β-Catenin acts as a structural protein at cell-cell adherens junctions and as a transcription activator mediating Wnt signal transduction. Altered β-catenin expression has been associated with loss of cell differentiation and acquisition of an invasive phenotype. In the present study, β-catenin expression was compared immunohistochemically between oral squamous cell carcinoma (30 cases) and ver...

Porokeratoses are uncommon hereditary or acquired keratinization disorders due to abnormal clones of keratinocytes in the epidermis. Porokeratoses have several clinical features which may occur simultaneously. A rare type is verrucous porokeratosis (VPK). Herein, we present a 47-year-old man with a 4-year history of perianal verrucous lesions and one year history of annular pruritic lesions on ...

OBJECTIVE To report on a series of vascular tumors of the iris. DESIGN Noncomparative case series. A retrospective medical record review of all patients with an iris vascular tumor was performed to identify the clinical features and develop a simple classification of these lesions. Included were demographics, clinical features, systemic associations, complications, management, and histopathol...

Abstract Introduction Verrucous squamous cell carcinoma is a rare tumour of the oesophagus with a few reported cases in the literature. While it is an uncommon malignancy, the natural history is substantially more favourable compared to adenocarcinoma and squamous cell carcinoma. A pre-operative tumour biopsy with unyielding results is not uncommon for this type of tumour. In the following repo...

Renal hemangioma is a rare tumor which can be capillary or cavernous. There have been less than 30 renal capillary hemangioma cases reported in the English literature. Herein we will report a case of renal hemangioma which was detected in a 74-year-old man operated with the impression of urothelial carcinoma of hilum.

BACKGROUND Oral verrucous hyperplasia (OVH) and oral verrucous carcinoma (OVC) are two distinct clinicopathologic verrucous lesions. However, the distinction between the two lesions still remains enigmatic. It is almost impossible to distinguish them clinically. Thus, the final diagnosis rests on the histopathological characteristics of both lesions, being distinguished from each other by an ex...

hemangioma is the most common benign cutaneous vascular tumor in infants and children. the hemangioma incidence in the neonates is 2% to 3% that increases to 10% in those younger than one year of age. before introduction of propranolol in 2008, different medications such as systemic corticosteroids and vincristine, with different side effects, were used for years. since then, over 200 studies c...

Melanoma is characterised by a variety of clinical and histopathological presentations. Dermoscopy is a fast, non-invasive technique that increases diagnostic accuracy for both melanocytic and non-melanocytic skin tumours. One example of a potential pitfall in melanoma diagnosis using dermoscopy is represented by seborrheic keratosis (SK) that looks like melanomas, which may show overlapping fe...

Peritumoral hyperplasia (PTH) is a hyperplastic lesion located around hypervascular tumors. Hepatic sclerosed hemangioma is a very rare form of hemangioma with sclerotic changes and is distinct from sclerosing hemangioma. We present a patient with non-alcoholic steatohepatitis-induced cirrhosis who presented with a hypervascular tumor. The tumor showed atypical findings of hemangioma and was tr...

Proliferative verrucous leukoplakia (PVL) is a particularly aggressive form of oral leukoplakia that is resistant to treatment and presents a high risk of recurrence and malignant transformation. This article describes the microscopic and clinical characteristics of one case of PVL, which initially presented as hyperkeratosis with mild dysplasia and posteriorly developed multifocal areas and ve...