Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cytophagic Panniculitis?

“Two cases of what was originally called Weber-Christian disease were found to be a chronic, recurrent form of histiocytic panniculitis characterized by histiocytic engulfment of red and white blood cells—cytophagocytosis. The disease…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…asse 8. Few mitotic figures 8. Many mitotic figures 9. No hyaline globules 9. Hyaline globules in some endothelial cells 10. Few plasma cells 10. Many plasma cells 11. No thin-walled, bizarre-shaped vessels 11. Bizarre-shaped vessels lined b…

Dermatology Practical & Conceptual

Tufted hemangioma: clinical case and literature review

Abstract Tufted hemangiomas are relatively rare benign vascular proliferations that are congenital or appear during the first years of life. Herein we present an additional case of tufted hemangioma that appeared one year after birth and discuss its…

Dermatology Practical & Conceptual

Widespread pruritic papules on the trunk and extremities

The patient A 42-year-old Caucasian man presented with a 15-year history of a widespread, persistent, pruritic eruption over his trunk and extremities. He was not on medication and had no relevant family history. On physical examination, multiple di…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermatofibroma

Dermatofibroma Synonyms Benign fibrous histiocytoma Fibroma dura Subepidermal nodular sclerosis Histiocytoma Histiocytoma cutis Sclerosing hemangioma Fibroma simplex or fibroma durum Nodulus cutaneus Fibrome en Pastille Dermatofibroma lenticulare De…

Dermatology Practical & Conceptual

Dermatoscopic pattern of a cylindroma

Case report A 65-year-old man presented with an asymptomatic lesion on the left parietal scalp of 6 months’ duration. Three years prior, a cylindroma on the same area was excised by a general surgeon. Physical examination revealed a solitary 6 mm sa…

Differential Diagnosis in Dermatopathology

Discussions

The effects of products of dense, often bandlike infiltrates of lymphocytes can drive both lichen planus-like keratosis and primary cutaneous melanoma into regression, i.e., involution (as they can the type of melanocytic nevus picturesquely termed…

Differential Diagnosis in Dermatopathology

Discussions

Both pyogenic granuloma and Kaposi’s sarcoma consist of proliferations of endothelial cells, and both are hyperplasias. In most instances, papules and nodules of Kaposi’s sarcoma are differentiated easily by microscopy conventional from…