Search Results for: nerves

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Histologic Diagnosis of Inflammatory Skin Diseases

Subcutaneous Fat

…lomerations of subcutaneous adipocytes into lobules. The fibrous septa also house muscle-containing vessels, lymphatics, and nerves. (x25) Arteries and veins in the subcutaneous fat are positioned within the major fibrous septa (Figs. 1.87 and…

Histologic Diagnosis of Inflammatory Skin Diseases

Blood Vessels

…ures of adnexa (folliculosebaceous-apocrine units and eccrine units) and nonepithelial structures of adnexa (smooth muscles, nerves, and medium-sized and larger blood vessels). Figure 1.72 The dermal vasculature consists of a network of two plexuses…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermoepithelial Interface

…xa, i.e., hair follicles, sebaceous units, apocrine units, and eccrine units. Moreover, the vasculature and Schwann cells of nerves also are surrounded by a basement membrane. Figure 1.70 Basement membrane zone as seen through a conventional…

Histologic Diagnosis of Inflammatory Skin Diseases

Langerhans’ Cells

…epidermis where they seem to touch Langerhans” cells, thereby creating a link between the nervous and immune systems. Nerves, by virtue of release from them of neuropeptides, such as calcitonin gene-related peptide, are able to modulate the…

Histologic Diagnosis of Inflammatory Skin Diseases

Sebaceous Units

…positive, and by a thin, highly vascular zone of periadnexal connective tissue. Sebaceous glands are not innervated by motor nerves. The mite, Demodex folliculorum, is present commonly not only within infundibula, but also within sebaceous ducts of…

A new perspective on the nail plate for treatment of ingrown toenail

A new perspective on the nail plate for treatment of ingrown toenail

…1% lidocaine. The local anesthetic was administered circumferentially at the base of the hallux to block the plantar digital nerves and the ending sensory branches of the deep and superficial peroneal nerves. A tourniquet was fastened at the base of…

Waldenström macroglobulinaemia presenting as tingling ulcers on the feet

Waldenström macroglobulinaemia presenting as tingling ulcers on the feet

…op, develop later. The possible mechanisms in Waldenström macroglobulinaemia include microangiopathy, direct infiltration of nerves, endoneural deposition of IgM protein or amyloidosis, hyperviscosity or immunoglobulin deposit in blood vessels. The…

Dermoscopic findings in a patient with multiple piloleiomyomas

Dermoscopic findings in a patient with multiple piloleiomyomas

…1]. These tumors are painful on exposure to cold and trauma; pain could result from local pressure by the tumor on cutaneous nerves [3]. The main differential diagnosis consists of other dermal nodular lesions like dermatofibroma, eruptive…

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…

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…

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