Differential Diagnosis in Dermatopathology

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Apocrine (clear-cell) hidradenoma Eccrine (poroid) hidradenoma…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Apocrine (clear-cell) hidradenoma Eccrine (poroid) hidradenoma 1. Connects to infundibula often 1. No connection to infundibula; merges with surface epidermis rarely 2. Glandular structures usually 2. Ductal structures usually 3. “Dec…

Differential Diagnosis in Dermatopathology

Images

Apocrine mixed tumor Eccrine mixed tumor…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…th pale or clear cytoplasm 11. Infundibular, follicular, and sebaceous differentiation sometimes 11. No infundibular, follicular, or sebaceous differentiation 12. Stroma does not predominate throughout an entire lesion 12. Stroma, rather than epi…