Inverted Follicular Keratosis Key Points Inverted follicular keratosis (IFK) is a rare benign epithelial tumor It originates from the infundibular portion of the hair follicle Ninety percent of IFK cases…

Intravascular Papillary Endothelial Hyperplasia Key Points Intravascular papillary endothelial hyperplasia is a vascular lesion that usually arises in veins or arteries It is a reactive lesion representing an unusual form…

Infantile Hemangioma Key Points Infantile hemangiomas are the most common benign soft-tissue tumors of infancy and childhood The pathogenesis of hemangiomas is not clearly understood Most cases are sporadic and…

Impetigo Key Points Impetigo is a highly contagious bacterial skin infection It is most common in warm tropical climates, with crowded living conditions, poor hygiene, and lower socioeconomic conditions Impetigo…

Ichthyosis Key Points Ichthyosis is a heterogeneous group of disorders characterized by abnormal cutaneous keratinization with scale formation These are divided into nonsyndromic and syndromic forms of inherited ichthyoses and…

Hidrocystoma Key Points Hidrocystomas are benign cystic lesions of sweat glands seen most commonly on the face, especially on the eyelids Hidrocystomas are categorized into apocrine and eccrine types Apocrine…

Hidradenoma Key Points Most hidradenomas are probably of apocrine rather than eccrine origin Fifty percent of hidradenomas harbor the t(11;19) translocation: the fusion of MECT1 gene on chromosome 19p13, with…

Herpes Zoster Ophthalmicus Key Points The varicella-zoster virus is one of the three members of the α-herpesvirus subfamily and is the etiologic agent of varicella (chickenpox) and herpes zoster (shingles)…

Herpes Simplex Blepharitis Key Points Herpes simplex is a virus transmitted chiefly by kissing or other forms of intimate contact Once the primary infection is over, the HSV-1 virus ascends…

Granulomatosis With Polyangiitis Key Points Granulomatosis with polyangiitis (GPA) is a chronic multisystem vasculitic autoimmune disease that is more common in older white males It was previously referred to as…