Search Results for: comedo

A pigmented flat lesion on the leg of a 72-year-old man

A pigmented flat lesion on the leg of a 72-year-old man

…c lesions are sometimes seen together in the same lesion [3]. Common dermoscopic features of SK include fissures and ridges, comedo-like openings, milia-like cysts and sharply demarcated borders [4,5]. Clonal SK is considered a rare variant…

Differential Diagnosis in Dermatopathology

Infundibular cyst vs. Isthmus-catagen cyst

Keratotic spikes that emerge from dilated ostia of infundibula and are equidistant from one another. The term keratosis pilaris refers to the phenomenon when it presents itself without any distinct arrangement of individual lesions, whereas the…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

Keratotic spikes that emerge from dilated ostia of infundibula and are equidistant from one another. The term keratosis pilaris refers to the phenomenon when it presents itself without any distinct arrangement of individual lesions, whereas the…

Papillary adenocarcinoma in situ of the skin: report of four cases

Papillary adenocarcinoma in situ of the skin: report of four cases

…athol. 2001;20:277-83. 3. Castelli E, Wollina U, Anzarone A, et al. Extramammary Paget disease of the axilla associated with comedo-like apocrine carcinoma in situ. Am J Dermatopathol. 2002;24:351-7. 4. Obaidat NA, Awamleh AA, Ghazarian DM….

Dermoscopic characteristics of nodular squamous cell carcinoma and keratoacanthoma

Dermoscopic characteristics of nodular squamous cell carcinoma and keratoacanthoma

…to be more predictive of seborrheic keratosis [33]. Seborrheic keratosis may also be pigmented and have milia-like cysts and comedo-like openings which aid diagnosis [35]. Merkel cell carcinoma is a rare tumor that may also mimic nodular SCC. Both…

Differential Diagnosis in Dermatopathology

Discussions

…, it may eventuate, in years, in pitted or hypertrophic scars or in tenacious sinus tracts of “acne conglobata.” Comedones traditionally have been described as “open” (blackheads) or “closed” (whiteheads). In…