Epithelioma adenoides cysticum (Brook1), tricho-epithelioma (Jarisch2), adenoma sebaceum (Pringle3) and syringoma (Jacquet and Darier4) are usually described as separate entities. This report is of a case which clinically and histopathologically fulfilled the requirements for a diagnosis of any of these diseases and which afforded evidence to regard them as manifestations of the same disease. Cylindroma belongs in the same group, as Watanabe5 and Stillians6 have shown.
The literature regarding epithelioma adenoides cysticum, trichoepithelioma, adenoma sebaceum, syringoma (syringocystadenoma or hydradénomes éruptifs), not to speak of adenoma of the sebaceous glands and cylindroma (nevus epithelioma cylindromatosis), is large and confusing. There is a multiplicity of names for each of the conditions just mentioned. Furthermore, a critical analysis of many cases revealed the histopathologic features of more than one condition and a disagreement in interpretation of similar pathologic findings. The pertinent literature was given by
INGELS AE. EPITHELIOMA ADENOIDES CYSTICUM WITH FEATURES OF SYRINGOMA. Arch Derm Syphilol. 1935;32(1):75–85. doi:10.1001/archderm.1935.01470010078007
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