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…

Granuloma Annulare Key Points Granuloma annulare is a benign dermatological condition that occurs in healthy children It occurs clinically as several different forms, including generalized, subcutaneous, and perforating variants The…

Glomuvenous Malformation (Glomus Tumor) Key Points Glomuvenous malformation is a rare benign hamartoma of the glomus body The pathogenesis and genetics of sporadic GVM are poorly understood but BRAF or…

Fibrous Histiocytoma Key Points Fibrous histiocytoma (FH) is a soft-tissue tumor characterized by a proliferation of spindle-shaped cells, usually admixed with inflammatory cells It is believed to originate from a…

Erythema Multiforme Key Points Erythema multiforme (EM) is an acute, self-limited or recurrent, immune-mediated disorder that affects the skin and mucous membranes Clinically, EM is classified as EM minor and…