Onychomycosis: A fungal infection of the nail, usually caused by DERMATOPHYTES; YEASTS; or nondermatophyte MOLDS.Foot Dermatoses: Skin diseases of the foot, general or unspecified.Hand DermatosesTrichophyton: A mitosporic fungal genus and an anamorphic form of Arthroderma. Various species attack the skin, nails, and hair.Arthrodermataceae: A family of ascomycetous fungi, order Onygenales, characterized by smooth ascospores. Genera in the family include Arthroderma, Keratinomyces, and Ctenomyces. Several well-known anamorphic forms are parasitic upon the skin.Nails: The thin, horny plates that cover the dorsal surfaces of the distal phalanges of the fingers and toes of primates.LacquerTinea Pedis: Dermatological pruritic lesion in the feet, caused by Trichophyton rubrum, T. mentagrophytes, or Epidermophyton floccosum.Microsporum: A mitosporic Oxygenales fungal genus causing various diseases of the skin and hair. The species Microsporum canis produces TINEA CAPITIS and tinea corporis, which usually are acquired from domestic cats and dogs. Teleomorphs includes Arthroderma (Nannizzia). (Alexopoulos et al., Introductory Mycology, 4th edition, p305)Nail Diseases: Diseases of the nail plate and tissues surrounding it. The concept is limited to primates.Mitosporic Fungi: A large and heterogenous group of fungi whose common characteristic is the absence of a sexual state. Many of the pathogenic fungi in humans belong to this group.Naphthalenes: Two-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical synthesis, as insect repellents, fungicides, lubricants, preservatives, and, formerly, as topical antiseptics.Paronychia: An inflammatory reaction involving the folds of the skin surrounding the fingernail. It is characterized by acute or chronic purulent, tender, and painful swellings of the tissues around the nail, caused by an abscess of the nail fold. The pathogenic yeast causing paronychia is most frequently Candida albicans. Saprophytic fungi may also be involved. The causative bacteria are usually Staphylococcus, Pseudomonas aeruginosa, or Streptococcus. (Andrews' Diseases of the Skin, 8th ed, p271)Dermatomycoses: Superficial infections of the skin or its appendages by any of various fungi.Itraconazole: A triazole antifungal agent that inhibits cytochrome P-450-dependent enzymes required for ERGOSTEROL synthesis.Antifungal Agents: Substances that destroy fungi by suppressing their ability to grow or reproduce. They differ from FUNGICIDES, INDUSTRIAL because they defend against fungi present in human or animal tissues.Tinea: Fungal infection of keratinized tissues such as hair, skin and nails. The main causative fungi include MICROSPORUM; TRICHOPHYTON; and EPIDERMOPHYTON.Griseofulvin: An antifungal agent used in the treatment of TINEA infections.Potassium Compounds: Inorganic compounds that contain potassium as an integral part of the molecule.Scopulariopsis: A mitosporic fungal genus commonly found in soil. It includes both saprophytes and animal pathogens. Scopulariopsis brevicaulis and related species may convert ARSENIC to volatile and toxic arsine. ONYCHOMYCOSIS and rarely BRAIN ABSCESS; MYCETOMA, and disseminated infections mainly in the IMMUNOCOMPROMISED HOSTS are associated with Scopulariopsis.Lasers, Solid-State: Lasers which use a solid, as opposed to a liquid or gas, as the lasing medium. Common materials used are crystals, such as YAG (YTTRIUM aluminum garnet); alexandrite; and CORUNDUM, doped with a rare earth element such as a NEODYMIUM; ERBIUM; or HOLMIUM. The output is sometimes additionally modified by addition of non-linear optical materials such as potassium titanyl phosphate crystal, which for example is used with neodymium YAG lasers to convert the output light to the visible range.SikkimHoof and Claw: Highly keratinized processes that are sharp and curved, or flat with pointed margins. They are found especially at the end of the limbs in certain animals.Pyridones: Pyridine derivatives with one or more keto groups on the ring.Economics, Pharmaceutical: Economic aspects of the fields of pharmacy and pharmacology as they apply to the development and study of medical economics in rational drug therapy and the impact of pharmaceuticals on the cost of medical care. Pharmaceutical economics also includes the economic considerations of the pharmaceutical care delivery system and in drug prescribing, particularly of cost-benefit values. (From J Res Pharm Econ 1989;1(1); PharmacoEcon 1992;1(1))Trichosporon: A mitosporic fungal genus causing opportunistic infections, endocarditis, fungemia, a hypersensitivity pneumonitis (see TRICHOSPORONOSIS) and white PIEDRA.Hydroxides: Inorganic compounds that contain the OH- group.Emericella: A genus in the family Trichocomaceae, order EUROTIALES. The anamorph is ASPERGILLUS.