Search Results for: comedo

Differential Diagnosis in Dermatopathology

Discussions

…arely, eccrine duct cysts). Infundibular cysts develop especially on the face and upper part of the trunk. Not uncommonly, a comedo marks the center of them. They are slow-growing, round, and moderately firm orbs. On gross sectioning, a rancid odor…

Histologic Diagnosis of Inflammatory Skin Diseases

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

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…

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…

Pigmented eccrine poroma: dermoscopic and confocal features

Pigmented eccrine poroma: dermoscopic and confocal features

…lar vessels. Minagawa et al. [3] valuated PEP, describing 12 cases in which vascular structures, globule-like structures and comedo-like openings were the hallmarks. More recently, it has been shown that eccrine poroma might mimic several benign and…

In vivo reflectance confocal microscopy features of a melanoacanthoma

In vivo reflectance confocal microscopy features of a melanoacanthoma

…pathologically proven melanoacanthomas. All eight lesions had at least one dermoscopic feature associated with SK, including comedo-like openings, sharp demarcation, more than two milia-like cysts, ridges and fissures, moth-eaten borders, or hairpin…

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….