Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Lentigo?

“Because lentigines are larger and more variegated than true freckles, they are not uncommonly biopsied to exclude melanocytic dysplasia or radial growth phase melanoma, such as lentigo maligna.” Murphy G. Melanocytic tumors. In: Derma…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Malignant Spitz Nevus?

…New York: Churchill-Livingstone, 2002. By definition, benign neoplasms are incapable of metastasis; only malignant neoplasms can disseminate by blood and lymph vessels and across serosal surfaces. Just one neoplasm of melanocytes is malignant, name…

Histologic Diagnosis of Inflammatory Skin Diseases

Suggested Readings

General Balkwill F (ed). Cytokine Cellular Biology: A Practical Approach (Practical Approach Series). Oxford: Oxford University Press, 2000. Darmon M, Blumenberg M (eds). Molecular Biology of the Skin: The Keratinocyte. San Diego: Academic Press, 19…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Sebaceous Epithelioma?

“Sebaceous epithelioma or sebaceoma. . . Sebaceous epithelioma, in contrast to sebaceous adenoma, grows in irregular masses and does not contain as many mature sebaceous cells.” Hashimoto K, Lever WF. Tumors of skin. In: Fitzpatrick TB…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Blue Nevus?

“Two forms [of blue nevus] exist, the rare being termed ‘cellular blue naevus.’ In the common variety bipolar and dendritic melanocytes lie singly or in masses in the dermis. . . . The cellular type is composed of the same element…

Differential Diagnosis in Dermatopathology

Seborrheic keratosis, acanthotic type vs. Eccrine poroma

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…