Abstract:
:Merkel cell carcinoma (MCC) is a rare primary neuroendocrine carcinoma of the skin, usually occurring at sun-exposed sites in elderly people. Divergent differentiation in MCC, although rare, has been reported in previous case series. We describe two new cases of MCC with divergent differentiation. Patient 1 was a 96-year-old man with a scalp lesion; on biopsy, the morphology and immunoprofile suggested MCC with divergent squamous differentiation. Patient 2 was an 87-year-old woman with a lesion on her leg, originally reported as squamous cell carcinoma, later showing extensive local recurrence. On review, primary histology showed an MCC with divergent differentiation, most likely trichilemmal carcinoma; the recurrence showed only MCC. These cases illustrate that MCC is capable of divergent differentiation, including squamous and adnexal morphologies. Correct diagnosis is essential for appropriate prognosis and management, as later recurrence or metastases may only show the Merkel cell component.
journal_name
Clin Exp Dermatoljournal_title
Clinical and experimental dermatologyauthors
Gaitskell K,Nassar S,Ibrahim Hdoi
10.1111/ced.14110subject
Has Abstractpub_date
2020-04-01 00:00:00pages
327-332issue
3eissn
0307-6938issn
1365-2230journal_volume
45pub_type
杂志文章abstract::The Langerhans cells in the lentigines of four patients with the Leopard syndrome contained large membrane bound accumulations of melanin granules. Giant melanosomes were only seen in two patients. The patients had no immune-based symptoms relating to their lentigines. The Leopard Syndrome, also known as multiple lent...
journal_title:Clinical and experimental dermatology
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doi:10.1111/j.1365-2230.1992.tb02524.x
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Clinical and experimental dermatology
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