Dermatology Tinea Pedis Overview

Questions and Answers

Which type of tinea pedis is characterized by vesicular eruptions that may fuse into bullae?

Acute vesicular tinea pedis (correct)

Tinea cruris

Tinea corporis

Chronic scaly tinea pedis

What is the common pathogen identified in chronic scaly infection of the plantar surface (hyperkeratotic tinea pedis)?

Microsporum canis

Trichophyton rubrum (correct)

Candida albicans

Epidermophyton floccosum

What is the treatment regimen for tinea cruris?

Terbinafine 1% cream for 1 week (correct)

Bacitracin ointment for 5 days

Clotrimazole 1% cream for 2 weeks

Fluconazole 100 mg daily for 1 week

Which symptom is commonly associated with tinea cruris?

Half-moon shaped red-brown plaque Signup and view all the answers

What condition do the itchy sterile vesicles in acute vesicular tinea pedis represent?

Allergic response to the fungus Signup and view all the answers

Which of the following is NOT a treatment option for tinea corporis?

Topical corticosteroids Signup and view all the answers

What distinguishes chronic scaly tinea pedis from other types of tinea infections?

Fine silvery white scales on the sole Signup and view all the answers

Which of the following treatments is considered fungicidal for tinea pedis?

Terbinafine 1% cream Signup and view all the answers

What is the likely appearance of tinea of the palmar surface?

Dry diffuse hyperkeratosis Signup and view all the answers

Which of the following types of tinea capitis is characterized by hair loss with broken hairs appearing as black dots?

Non-inflammatory black dot pattern Signup and view all the answers

Which treatment option is indicated for tinea capitis?

Systemic treatment Signup and view all the answers

What condition is likely to develop due to untreated kerion in tinea capitis?

Scarring alopecia Signup and view all the answers

What is tinea incognito primarily caused by?

Use of topical steroids on fungal infections Signup and view all the answers

Which medication is well-absorbed when taken after a fatty meal for treating fungal infections?

Griseofulvin Signup and view all the answers

In tinea barbae, how are the infected hairs described?

Easily removed Signup and view all the answers

Which of the following is NOT a typical characteristic of tinea unguium (onychomycosis)?

Presence of red inflamed skin Signup and view all the answers

What symptom is associated with seborrheic dermatitis like tinea capitis?

Fine white adherent scales Signup and view all the answers

What symptoms characterize monilial vulvovaginitis?

Vaginal itching and creamy discharge Signup and view all the answers

Which of the following factors does NOT increase the risk of candidiasis?

Environmental exposure to mold Signup and view all the answers

Which statement is true regarding favus in tinea capitis?

It produces yellow cup-shaped crusts known as scutula. Signup and view all the answers

What is the initial treatment for oral candidiasis (thrush) in adults?

Fluconazole 150 mg oral dose Signup and view all the answers

Which condition is often associated with bacterial folliculitis?

Hair removal techniques Signup and view all the answers

What is a distinguishing feature of a kerion in tinea capitis?

Presence of thickened, crusty lesions Signup and view all the answers

Which demographic is least likely to be affected by oral thrush?

Healthy young adults with no risk factors Signup and view all the answers

What is the primary environment that predisposes individuals to Candida balanitis?

Moist and warm conditions Signup and view all the answers

Which of the following is NOT a recommended treatment for Candida intertrigo?

Oral fluconazole treatment Signup and view all the answers

Which symptoms are characteristic of diaper candidiasis?

Red base with satellite pustules Signup and view all the answers

What are the clinical signs of finger and toe web candidiasis?

White, tender macerated skin with a moist base Signup and view all the answers

What is the term used for lesions found outside apposing skin surfaces in candidiasis of skin folds?

Satellite lesions Signup and view all the answers

Which antifungal treatment is suggested for diaper candidiasis?

Miconazole antifungal cream Signup and view all the answers

Which of the following best describes the treatment goals for Candida intertrigo?

Maintain dryness of the affected area Signup and view all the answers

In which condition does Candida typically thrive in an environment created by skin touching skin?

Candidiasis of the skin folds Signup and view all the answers

What is the recommended method to keep hands dry in chronic paronychia management?

Wearing gloves Signup and view all the answers

Which microorganism is primarily responsible for causing pityriasis versicolor?

Pityrosporum orbiculare Signup and view all the answers

What is the characteristic appearance of lesions in pityriasis versicolor according to potassium hydroxide examination?

Spaghetti-and-meatballs pattern Signup and view all the answers

Which treatment option is NOT indicated for pityriasis versicolor?

Acyclovir 200mg twice daily Signup and view all the answers

What type of fungi causes both blastomycosis and histoplasmosis?

Dimorphic fungi Signup and view all the answers

During a Wood’s light examination, what fluorescence is associated with pityriasis versicolor?

Pale yellow-to-white fluorescence Signup and view all the answers

What is a common characteristic of lesions caused by pityriasis versicolor?

They begin as small circular macules Signup and view all the answers

Which factor is considered when prescribing broad-spectrum antibiotics for chronic paronychia?

To cover gram-negative bacteria Signup and view all the answers

Study Notes

Tinea Infections Overview

Chronic scaly infection on plantar surface is hyperkeratotic or moccasin-type tinea pedis, often covering the entire sole with fine silvery-white scales.
Common symptoms include pink, tender, and itchy skin, affecting feet and sometimes hands; Trichophyton rubrum is the primary pathogen.
Acute vesicular tinea pedis involves highly inflammatory vesicular eruptions that can fuse into bullae and may arise in distant sites due to an allergic response (dermatophytid reaction).

Treatment for Tinea Pedis

Terbinafine 1% cream applied twice daily for one week; oral treatments include Fluconazole, Itraconazole, and Terbinafine.
Secondary bacterial infections require antibiotics; id reaction may be treated with topical steroids or prednisone.

Tinea Cruris

Tinea cruris, or jock itch, manifests as a half-moon shaped red-brown plaque with scaling, common in men and rare in children.
Frequent itching; treatment mirrors that of tinea pedis, with Terbinafine cream and oral options such as Fluconazole and Itraconazole.

Tinea Corporis

Tinea corporis affects the trunk, limbs, and face, distinctive for its round, annular lesions.
Treatment approach is the same as for tinea cruris.

Tinea Manum

Tinea of the hand resembles tinea corporis on the dorsal side; palmar surface may show a dry, hyperkeratotic form similar to plantar tinea.
Often associated with tinea pedis and finger nail infections.

Tinea Capitis

Common in children aged 3-7; characterized by cervical or occipital lymphadenopathy.
Clinical types include:
- Non-inflammatory black dot pattern with hair loss and broken hairs.
- Inflammatory kerion leading to boggy areas and potential scarring alopecia.
- Seborrheic dermatitis-like lesions with fine, white scales.
- Pustular type featuring discrete pustules without significant hair loss.
- Favus, caused by Trichophyton schoenleinii, features yellowish scutula that can cause scarring alopecia.

Treatment for Tinea Capitis

Systemic treatment required; options include Griseofulvin, Fluconazole, and Terbinafine.

Tinea Barbae

Affects the beard and mustache, beginning with follicular pustules that can merge into erythmatous kerions.
Treatment remains similar to tinea capitis.

Tinea Incognito

Occurs due to inappropriate treatment of fungal infections with topical steroids, which mask symptoms while the infection persists.
Condition may worsen upon cessation of steroids.

Tinea Unguium (Onychomycosis)

Primarily caused by Trichophyton and Microsporum, affecting fingernails and toenails leading to discoloration, thickening, and brittleness.

Candidiasis Overview

Candida albicans can cause superficial infections in skin, mucous membranes, and systemically, especially under conditions like immunosuppression or diabetes.

Types of Candidiasis

Vulvovaginal candidiasis: Vaginal itching and discharge; treated with miconazole or Fluconazole.
Oral candidiasis (thrush): Characterized by white plaques in the mouth; treated with Nystatin or clotrimazole.
Candidiasis of the skin folds: Presents with pustules under moist environments; managed by maintaining dryness and topical antifungal ointments.
Diaper candidiasis: Common in infants with characteristic rash and satellite lesions; treatment involves keeping the area dry and applying antifungal cream.

Pityriasis Versicolor

Caused by Malassezia species, leading to discolored macules on the upper trunk; may be asymptomatic but can itch.
Characteristic "spaghetti-and-meatballs" appearance on potassium hydroxide examination; treated with Ketoconazole or Selenium sulfide.

Additional Skin Infections

Blasmycosis and Histoplasmosis: Dimorphic fungal infections causing systemic illness and skin lesions, commonly found in soil and presenting respiratory symptoms.
Aspergillus & Cryptococcus spp.: Rarely cause localized skin infections.

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Description

This quiz focuses on chronic scaly infections of the plantar surface, specifically the hyperkeratotic or moccasin type of tinea pedis. It covers symptoms, pathogen identification, and possible patterns of infection between feet and hands. Test your knowledge on this dermatological condition.