Differential Diagnosis in Dermatopathology

Spitz’s nevus, compound type vs. Melanoma

A malignant neoplasm of melanocytes that, in the skin, begins as a macule and may become a patch or a papule. A flat lesion of melanoma tends to be asymmetrical, poorly circumscribed with a scalloped, jagged, or notched border, and variegate, mostly…

Differential Diagnosis in Dermatopathology

Nevus verrucosus vs. Acanthosis nigricans

A malignant neoplasm of melanocytes that, in the skin, begins as a macule and may become a patch or a papule. A flat lesion of melanoma tends to be asymmetrical, poorly circumscribed with a scalloped, jagged, or notched border, and variegate, mostly…

Differential Diagnosis in Dermatopathology

Verrucous seborrheic keratosis vs. Verrucous epidermal nevus

A malignant neoplasm of melanocytes that, in the skin, begins as a macule and may become a patch or a papule. A flat lesion of melanoma tends to be asymmetrical, poorly circumscribed with a scalloped, jagged, or notched border, and variegate, mostly…

Differential Diagnosis in Dermatopathology

Morphea, late stage vs. Collagenous nevus

A malignant neoplasm of melanocytes that, in the skin, begins as a macule and may become a patch or a papule. A flat lesion of melanoma tends to be asymmetrical, poorly circumscribed with a scalloped, jagged, or notched border, and variegate, mostly…

Dermatology Practical & Conceptual

Spitz and Reed nevi: acquired or congenital?

…or even balloonized or neuroid shapes. The overall silhouette of superficial and deep or deep congenital nevi like Zitelli nevus, Miescher nevus or blue type nevi is band-like or, more frequently, wedge-shaped [1]. From a dermatoscopic point of view…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Halo Phenomenon?

…98(6):663–68. “HALO PHENOMENA AROUND LESIONS OTHER THAN NEVUS CELL NEVUS Halos of hypopigmentation may occur around a variety of pigmented lesions, including neurofibroma, flat warts, neurotized nevus, blue nevus, garment nevus, Spitz nevus, a…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Study By Disease

…mas in a patient with Muir-Torre syndrome (Quiz #72) Sebaceous nevus (not nevus sebaceus of Jadassohn) (Quiz #444) Seborrheic dermatitis (Quiz #770) Seborrheic keratosis (Quiz #26) Seborrheic keratosis (Quiz #49) Seborrheic keratosis (Quiz #506) Sebo…