Chondroid syringoma

Cytokeratin 20 immunolocalization of merkel cells and reappraisal of apocrine folliculo-sebaceous differentiation

Mohamed E. Salama, Muhammad Azam, Chan K. Ma, Adrian Ormsby, Richard J. Zarbo, Mahul Amin, Min W. Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Context.-Chondroid syringoma (CS) is a benign cutaneous adnexal tumor with epithelial and stromal components. Epithelial components derived from folliculo-sebaceous-apocrine germ are evident in apocrine but not in eccrine CS. Objectives.-To further characterize pilosebaceous differentiation and to identify the presence of Merkel cells in the areas of follicular differentiation. Design.-Histologic type, folliculo-sebaceous differentiation, character of stroma, and presence or absence of Merkel cells by cytokeratin (CK) 20 immunoreactivity were evaluated in 25 CSs (22 apocrine and 3 eccrine) from the surgical pathology files of Henry Ford Hospital (Detroit, Mich). Results.-Most CSs occurred in the head and neck region of patients aged 40 years or older. We found no significant difference in sex, age, or location between apocrine and eccrine types. The stroma varied from myxoid (100%) to chondroid (59%), with various amounts of fat (59%) and ossification identified in 2 cases (9%) of apocrine type, but was homogeneously myxoid in the eccrine type. Follicular and sebaceous differentiation was found in 64% and 32% of apocrine CSs, respectively. Only 2 (14%) apocrine CSs with follicular differentiation were positive for CK20 (a few scattered cells in one case and numerous grouped cells in the other in association with follicular epithelium). No correlation was found between type of stroma and the presence of Merkel cells. Scattered Merkel cells were identified in 83% of normal hair follicles and in 33.3% of normal epidermis. Conclusion.-A high proportion of apocrine CSs show folliculo-sebaceous differentiation. The presence of Merkel cells in foci of follicular differentiation of CS supports the hypothesis that Merkel cells may be an integral constituent of follicles. To our knowledge, the presence of Merkel cells in CS, particularly in proliferative form, has not been described previously in the literature.

Original languageEnglish (US)
Pages (from-to)986-990
Number of pages5
JournalArchives of Pathology and Laboratory Medicine
Volume128
Issue number9
StatePublished - Sep 1 2004

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Merkel Cells
Keratin-20
Pleomorphic Adenoma
Surgical Pathology
Hair Follicle
Osteogenesis
Epidermis
Sex Characteristics
Neck
Epithelium
Fats
Head
Skin

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine
  • Medical Laboratory Technology

Cite this

Chondroid syringoma : Cytokeratin 20 immunolocalization of merkel cells and reappraisal of apocrine folliculo-sebaceous differentiation. / Salama, Mohamed E.; Azam, Muhammad; Ma, Chan K.; Ormsby, Adrian; Zarbo, Richard J.; Amin, Mahul; Lee, Min W.

In: Archives of Pathology and Laboratory Medicine, Vol. 128, No. 9, 01.09.2004, p. 986-990.

Research output: Contribution to journalArticle

Salama, Mohamed E. ; Azam, Muhammad ; Ma, Chan K. ; Ormsby, Adrian ; Zarbo, Richard J. ; Amin, Mahul ; Lee, Min W. / Chondroid syringoma : Cytokeratin 20 immunolocalization of merkel cells and reappraisal of apocrine folliculo-sebaceous differentiation. In: Archives of Pathology and Laboratory Medicine. 2004 ; Vol. 128, No. 9. pp. 986-990.
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abstract = "Context.-Chondroid syringoma (CS) is a benign cutaneous adnexal tumor with epithelial and stromal components. Epithelial components derived from folliculo-sebaceous-apocrine germ are evident in apocrine but not in eccrine CS. Objectives.-To further characterize pilosebaceous differentiation and to identify the presence of Merkel cells in the areas of follicular differentiation. Design.-Histologic type, folliculo-sebaceous differentiation, character of stroma, and presence or absence of Merkel cells by cytokeratin (CK) 20 immunoreactivity were evaluated in 25 CSs (22 apocrine and 3 eccrine) from the surgical pathology files of Henry Ford Hospital (Detroit, Mich). Results.-Most CSs occurred in the head and neck region of patients aged 40 years or older. We found no significant difference in sex, age, or location between apocrine and eccrine types. The stroma varied from myxoid (100{\%}) to chondroid (59{\%}), with various amounts of fat (59{\%}) and ossification identified in 2 cases (9{\%}) of apocrine type, but was homogeneously myxoid in the eccrine type. Follicular and sebaceous differentiation was found in 64{\%} and 32{\%} of apocrine CSs, respectively. Only 2 (14{\%}) apocrine CSs with follicular differentiation were positive for CK20 (a few scattered cells in one case and numerous grouped cells in the other in association with follicular epithelium). No correlation was found between type of stroma and the presence of Merkel cells. Scattered Merkel cells were identified in 83{\%} of normal hair follicles and in 33.3{\%} of normal epidermis. Conclusion.-A high proportion of apocrine CSs show folliculo-sebaceous differentiation. The presence of Merkel cells in foci of follicular differentiation of CS supports the hypothesis that Merkel cells may be an integral constituent of follicles. To our knowledge, the presence of Merkel cells in CS, particularly in proliferative form, has not been described previously in the literature.",
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AU - Amin, Mahul

AU - Lee, Min W.

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