Search Results for: hamartoma

Differential Diagnosis in Dermatopathology

Syringocystadenoma papilliferum vs. Hidradenoma papilliferum

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,…

Differential Diagnosis in Dermatopathology

Discussions

…atterns need not be present in a single section or even in a single specimen. The large nodular type is seen commonly in the hamartoma, nevus sebaceus. Often, the large nodules are pigmented heavily by melanin as a consequence of the activity of…

Segmental neurofibromatosis presenting with congenital excessive skin folds

Segmental neurofibromatosis presenting with congenital excessive skin folds

…agnoses of our patient’s cutaneous findings initially included nevus lipomatosus cutaneous superficialis, smooth muscle cell hamartoma, and nevus sebaceous. In addition, plexiform neurofibromas, sometimes present as loose, redundant skin folds…

Differential Diagnosis in Dermatopathology

Discussions

…e. Syringocystadenoma papilliferum is but one of many benign and malignant neoplasms that may arise within nevus sebaceus, a hamartoma marked by alterations of the dermis, the epidermis, and the epithelial structures of adnexa, as well at times of…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Infundibulo-folliculo-sebaceous cystic hamartoma Steatocystoma 1. Situated mostly in the dermis as a rule; sometimes also the subcutaneous fat 1. Situated in either the dermis or the subcutaneous fat, or both together 2. Cyst does not “pop…

A quiz from Manaus, Brazil

A quiz from Manaus, Brazil

…thosis or basaloid follicular induction [2]. Besides DF, an involutional sclerotic stage of other pre-existing inflammatory, hamartomatous or neoplastic lesion such as angiofibroma, neurofibroma, melanocytic nevus, lipoma, tendon sheath fibroma…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen striatus

…matory linear verrucous epidermal nevus is included here as an “inflammatory disease,” even though it truly is a hamartoma, the reason for that liberty being taken because clinically, and histopathologically, it resembles an inflammatory…

Differential Diagnosis in Dermatopathology

Discussions

…nuclei of fibrocytes in some collagenous nevi is their startling atypia. Connective tissue nevi of the skin, in general, are hamartomas that consist of alterations of one or more components of the extracellular matrix: collagen, elastin, and…