol. 63:859-865

58. Krahl, D., Sellheyer, K., (2010) Basal cell carcinoma and pilomatrixoma mirror human follicular embryogenesis as reflected by their differential expression patterns of SOX9 and beta-catenin. Br. J. Dermatol. 162: 1294-1301

59. Sellheyer, K., Nelson, P., Bergfeld, W.F. (2010) Inadequate biopsy technique and specimen size: an alarming trend that compromises patient care and an appeal to our clinical colleagues. Arch. Dermatol. 146:1180-1181

60. Sellheyer, K., (2011) Basal cell carcinoma and stem cell markers: contribution to possible histogenesis? Hautarzt 62:119-127

61. Sellheyer, K., Krahl, D. (2011) PHLDA1 (TDAG51) is a follicular stem cell marker and differentiates between morphoeic basal cell carcinoma and desmoplastic trichoepithelioma. Br. J. Dermatol. 164:141-147

62. Sellheyer, K., (2011) Basal cell carcinoma: cell of origin, cancer stem cell hypothesis, and stem cell markers. Br. J. Dermatol. 164:696-711

63. Sellheyer, K., Nelson, P., Patel, R.M. (2011) Expression of embryonic stem cell markers SOX2 and nestin in dermatofibrosarcoma protuberans and dermatofibroma. J. Cutan. Pathol. 38:415-419

64. Sellheyer, K., (2011) Stem cell markers can help identify adnexal tumor differentiation when evaluated in the context of morphology: methodology matters. J. Cutan. Pathol. 38:460-474

65. Sellheyer, K., Nelson, P. (2010) Follicular stem cell marker PHLDA1 (TDAG51) is superior to cytokeratin 20 in differentiating between trichoepithelioma and basal cell carcinoma in small biopsy specimens. J. Cutan. Pathol. 38:542-550

66. Sellheyer, K., Krahl, D. (2011) Does the peritumoral stroma of basal cell carcinoma recapitulate the follicular connective tissue sheath? A comparative analysis of nestin expression in basal cell carcinoma, trichoepithelioma, trichoblastoma, and the hair follicle. J. Cutan. Pathol. 38:551-559

67. Sellheyer, K., Atanaskova-Mesinkovska, N.,  Nelson, P.,  Bergfeld, W.F. (2011) Differential expression of stem cell markers in lichen planopilaris and alopecia areata. Br. J. Dermatol. 165:1149-1151

68. Sellheyer, K., Nelson, P. , Kutzner, H. (2012) Fibroepithelioma of Pinkus is a true basal cell carcinoma developing in association with a newly identified tumour-specific type of epidermal hyperplasia. Br. J. Dermatol. 166:88-97

69. Sellheyer, K. (2012) Reply: Methodology matters as does knowledge of underlying basic science…. J. Cutan. Pathol. 39:83-87

70. Sellheyer, K., Nelson, P. (2012) The ventral proximal nail fold: stem cell niche of the nail and equivalent to the follicular bulge. A study on developing human skin. J. Cutan. Pathol. 39:835-843

71. Sellheyer, K. (2013) Nail stem cells. J. Dtsch. Dermatol. Ges. 11:235-239

72. Sellheyer, K., Nelson P., Kutzner H., Patel R.M. (2013) The immunohistochemical differential diagnosis of microcystic adnexal carcinoma, desmoplastic trichoepithelioma and morpheaform basal cell carcinoma using BerEP4 and stem cell markers. J. Cutan. Pathol. 40:363-370

73. Sellheyer, K., Cribier, B., Nelson, P., Kutzner, H., Rütten, A (2013) Basaloid tumors in nevus sebaceus revisited: the follicular stem cell marker PHLDA1 (TDAG51) indicates that most are basal cell carcinomas and not trichoblastomas. J. Cutan Pathol. 40:455-462

74. Sellheyer, K., Nelson P. (2013) The concept of the onychodermis (specialized nail mesenchyme): an embryological assessment and a comparative analysis with the hair follicle. J. Cutan Pathol. 40:463-471

75. Sellheyer, K., Nelson, P. (2013) CD133, a stem cell marker in mice: results in animal models cannot always be applied to human skin. J. Cutan. Pathol. 40:690-692

76. Buster K.J., Burford H.N., Stewart F.A., Sellheyer K., Hughey L.C. (2013) Sclerema neonatorum treated with intravenous immunoglobulin: a case report and review of treatments. Cutis 92:83-87

77. Sellheyer, K., Nelson, P., Bergfeld, W.F. (2014) Nonspecific histopathological diagnoses: the impact of partial biopsy and the need for a consensus guideline. JAMA Dermatol. 150:11-12

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