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Differential Diagnosis in Dermatopathology

Pale-cell acanthoma vs. Psoriasis, plaque expression

Noninflammatory scaly disorders in which polygonal gray or brown scales tend to be elevated at their periphery, causing them to appear to be separated from contiguous scales, findings that are seen in three conditions, namely, ichthyosis vulgaris (a…

Differential Diagnosis in Dermatopathology

Trichoepithelioma vs. Infundibulocystic basal-cell carcinoma

Noninflammatory scaly disorders in which polygonal gray or brown scales tend to be elevated at their periphery, causing them to appear to be separated from contiguous scales, findings that are seen in three conditions, namely, ichthyosis vulgaris (a…

Dermatology Practical & Conceptual

Large cell acanthoma: a debate throughout the decades

Have we really concluded what a large cell acanthoma is? Is it a distinct entity, a solar lentigo, a subtype of seborrheic keratosis, or an HPV-induced acanthoma? In 1970, large cell acanthoma (LCA) was first described by Pinkus, as a sharply demarc…

Differential Diagnosis in Dermatopathology

Lymphocytoma cutis with lymphoid follicles vs. Follicular-cell lymphoma

Noninflammatory scaly disorders in which polygonal gray or brown scales tend to be elevated at their periphery, causing them to appear to be separated from contiguous scales, findings that are seen in three conditions, namely, ichthyosis vulgaris (a…

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