No abstract available.
Acanthoma*

Clear cell acanthoma (CCA) is an asymptomatic benign lesion of unknown origin that typically appears as a brownish, dome-shaped papule on the leg. It has an unusual clinical feature in that it appears as chronic eczema, Bowen disease, or Paget disease on the areola. Its histopathologic findings are well-demarcated psoriasiform acanthosis with pale keratinocytes (clear cells) that are rich in intracellular glycogen, which stain positively with Periodic acid-Shiff. We report herein on a young female patient with CCA on the areolar areas.
Acanthoma* ; Bowen's Disease ; Eczema ; Female ; Glycogen ; Humans ; Keratinocytes ; Leg ; Nipples

No abstract available.
Acanthoma* ; Humans* ; Scrotum*

No abstract available.
Acanthoma* ; Nose*

BACKGROUND: Keratoacanthoma (KA) can be clinically differentiated with ease from other dermatoses. However, the differential diagnosis of KA can sometimes be difficult, and some cases clinically suggest that the results of skin biopsies of lesions thought to be KA indicate other diseases. OBJECTIVE: The purpose of this study is to examine the diagnostic yield in submitting clinically diagnosed KA that showed solitary symmetric, firm, erythematous, or skin-colored nodules. METHODS: We retrospectively reviewed the clinical records of 54 patients with a clinical diagnosis or differential diagnosis of KA who received biopsies and visited the department of dermatology from January 2004 to December 2013. We compared clinical and histopathologic diagnoses and analyzed the rate of concurrence. In addition, clinical features, including age, sex, location, and duration were investigated. RESULTS: Of the patients, 40.7% were clinically diagnosed with KA, but the results of the histopathology tests indicated other diseases. The mean age of the patients with KA was 72.8 years, and the ratio of men to women was 1 : 0.92. Of the new patients, 0.07% had KA, and most of the lesion sites (84.0%) were caused by sun exposure. Other diseases that are more common in patients with KA are squamous cell carcinoma (55.2%), basal cell carcinoma (20.7%), seborrheic keratosis (6.9%), verruca vulgaris (6.9%), pyogenic granuloma (3.4%), clear cell acanthoma (3.4%), and Bowen's disease (3.4%). CONCLUSION: Skin lesions thought to be KA need more examinations, and skin biopsies of appearances of clinically atypical lesions that cannot completely exclude the possibility of precancerous or malignant lesions are strongly recommended.
Acanthoma ; Biopsy ; Bowen's Disease ; Carcinoma, Basal Cell ; Carcinoma, Squamous Cell ; Dermatology ; Diagnosis ; Diagnosis, Differential ; Female ; Granuloma, Pyogenic ; Humans ; Keratoacanthoma* ; Keratosis, Seborrheic ; Male ; Retrospective Studies ; Skin ; Skin Diseases ; Solar System ; Warts

Acanthoma ; pathology ; Humans ; Keratosis ; pathology ; Skin Neoplasms ; pathology

No abstract available.
Acanthoma* ; Scrotum*

Blue nevus is a neoplasm composed of pigmented dendritic dermal melanocytic cells in the reticular dermis. The lesion clinically presents as a well dermacated cerulean-blue or bluish black colored papule or plaque that usually measure less than 1 cm in diameter. Pilar sheath acanthoma is a rare, benign follicular hamartoma commonly affecting middle-aged and elderly individuals. It is characterized by a small, solitary, skin colored papule situated on the head and neck, particularly around the upper lip. We report a rare case of a blue nevus associated with a pilar sheath acanthoma in a 26 year-old man presented with a bluish papule on the neck.
Acanthoma* ; Aged ; Dermis ; Hamartoma ; Head ; Humans ; Lip ; Neck* ; Nevus, Blue* ; Skin

Clear cell acanthosis is a reaction pattern of the epidermis that can be observed as the chief histopathologic finding in clear cell acanthoma and as a focal change in other epidermal lesions, such as verruca vulgaris and seborrheic keratosis. Dermoscopy is a useful noninvasive tool that permits the visualization of key vascular structures that are usually not visible to the naked eye. A 63-year-old Korean man was presented with 2 year of a well-circumscribed, dome-shaped nodule on the nipple. Our patient represents patterns of both a clear cell acanthoma and a seborrheic keratosis on dermoscopic and histopathologic finding, but, notably, on dermoscopy vascular structures were more irregular linear distribution than classic clear cell acanthoma and different from dotted vessels shown in psoriasis. In this report, we describe a case of clear cell acanthosis in seborrheic keratosis for whom dermoscopy was used as a valuable diagnostic tool.
Acanthoma ; Dermoscopy ; Epidermis ; Eye ; Humans ; Keratosis, Seborrheic ; Nipples ; Psoriasis ; Warts

No abstract available.
Acanthoma ; Transplants