© 2010 The Authors. doi: 10.2340/00015555-0800 Journal Compilation © 2010 Acta Dermato-Venereologica. ISSN 0001-5555 Sir, Porokeratosis (PK) is a heterogeneous group of hereditary or acquired disorders of keratinization with a broad clinical spectrum and various aetiologies. Common to all PK is the typical histological feature of a cornoid lamella, which corresponds to the hyperkeratotic rim of...

Disseminated superficial actinic porokeratosis is a rare photodistributed disorder that has occasionally been reported in association with psoriasis. Treatment of psoriasis with phototherapy may trigger the onset of porokeratosis in some cases. In other cases, the coexistence of these disorders may be coincidental. Clinical inspection of lesions of coexisting porokeratosis and psoriasis reveals...

A 15-year-old girl underwent allogenic bone marrow transplantation for neuroblastoma. few years later, she noticed a round lesion on her left buttock. Since the had been asymptomatic and never grown, more than 20 passed before saw local doctor to consult about it. Although was suspected be tinea corporis, no fungi were found microscopic examination. Subsequently, administered topical corticoste...

Sir, Disseminated porokeratosis palmaris and plantaris (DPPP), a subtype of porokeratosis Mibelli, is a rare autosomal dominant genodermatosis first described by Guss et al. in 1971 (1). An early review of the literature showed that 7% of 250 patients with porokeratosis subsequently developed skin tumours (2). Squamous cell carcinomas (SCC), Bowen’s disease (BD), and rarely, basal cell carcinom...

Porokeratosis is an abnormal disease of keratinization of epidermis. It is clinically characterized by margins covered with keratin layer and it typically has an atrophied macule with a protruded, circular form. Histopathologically, it shows the findings of cornoid lamella. Risk factors for its development include organ transplantation, long-term use of corticosteroids, immunocompromised status...

Porokeratosis is a rare disease of epidermal keratinization characterized by the histopathological feature of the cornoid lamella, a column of tightly fitted parakeratocytic cells, whose etiology is still unclear. Porokeratosis of Mibelli is a subtype of porokeratosis presenting a single plaque or a small number of plaques of variable size located unilaterally on limbs. It frequently appears in...

OBJECTIVES The purpose of this clinical study was to identify a clinical and histopathological relationship between verrucous hyperplasia, verrucous keratosis, and verrucous carcinoma. METHODS We evaluated 12 patients who had developed oral verrucous carcinoma in the past 10 years in a follow-up study. In this study, the diagnostic criteria included clinical and histopathological features of ...

a variety of verrucous and papillary lesions affect the oral mucosa. Those which are benign and reactive, for example squamous papilloma or verruciform xanthoma, usually present little diagnostic difficulty. However, dysplastic and malignant verrucous and papillary lesions are a much greater diagnostic challenge, not helped by confusing terminology. papillary hyperplasia is a reactive inflammat...

Verrucous Carcinoma is a rare, slow growing, well-differentiated squamous cell Carcinoma. In this case, we report the situation of aggressive, verrucous carcinoma in hard palate beyond midline and extends to maxillary sinus.

Inguinal and genital porokeratosis are rare but seem to be more common in Asians. We report a case of a 69-year-old Japanese man with multiple lesions of porokeratosis in both inguinal regions. The lesions first appeared in the inguinal region and subsequently spread to the trunk. The patient reported that his father had had similar lesions. Dermoscopy demonstrated central brown pigmentation an...