We reviewed 17 cases of inverted follicular keratosis. The median age of the patients at the time of surgery was 69 years. Follow-up in 14 cases showed no recurrences of inverted follicular keratosis, which is a benign skin lesion, often mistaken clinically and pathologically for a malignancy. Inverted follicular keratosis is characterized histologically by the presence of squamous eddies, acan...

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.

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 ...

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 [...

Cutaneous melanoma may in some instances be confused with seborrheic keratosis, which is a very common neoplasia, more often mistaken for actinic keratosis and verruca vulgaris. Melanoma may clinically resemble seborrheic keratosis and should be considered as its possible clinical simulator. We report a case of melanoma with dermatoscopic characteristics of seborrheic keratosis and emphasize th...

Actas Dermosifiliogr. 2009;100:615-34 619 7. Menzies SW, Westerhoff K, Rabinovitz H, Kopf AW, McCar thy WH, Katz B. Sur face microscopy of pigmented basal cel l carcinoma. Arch Dermatol. 2000;136: 1012-6. 8. Zaballos P, Blázquez S, Puig S, Salsench E, Rodero J, Vives JM, et al. Dermoscopic pattern of intermediate stage in seborrhoeic keratosis regressing to lichenoid keratosis: report of 24 cas...

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 ...

1. van Osch LD, Oranje AP, Keukens FM, Voorst Vader van PC, Veldman E. Keratosis follicularis spinulosa decalvans: A family study of seven male cases and six female carriers. J Med Genet 1992;29:36-40. 2. Fong K, Wedgeworth EK, Lai-Cheong JE, Tosi I, Mellerio JE, Powell AM, et al. MBTPS2 mutation in a British pedigree with keratosis follicularis spinulosa decalvans. Clin Exp Dermatol 2012;37:63...

1. Rossi R, Mori M, Lotti T. Actinic keratosis. Int J Dermatol. 2007;46:895--904. 2. Schaefer I, Augustin M, Spehr C, Reusch M, Kornek T. Prevalence and risk factors of actinic keratoses in Germany----analysis of multisource data. J Eur Acad Dermatol Venereol. 2014;28:309--13. 3. Naldi L, Chatenoud L, Piccitto R, Colombo P, Placchesi EB, La Vecchia C, et al. Prevalence of actinic keratoses and ...