Pigmented Lesions

Pigmented Lesions

Non-melanocytic lesions Inflammatory Post-inflammatory hyperpigmentation¬†(523, 649) Melanophages in number variable scattered in the papillary dermis, rarely in the upper part of the reticular dermis too. Melanin increased in amount in the epi…

Differential Diagnosis in Dermatopathology

Nodular fasciitis vs. Malignant fibrous histiocytoma

A malignant nonepithelial neoplasm (a sarcoma) presumably of perineural fibrocytes that presents itself usually on the trunk, but sometimes elsewhere, such as the extremities, face, and scalp. A papule of it tends to become a plaque, a nodule, a tum…

Differential Diagnosis in Dermatopathology

Discussions

Both nodular fasciitis and malignant fibrous histiocytoma are comprised of oval and spindle cells, some of which are arranged in fascicles that appear to be intertwined and may involve the lower part of the dermis, subcutaneous fat, fascia, and skel…

Differential Diagnosis in Dermatopathology

See Classification of Pigmented Lesions

Non-melanocytic lesions Inflammatory Post-inflammatory hyperpigmentation Dermatofibroma Hamartomas Collagenous nevus, papillary dermal type Nevoid hyperkeratosis of the nipple Benign neoplasms Solar lentigo, including lichen planus-like ker…

Differential Diagnosis in Dermatopathology

Images

Dermatofibroma Dermatofibrosarcoma protuberans…