Search Results for: comedo

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…are characterized clinically by dark casts of dilated infundibula dubbed by the laity “blackheads.” Figure 3.11 Comedo. Comedones may develop secondary to occlusion (such as by machine oils) and to severe longstanding damage by sunlight…

Hypertrophic lichen planus versus prurigo nodularis: a dermoscopic perspective

Hypertrophic lichen planus versus prurigo nodularis: a dermoscopic perspective

…ws). [Copyright: ©2016 Ankad et al.] Figure 3. Dermoscopy of hypertrophic lichen planus shows gray-blue globules (hexagons), comedo-like openings (arrows), brownish-black dots (circles) and red globules (stars). [Copyright: ©2016 Ankad et al.]…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.1.1A: Pustular dermatitis, infundibular + 10.1.1B: A comedo in association with granulomatous and fibrosing peri-infundibulitis = Acne vulgaris Many of the findings pictured here may be seen in other types of suppurative infundibulitis,…

Histologic Diagnosis of Inflammatory Skin Diseases

Algorithms Predicated on “Nonspecific” Findings

…= Keratosis pilaris (and its variant, lichen spinulosus) + No other findings on a face devoid of prominent solar elastosis = Comedo of acne vulgaris + On a face marked by extensive solar elastosis = Comedo of Favre-Racouchot disease + Infundibula…

Histologic Diagnosis of Inflammatory Skin Diseases

Acne vulgaris

…extend in bloated form into the subcutaneous fat. In short, acne vulgaris may be papular, pustular, or cystic, and devoid of comedones. All lesions of acne vulgaris, whether papular, pustular, or cystic, are centered in infundibular epidermis, not…

Differential Diagnosis in Dermatopathology

Discussions

…a comedo, dilated pore contains cornified cells arranged in basket-woven and laminate pattern, whereas cornified cells in a comedo are arranged compactly. Furthermore, comedones do not have rete ridges along the sides of the infundibular…