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Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Langerhans’ Cell Granulomatosis?

“The cells of histiocytosis X [HX] have been designated “histiocytes” but the “ordinary” histiocytes encountered in healthy skin, in histiocytoma or various granulomatous processes are devoid of the granules. It could…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Lentigo Maligna?

…remalignant dysplasia).” Elder DE, Murphy GF. Malignant tumors (melanomas and related lesions). In: Atlas of Tumor Pathology: Melanocytic Tumors of the Skin. Washington, D.C.: Armed Forces Institute of Pathology, 1991; Third Series, Fascicle 2…

Differential Diagnosis in Dermatopathology

Apocrine (clear-cell) hidradenoma vs. Eccrine (poroid) hidradenoma

…nd scalp. A papule of it tends to become a plaque, a nodule, a tumor, or all of them concurrently. Sometimes a plaque is interspersed with many nodules and tumors in a cluster. The sarcoma is "low grade," i.e., it metastasizes only episodic…

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