Search Results for: infundibulitis

Differential Diagnosis in Dermatopathology

Lichen nitidus vs. Lichen striatus

…a foreign-body type of inflammatory process that results from penetration of the dermis by an ingrown hair. The phenomena of infundibulitis and pseudoinfundibulitis are referred to universally as “folliculitis” and…

Histologic Diagnosis of Inflammatory Skin Diseases

Seborrheic dermatitis

…f seborrheic dermatitis in some hemiparetics. Comment Seborrheic dermatitis basically is a spongiotic process, especially an infundibulitis, that can be differentiated from other spongiotic processes by proclivity of mounds of scale-crust for lips…

Differential Diagnosis in Dermatopathology

Tuberculoid leprosy vs. Sarcoidosis

…a foreign-body type of inflammatory process that results from penetration of the dermis by an ingrown hair. The phenomena of infundibulitis and pseudoinfundibulitis are referred to universally as “folliculitis” and…

Differential Diagnosis in Dermatopathology

Discussions

…to traction alopecia at the end of its course chronological. At a much earlier stage, traction alopecia is a lichenoid peri-infundibulitis/perifolliculitis in which lymphocytes predominate. The differential diagnosis of traction alopecia at that…

Histologic Diagnosis of Inflammatory Skin Diseases

Necrobiosis lipoidica

…ated by striking pseudocarcinomatous (infundibular) proliferation of keratocytes that tends to be accompanied by suppurative infundibulitis. That riveting finding is a clue helpful to differentiation of necrobiosis lipoidica from other palisaded…

Histologic Diagnosis of Inflammatory Skin Diseases

Mucha-Habermann disease

…s by arthropods, individual lesions are relatively similar to one another, and papules usually are not purpuric. Suppurative infundibulitis is pustular and because it affects infundibula, individual lesions are more or less equidistant from one…

Histologic Diagnosis of Inflammatory Skin Diseases

Keloid

…agen” is indistinguishable histopathologically from that of a true keloid. Keloids may develop at sites of suppurative infundibulitis (“folliculitis”), e.g., acne keloidalis, but not all papules and nodules of that condition show…