Back issues No.4 - 1989 / Case Report  

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I-Chung Horng, Aplha Cheng, Yok-Jen Chen, Yuan-Pi Lee, Yi-Huei Wang, Huei-Men Chen, Ko-Kaung Liao
Dermatol Sinica 7: 263-266, 1989

A 5-day-old female baby manifested by two peanut sized, brownish -colored, firm nodules presenting on left thigh. Darier's sign is positive. Histopathologic examination reveals many cuboidal-shaped mast cells lying closely packed in the upper dermis. Metachromatic granules in cytoplasma by toluidine blue stain are noted. Electron microscopic finding is characteristic of mastocytoma composed of Unna type mast cells.

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