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      The cytology of giant solitary trichoepithelioma

      case-report

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          Abstract

          Giant solitary trichoepithelioma (GST) is a rare trichogenic tumor, which may present as a pigmented lesion. An 80-year-old man was diagnosed to have giant solitary trichoepithelioma on fine-needle aspiration cytology. The cytological findings represented the histological features. The recognition of GST is important because of its close resemblance to basal cell carcinoma and other skin adnexal tumors – clinically, cytologically and histologically.

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          Microcystic adnexal carcinoma: a distinct clinicopathologic entity.

          Alexis R. Barr, Bernard Goldstein, Fátima Cruz (1982)
          Microcystic adnexal carcinoma is an unusual locally aggressive neoplasm that is important to recognize since it may be confused with benign adnexal neoplasms, particularly desmoplastic trichoepithelioma, trichoadenoma, and syringoma. Six cases are described all of which displayed benign histological features on initial biopsy. Most often these neoplasms presented as solitary flesh-colored indurated plaques on the upper lip. All patients were white, five were women, and the average age was 44-years-old. Islands of basaloid keratinocytes, some of which contained horn cysts and abortive follicles, were embedded in a desmoplastic stroma. In other foci, ducts and gland-like structures lined by a two-cell layer predominated. In deep components individual and thin strands of cells dissected collagen bundles and skeletal muscle and invaded perineural spaces. Despite this, cytologic atypia and mitotic figures were rare. The cell of origin is considered to be a pluripotential adnexal keratinocyte which is capable of both follicular and sweat gland differentiation.
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            Trichoepithelioma: a 19-year clinicopathologic re-evaluation.

            C Shea, Luís Bettencourt, V Prieto (1999)
            Accurate histopathologic distinction between trichoepithelioma (TE) and basal cell carcinoma (BCC) may be challenging. From 97 cases diagnosed as TE during the period 1979-1997, 73 available cases were studied with regard to: 1) stroma; 2) retraction effect; 3) papillary-mesenchymal bodies (PMB); 4) amyloid; 5) mitotic figures; 6) apoptotic cells; 7) inflammation; 8) granuloma; and 9) calcification. A judgment was made regarding diagnosis. The patients' medical records were subsequently reviewed for clinical features and possible recurrence. The diagnosis of TE was confirmed histologically in 48 (65%) of 73 cases. Fifteen cases (21%) were reclassified as BCC (RC-BCC), eight other cases (11%) were reclassified as other lesions, and two additional cases (3%) could not be confidently classified as either TE or BCC. The most helpful differentiating features were the presence of retraction effect (in 100% of RC-BCC vs. 37% of TE), myxoid stroma (in 80% of RC-BCC vs. 12% of TE) and PMB (in 20% of RC-BCC vs. 81% of TE). Unexpected findings in TE were detection of amyloid in 33%, apoptotic cells in 100%, and mitotic figures in 46%. Five of the 15 RC-BCC have recurred (33%), whereas there have been no recurrences in the confirmed TE group. A constellation of histopathologic criteria may help to discriminate problematic examples of trichoepithelioma from basal cell carcinoma.
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              Giant solitary trichoepithelioma.

              Clarissa Matos, Nivaldo H Toppa, Kathryn da Silva … (1984)
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                Author and article information

                Journal
                Journal ID (nlm-ta): J Cytol
                Journal ID (publisher-id): JCytol
                Title: Journal of Cytology / Indian Academy of Cytologists
                Publisher: Medknow Publications (India )
                ISSN (Print): 0970-9371
                ISSN (Electronic): 0974-5165
                Publication date (Print): July 2010
                Volume: 27
                Issue: 3
                Pages: 99-101
                Affiliations
                Department of Pathology, Medical College (VIMS), Bellary, Karnataka, India
                Author notes
                Address for correspondence: Dr. Jayashree Krishnamurthy, Associate Professor, Department of Pathology, Medical College (VIMS), Bellary – 583 104, Karnataka, India. E-mail: bargavisaranga@ 123456gmail.com
                Article
                Publisher ID: JCytol-27-99
                DOI: 10.4103/0970-9371.71874
                PMC ID: 2983083
                PubMed ID: 21187885
                SO-VID: 2bb97a0d-f96e-4929-bbe5-fa4d9eb10888
                Copyright © © Journal of Cytology
                License:

                This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Categories
                Subject: Case Report

                ScienceOpen disciplines: Pathology
                Keywords: basal cell carcinoma,trichoblastoma,giant solitary trichoepithelioma,fnac,microcystic adnexal carcinoma
                Data availability:
                ScienceOpen disciplines: Pathology
                Keywords: basal cell carcinoma, trichoblastoma, giant solitary trichoepithelioma, fnac, microcystic adnexal carcinoma

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