67 Questions
What is the cause of seabather's eruption?
Larval forms of jellyfish
What are some diseases that can cause ulcers and verrucous plaques?
Mycobacterial infections, leishmaniasis, and rickettsialpox
What is the cause of swimmer's itch?
Parasitic infection
What is the characteristic appearance of blastomycosis lesions?
Verrucous and granulomatous with thick crusts and central white scars
What is the most common cause of chromoblastomycosis?
Fonsecaea pedrosoi
What skin condition is characterized by fishlike scaling on cutaneous surfaces?
Ichthyosis
What skin condition is caused by hookworms and is restricted to the squamous epithelium in skin due to the absence of collagenase?
Cutaneous larva migrans
What is the difference between petechiae and ecchymoses?
Petechiae occur as small spots while ecchymoses occur in larger areas and in deeper structures
What is the characteristic feature of angiomatous lesions caused by Bacillary angiomatosis?
Red, angiomatous papules or nodules
What is the treatment for limited scabies?
Topical 5% permethrin applied daily for 7 days
What skin condition is characterized by erythematous, blanchable macules, patches, papules or plaques on a hyperemic background that occur in measles, human monocytotropic ehrlichioses, human granulocytotropic anaplasmosis, trench fever, chikungunya, and Zika virus?
Morbilliform exanthems
What is the typical appearance of a skin lesion caused by tuberculosis?
A red-brown papule that eventually becomes an ulcer covered by a dark crust
Which type of mycosis is caused by direct inoculation of a fungus into the skin?
Subcutaneous Mycoses
Which disease is endemic in Southeast Asia and sometimes causes umbilicated papules or oral lesions?
Penicilliosis
Which skin condition is primarily caused by pathogenic immunoglobulins against intra-epidermal desmoglein-1?
Pemphigus foliaceous
Which type of lice infestation affects the body?
Corporis
What is the characteristic symptom of Lyme disease?
Bull's eye lesion
What is the cause of scabies?
Parasitic infection
Which form of cutaneous TB is common among young children?
Scrofuloderma
What is the clinical presentation of mycetoma?
Asymptomatic, subcutaneous swelling with sinus tracts that discharge “granules” or “grains”
What is the most common dermatosis encountered by clinicians?
Herpetic ulcers
What is the common presentation of paracoccidioidomycosis?
Mucocutaneous disease of the gingiva with small papules and ulcerations
What skin condition is caused by hookworms and is restricted to the squamous epithelium in skin?
Cutaneous larva migrans
What is the cause of prurigo nodularis?
Unknown
What is the characteristic of purpura?
It remains visible after blood leakage into the skin
What skin condition causes hypopigmented patches or plaques that progress to infiltrated plaques and tumors?
Mycosis fungoides
What is the differential diagnosis of angiomatous lesions?
All of the above
What is the clinical manifestation of cat scratch disease?
Non-tender, erythematous papule at the site of inoculation
Which skin condition is characterized by flaccid blisters that are readily expanded when side pressure is exerted?
Pemphigus foliaceous
What is the characteristic appearance of molluscum contagiosum lesions?
Umbilicated and dome-shaped papules
What are some common causes of purpura?
Coagulopathies, trauma, nutritional deficiencies, vasculitides, medicines, and infections
What skin condition is characterized by hypopigmented patches or plaques that progress to infiltrated plaques and tumors?
Mycosis fungoides
Which virus is associated with severe scabies?
Human T-lymphotropic virus I
Which disease can cause erythematous papules with urticarial-type erythema?
Papular eruption of HIV
What are some non-TB mycobacteria that can cause skin lesions?
M. fortuitum, M. chelonae/abscessus, and M. marinum
What skin condition causes fishlike scaling on cutaneous surfaces and may be seen in a variety of conditions, including ichthyosis vulgaris?
Ichthyosis
What is the difference between severe scabies and Norwegian scabies?
Severe scabies presents with diffuse involvement while Norwegian scabies does not
What is the primary skin lesion in mite-borne scrub typhus?
A papule
What skin condition is associated with swelling and pain in an extremity, often the legs, and an acral nodule that progresses to a blister on the affected limb?
Dracunculiasis
What skin condition is associated with swelling and pain in an extremity, often the legs, and an acral nodule that progresses to a blister on the affected limb?
Dracunculiasis
Which disease is associated with cervical and anal cancer?
Warts caused by human papillomavirus (HPV)
Which disease can cause destruction of the face if left untreated?
Leishmaniasis
What is the primary cause of zoster infection?
Reactivation of varicella virus
What is the presentation of Norwegian or crusted scabies?
Diffuse involvement with wartlike lesions
What is the characteristic appearance of epidermodysplasia verruciformis lesions?
Numerous flat-topped papules and coalescing cutaneous horns
Which skin condition is strikingly photosensitive?
Pemphigus foliaceous
What is a useful clue in identifying bacterial meningitis due to Neisseria meningitides?
The presence of petechiae on areas of skin pressure such as at the waist or shoulders
What is rhinosporidiosis?
A parasitic infection of the skin
What is the treatment for limited scabies?
Topical permethrin
What is the diagnostic workup for a patient presenting with idiopathic pruritus?
Hepatitis serologies, serum protein electrophoresis, stool guaiac
What skin condition is caused by a fungal infection that causes grayish-white plaques in the mouth, perianal region, inguinal folds, and infra-mammary areas?
Candidiasis
What skin condition causes erythema chronicum migrans, a bull's eye lesion of a gradually expanding, non-scaly redness around the initial tick bite, accompanied by headache, stiff neck, myalgias, and arthralgias?
Lyme disease
What is the difference between corporis, capitis, and pubis in pediculosis?
The type of lice responsible for each form of human involvement
What is the differential diagnosis for patients with severe pruritus and minimal primary skin manifestations?
Diseases with significant morbidity
What is the characteristic appearance of tungiasis lesions?
Callus-like papule, often with hyperpigmentation
What skin condition is a fungal infection that causes grayish-white plaques in the mouth, perianal region, inguinal folds, and infra-mammary areas?
Eczematoid lesions
What skin condition is associated with diffuse erythema or whole-body erythema?
Erythroderma
What is leishmania recidivans?
A chronic form of cutaneous disease caused by leishmaniasis
What is the characteristic rash in dengue fever?
A rash that does not resemble dependent vasculitis and has central islands of sparing
What is the most common strain of herpes simplex virus found in genital lesions?
HSV-2
What is the primary symptom of Ebola caused by the Ebola virus?
A diffuse erythroderma that starts 4 to 5 days after fever with flulike symptoms
What is the differential diagnosis for patients with severe pruritus and minimal primary skin manifestations?
Dermatologic, systemic, neurologic, and psychogenic etiologies
Which disease can cause cutaneous diphtheria?
Diphtheria
Which skin condition can be lethal if treated with oral steroids in patients with disseminated disease?
Herpes zoster
What laboratory tests should be done for a patient presenting with idiopathic pruritus?
Complete blood count with differential, thyroid-stimulating hormone, liver function tests, renal panel, hepatitis serologies, HIV antibody, urinalysis, stool guaiac, chest x-ray, stool for ova and parasites, and possibly serum protein electrophoresis.
What skin condition causes a painless, round, indurated chancre in primary syphilis?
Syphilis
What skin condition is diffuse erythema or whole-body erythema caused by toxic epidermal necrolysis, exanthematous generalized pustular dermatosis, pustular psoriasis, pityriasis rubra pilaris, atopic dermatitis, viral exanthems, cutaneous T-cell lymphoma, Staphylococcus skin scalded syndrome, toxic shock syndrome, seborrheic dermatitis, systemic malignancies, GVHD, and HIV?
Erythroderma
Study Notes
Test your knowledge on Vesicles and Bullae with this quiz! Learn about these fluid-filled lesions on the skin and their association with herpetic involvement. Challenge yourself with questions about their appearance, healing process, and common dermatoses encountered by clinicians. Perfect for healthcare professionals or anyone interested in dermatology.
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