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Keratoacanthoma en plaque/nodule: A brief report of the clinicopathological features of five cases
Author(s) -
Misago Noriyuki,
Ansai Shinichi,
Fukumoto Takaya,
Anan Takashi,
Nakao Tomokazu
Publication year - 2017
Publication title -
the journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 65
eISSN - 1346-8138
pISSN - 0385-2407
DOI - 10.1111/1346-8138.13787
Subject(s) - keratoacanthoma , nodule (geology) , keratin , impact crater , pathology , medicine , anatomy , dermatology , biology , paleontology , basal cell , astrobiology
Keratoacanthoma ( KA ) is characterized by exoendophytic growth with a central keratin‐filled crater, representing the crateriform architecture. We herein report five rare cases of KA without a central keratin‐filled crater. These KA cases histopathologically showed that one or a few infundibular structures/isthmic lobules had their own open keratotic pores on the surface without a common merged keratotic plug/horn, clinically representing verrucous (keratotic) plaque/nodule, namely, “ KA en plaque/nodule”. KA rarely but on occasion does show verrucous plaque (or nodular) lesions without a central keratin‐filled crater, as the notion that KA invariably shows crateriform architecture is nonsensical.