Search Results for: nerves

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Trichodiscoma Related to the Hair Disk and Merkel-Cell Neoplasm to Merkel Cells?

…r part of the dermis of mammals. The hair disk, composed of highly vascularized connective tissue and innumerable myelinated nerves, makes contact with Merkel cells that reside in the basal layer of the epidermis. Merkel cells are neuroendocrine…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…ined to the dermis, except for tuberous and tendinous types that affect the subcutaneous fat 11. Granular cells in cutaneous nerves 11. No foam cells in cutaneous nerves 12. Little fibrosis 12. Marked fibrosis at times 13. No extracellular lipid 13….

Differential Diagnosis in Dermatopathology

Granular-cell tumor vs. Xanthoma

An inflammatory disease caused by Mycobacterium leprae. It can involve internal organs or be localized to the skin, where its clinical presentation is dependent on the immunologic status of the host. Persons who are competent immunologically have…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eccrine Neoplasms?

…folliculo-sebaceous-apocrine units on one hand and eccrine units on the other; the nonepithelial adnexa are smooth muscles, nerves, and blood vessels. Each of those normal adnexal structures has its own distinctive histologic attributes that serve…

Spitz and Reed nevi: acquired or congenital?

Spitz and Reed nevi: acquired or congenital?

…al nevi, in particular, infiltration of the reticular dermis or subcutis and involvement of cutaneous appendages, vessels or nerves. As a common finding, melanocytes splay between collagen bundles singly or in double rows [4,10,11]. Recently, the…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Nevus Cells, Nevocytes, and Nevomelanocytes?

…dermis being derived from epidermal melanocytes, and nevomelanocytes in the lower dermis being derived from Schwann cells of nerves.” Rhodes AR. Neoplasms: benign neoplasias, hyperplasias, and dysplasias of melanocytes. In: Fitzpatrick TB,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Origin of Adnexal Neoplasms?

…gin of adnexal neoplasms, i.e., whether they derive from follicles, sebaceous units, apocrine units, eccrine units, muscles, nerves, or vessels (blood or lymphatic); only the direction of differentiation can be inferred. On the basis of study of…