Intralesional methotrexate for keratoacanthoma: a case series from a Portuguese dermatology department

Background Keratoacanthoma (KA) is a rapidly growing epithelial proliferation, clinically characterized by a nodular lesion with a central hyperkeratotic keratin plug, occurring predominantly on sun-exposed areas of elderly individuals. The clinical and histopathological similarities between KA and cutaneous squamous cell carcinoma (cSCC), particularly its well-differentiated variant, make definitive distinction difficult or even impossible in many […]

Dermoscopy of facial flat pigmented lesions: a series of 406 cases

Introduction Seborrheic keratosis (SK), solar lentigo (SL), pigmented actinic keratosis (pAK), and lichenoid keratosis (LK) are common benign skin lesions. These lesions often appear near each other or may develop from one another. Pigmented facial lesions frequently present to physicians and can be challenging to distinguish because the differential diagnosis includes a wide range of […]

Evaluation of dyslipidemia among patients with chronic spontaneous urticaria: a cross-sectional study

Introduction Chronic urticaria is a distressing condition commonly encountered by dermatologists globally, characterized by recurrent transient itchy wheals and/or angioedema lasting for more than 6 weeks. It can be further categorized into spontaneous or inducible. The prevalence of chronic spontaneous urticaria (CSU) is estimated to be around 0.5-1% of the general population.1 CSU typically peaks […]