Histologic Diagnosis of Inflammatory Skin Diseases

Embryologic Development

…the isthmus of the hair follicle, actually is not part of the folliculosebaceous unit, but is epidermis, that particular epithelium being divisible morphologically in two parts continuous with each other, that is, surface and infundibular. The apocri…

Differential Diagnosis in Dermatopathology

Dilated pore vs. Pilar sheath acanthoma

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…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Basal-Cell Carcinoma Common in Nevus Sebaceus?

…ies and benign tumors of the epidermis and appendages. Syringocystadenoma papilliferum and basal-cell carcinoma are the most frequently found complications.” Serpas De Lopez RME, Hernandez-Perez E. Jadassohn’s sebaceous nevus. J Dermatol…

Differential Diagnosis in Dermatopathology

Discussions

…orange color that reflects abundant lipid present in numerous sebaceous lobules of different sizes and shapes. In late lesions, many other abnormalities may become manifest in nevus sebaceus, especially syringocystadenoma papilliferum, various benign…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…nin nor melanocytes are present in the lining epithelium 8. Sebaceous (bluish granular) material among the cyst contents 8. No sebaceous material among the cyst contents 9. No cholesterol clefts within a cyst 9. Cholesterol clefts within a cyst o…

Differential Diagnosis in Dermatopathology

Discussions

…is emitted as a consequence of the effects of bacteria on the sebaceous material within them. Sebaceous secretion enters infundibular cysts from lobules of sebaceous glands via sebaceous ducts that are continuous with the base of them. When infundibu…