background : seborrheic keratosis is a common, benign skin tumor. numerous reports have shown its possibility of malignant transformation. this study was designed to demonstrate the occurrence of concomitant seborrheic keratosis and skin cancers. methods : data was retrospectively reviewed from all patients with a diagnosis of seborrheic keratosis in pathology department of alzahra hospital and...

Seborrheic keratosis is a benign epithelial neoplasia that occurs mainly in the skin of the eyelids and face. We describe a case of seborrheic keratosis of the conjunctiva confirmed by histopathology. A 72-year-old man presented with a recurrent conjunctival mass involving the nasal side of his right eye. Clinically, a diagnosis of conjunctival papilloma was made, and a mass excision was perfor...

OBJECTIVE To estimate the prevalence of melanoma clinically mimicking seborrheic keratosis. DESIGN Retrospective review of cases submitted for histological examination with a clinical diagnosis of seborrheic keratosis or with a differential diagnosis that included seborrheic keratosis. SETTING A tertiary medical care center-based dermatopathology laboratory serving academic dermatology clin...

Seborrheic Keratosis is a benign skin lesion which develops from the proliferation of keratinocytes of the epidermis. There are very few case reports of seborrheic keratosis occurring over the nipple and areola. Pigmented seborrheic keratosis can be easily mistaken for malignant melanoma. Its occurrence may be associated with internal malignany (Leser-Trelat sign). We report a case of pigmented...

BACKGROUND Computer-aided image analysis (CAIA) has been suggested as an effective diagnostic tool for pigmented skin lesions (PSLs), especially melanoma. However, few studies on benign PSLs have been reported. OBJECTIVE The purpose of this study was to evaluate benign PSLs with our CAIA software and analyze the differences between the parameters of those lesions. METHODS By using homegrown...

Clinical observations and an expanding knowledge of cell-to-cell communication have led us to speculate that the finding of a melanocytic nevus in conjunction with a seborrheic keratosis is more than a coincidental collision of two lesions. Here we present five cases demonstrating dermoscopic features of both melanocytic lesions and seborrheic keratoses with corresponding histology. Four cases ...

BACKGROUND Seborrheic keratosis is a common, benign skin tumor. Numerous reports have shown its possibility of malignant transformation. This study was designed to demonstrate the occurrence of concomitant seborrheic keratosis and skin cancers. MATERIALS AND METHODS Data was retrospectively reviewed from all patients with a diagnosis of seborrheic keratosis in pathology department of Alzahra ...

To the Editor: Seborrheic keratosis is one of the most common benign epidermal tumors in dermatologic clinical practice. Although the association between seborrheic keratosis and other skin tumors was first reported in 1932, its malignant transformation is very rare, with less than 20 published cases. We present the case of a patient with seborrheic keratosis that underwent transformation into ...

Seborrheic keratosis is a common skin lesion which may coincidentally be associated melanocytic nevi. The authors describe a case of dysplastic nevus associated with seborrheic keratosis and discuss the clinical, dermoscopic, and histological findings of this association. They also discuss the association between seborrheic keratosis and other benign and malignant tumours.

A brief review of the variations of microscopic appearances of seborrheic keratosis is presented. Figure 1 Seborrheic keratosis: Acanthotic type (Figure 1) Although no exact data are available for percentage distribution of different histologic subtypes of seborrheic keratosis, the acanthotic type appears to be the most common. This type shows marked acanthosis of predominantly basaloid cells [...