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A Clinical Atlas of 101 Common Skin Diseases

Folliculitis (Infundibulitis) and Pseudofolliculitis (Pseudoinfundibulitis)

Infundibulitis, usually a suppurative inflammatory process that involves infundibula, is either noninfectious, as in the case of pustules of acne vulgaris, or infectious, as in the case of pustules caused by Staphylococcus aureus. In contrast, pseud…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

…hat is designated, universally, folliculitis is, in actuality, infundibulitis. In short, infundibulitis is NOT a synonym for folliculitis; the former, for purposes practical, is a suppurative process centered in infundibular epidermis, whereas the la…

Histologic Diagnosis of Inflammatory Skin Diseases

Infundibulitis secondary to medications systemic

Infundibulitis secondary to medications systemic Comment Findings histopathologic in infundibulitis secondary to medications administered systemically are no different from those in suppurative infundibulitis of any noninfectious cause, with the exc…

Histologic Diagnosis of Inflammatory Skin Diseases

Infundibulitis secondary to agents topical

Infundibulitis secondary to agents topical Comment Noninfectious infundibulitides can be divided roughly into those of cause internal and those of cause external. Examples of internal causes of suppurative infundibulitis are drugs of different kinds…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

Infundibulitis, usually a suppurative inflammatory process that involves infundibula, is either noninfectious, as in the case of pustules of acne vulgaris, or infectious, as in the case of pustules caused by Staphylococcus aureus. In contrast, pseud…

A Clinical Atlas of 101 Common Skin Diseases

Dermatophytosis

An inflammatory process caused by superficial fungi, i.e., fungi situated superficially in the cornified layer and in other cornified structures, and expressed clinically as smooth-surfaced papules, scaly papules, scaly plaques, nodules, pustules, v…

A Clinical Atlas of 101 Common Skin Diseases

Pyoderma Gangrenosum

An inflammatory process that often begins as a suppurative folliculitis manifested clinically as pustules. It rapidly extends to become ulcers marked at their periphery by boggy tissue. The skin disease is associated commonly with inflammatory bowel…

A Clinical Atlas of 101 Common Skin Diseases

Drug Eruptions

An inflammatory process that results from the effects of a drug administered systemically, e.g., by ingestion, inhalation, injection, or application rectally, and manifested usually by lesions distributed widely and symmetrically. Any of the many ex…

A Clinical Atlas of 101 Common Skin Diseases

Syphilis

An inflammatory process, caused by the spirochete Treponema pallidum, that tends to evolve through three stages, namely, primary (typified usually by a solitary chancre), secondary (characterized by widespread macules and papules on skin and mucous…

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