Search Results for: perifolliculitis

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…220;follicular occlusion triad,” i.e., acne conglobata, perifolliculitis abscedens et suffodiens, and hidradenitis suppurativa, in essence, are suppurative “infundibulitides” that progress to suppurative granulomatous and, eventuall…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…e in a lesion of psoriasis. Figure 3.16 Fissure. FOLLICULITIS/PERIFOLLICULITIS: An inflammatory disease in which the infiltrate of inflammatory cells is present either in or around follicular epithelium, that is, epithelium of the isthmus, stem, and…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Fibrosing Dermatitis

…ibrosing dermatitis (as well as fibrosing peri-infundibulitis/perifolliculitis and fibrosing panniculitis) results, in every instance, from injury to nonepithelial tissue, usually connective tissue, the assault coming either from outside or from insi…

Differential Diagnosis in Dermatopathology

Lichen nitidus vs. Lichen striatus

A disease of infundibulosebaceous units, especially infundibula, that may manifest itself solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

…re. Br J Dermatol 2002;146(2):314-16. Colcott Fox T. Pustular perifolliculitis. In: System of medicine. Allbutt & Rolleston, 1911;9:188. Culver GD. Perforating folliculitis naris. Arch Dermatol 1927;15:16. Dyall-Smith D, Mason G. Fungal eosinophi…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…er is able to contain contents of it, some of which are dispersed into the dermis where they induce suppurative peri-infundibulitis that progresses to granulomatous perifolliculitis and, eventually, to fibrosing peri-infundibulitis pictured here….

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…Spongiosis in infundibula often 16. No peri-infundibulitis or perifolliculitis 16. Peri-infundibulitis and perifolliculitis common 17. No eccrine adenitis 17. Eccrine adenitis sometimes 18. Infiltrate of inflammatory cells not aligned along epithelia…

Histologic Diagnosis of Inflammatory Skin Diseases

Algorithms Predicated on “Nonspecific” Findings

…+ No other findings usually and not on a face; granulomatous perifolliculitis if the wall of the infundibulum has been breached = Keratosis pilaris (and its variant, lichen spinulosus) + No other findings on a face devoid of prominent solar elastosi…

Histologic Diagnosis of Inflammatory Skin Diseases

Drug eruptions

…ny of findings histopathologic alone. Peri-infundibulitis and perifolliculitis A lichenoid drug eruption may have a predilection, rarely, for the infundibulum and follicle, rather than for surface epidermis. In that situation, the changes histopathol…

Differential Diagnosis in Dermatopathology

Discussions

…anges, clinical and histopathologic, being just like those of perifolliculitis abscendens et suffodiens, known also, and erroneously, as dissecting cellulites of the scalp, and hidradenitis suppuration, which is not hidradenitis truly but explosive s…