DNCB-DNC : DNCB Dermatology Nurse Certified Exam

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Question: 1
A 28-year-old woman presents with a pruritic, erythematous rash with vesicles and weeping on her hands. She works as a hairdresser and frequently comes into contact with chemicals and water. What is the most likely diagnosis?
1. Irritant contact dermatitis
topic dermatitis yshidrotic eczema
wer: D
anation: The presentation of a pruritic, erythematous rash with vesicle ping on the hands, particularly in a patient with occupational exposure micals and water (such as a hairdresser), is consistent with dyshidrotic ma. Dyshidrotic eczema is a type of eczema characterized by small, d
d vesicles on the palms, soles, and lateral aspects of the fingers and to nt contact dermatitis is an inflammatory reaction to an irritant, while gic contact dermatitis is an immune-mediated reaction to an allergen. ic dermatitis typically presents with intense pruritus, erythematous an riated patches, and a history of allergic conditions.
stion: 2
-year-old man presents with a pruritic, erythematous rash on his back,
Allergic contact dermatitis
2. A
3. D
Ans
Expl s and
wee to
che
ecze eep-
seate es.
Irrita aller
Atop d
exco
Que
A 40
abdomen, and extremities. The rash consists of discrete, coin-shaped plaques with a silvery scale. On examination, Auspitz sign (pinpoint bleeding after scale removal) is observed. What is the most likely diagnosis?
1. Psoriasis
2. Pityriasis rosea
3. Tinea corporis
4. Nummular eczema Answer: A
ally presents with a herald patch (large, salmon-colored patch) follow ler, oval-shaped, scaly lesions in a Christmas tree pattern. Tinea corpo ngworm, presents with annular, erythematous patches with central cle
raised, scaly border. Nummular eczema presents with coin-shaped ues that are often pruritic and can be associated with a history of atop
stion: 3
-year-old man presents with a pruritic, raised, erythematous rash on h and fingers. The rash is vesicular and is accompanied by burning an
erness. What is the most likely diagnosis?
topic dermatitis
erpes simplex virus infection cabies infestation
ontact dermatitis
wer: B
Explanation: The presentation of pruritic, erythematous coin-shaped plaques with a silvery scale, along with Auspitz sign, is highly suggestive of psoriasis. Psoriasis is a chronic autoimmune condition characterized by rapid skin cell turnover, resulting in the formation of thick, scaly plaques. Pityriasis rosea typic ed by
smal ris,
or ri aring
and a
plaq y.
Que
A 35 is
hands d
tend
1. A
2. H
3. S
4. C
Ans
Explanation: The presentation of a pruritic, raised, erythematous rash on the hands and fingers, accompanied by vesicles, burning, and tenderness, is suggestive of herpes simplex virus (HSV) infection. HSV infection commonly presents as grouped vesicles on an erythematous base. Atopic dermatitis typically presents with intense pruritus, erythematous and excoriated patches. Scabies infestation is characterized by intense itching, especially at night, and
the presence of burrows and papules. Contact dermatitis is an inflammatory reaction to an allergen or irritant, resulting in localized rash.
Question: 4
nosis?
asal cell carcinoma quamous cell carcinoma elanoma
aposi sarcoma wer: A
anation: The clinical presentation of a slowly enlarging, painless, red le with telangiectasias, particularly on sun-exposed areas such as the n ghly suggestive of basal cell carcinoma. Basal cell carcinoma is the m mon type of skin cancer and typically presents as a non-healing, pearl lucent nodule with telangiectasias. Squamous cell carcinoma often
ents as a firm, pink, scaly plaque or nodule. Melanoma commonly pre asymmetrical pigmented lesion with irregular borders. Kaposi sarco acterized by red, violaceous nodules or plaques, often involving the sk
ucosa, and internal organs.
A 50-year-old woman presents with a slowly enlarging, painless, red nodule on her nose. She reports occasional bleeding from the lesion. On examination, telangiectasias are noted on the surface of the nodule. What is the most likely diag
1. B
2. S
3. M
4. K
Ans Expl
nodu ose,
is hi ost
com y or
trans
pres sents
as an ma is
char in,
oral m
Question: 5
A 45-year-old woman presents with a pruritic, erythematous rash with silvery scales on her elbows, knees, and scalp. The rash is symmetrically distributed and has been present for several months. What is the most likely diagnosis?
1. Psoriasis
2. Atopic dermatitis
3. Contact dermatitis
4. Seborrheic dermatitis Answer: A
ematous rash with silvery scales on the elbows, knees, and scalp is istent with psoriasis. Psoriasis is a chronic autoimmune condition acterized by rapid skin cell turnover, resulting in the formation of thic
plaques. Atopic dermatitis typically presents with intense pruritus, ematous and excoriated patches, and a history of allergic conditions. act dermatitis is an inflammatory reaction to an allergen or irritant, ting in localized rash. Seborrheic dermatitis is characterized by greasy ematous patches with yellowish scales, commonly affecting the scalp and chest.
stion: 6
-year-old woman presents with a pruritic, erythematous rash on her fa cularly involving the cheeks and nose. The rash worsens with sun sure. On examination, telangiectasias and papules are noted on the aff
What is the most likely diagnosis?
ystemic lupus erythematosus (SLE)
Explanation: The presentation of symmetrically distributed, pruritic, eryth
cons
char k,
scaly eryth Cont
resul ,
eryth ,
face,
Que
A 30 ce,
parti
expo ected
areas.
1. S
2. Rosacea
3. Acne vulgaris
4. Contact dermatitis Answer: B
Explanation: The presentation of a pruritic, erythematous rash on the face,
allergen or irritant, resulting in localized rash.
stion: 7
-year-old man presents with a solitary indurated penile ulcer with vely clean margins, no obvious raised granulomatous areas, and no oloration. It began as a hard, nonpainful nodule. Regional hadenopathy is present. What is the most likely etiologic agent?
aemophilus ducreyi
uman papillomavirus, serotype 11 reptococcus pyogenes
reponema pallidum wer: D
anation: The presentation of a solitary indurated penile ulcer with clea ins, no raised granulomatous areas, and regional lymphadenopathy is
particularly involving the cheeks and nose, worsened by sun exposure and accompanied by telangiectasias and papules, is consistent with rosacea. Rosacea is a chronic inflammatory condition that primarily affects the face and is characterized by flushing, persistent erythema, telangiectasias, and inflammatory papules and pustules. Systemic lupus erythematosus (SLE) can present with a malar rash, but it is typically more diffuse and associated with other systemic symptoms. Acne vulgaris commonly presents with comedones, papules, pustules, and nodules. Contact dermatitis is an inflammatory reaction to an
Que
A 22
relati disc lymp
1. H
2. H
3. St
4. T
Ans
Expl n
marg
highly suggestive of syphilis. The most common etiologic agent responsible for syphilis is Treponema pallidum. Haemophilus ducreyi is the causative agent of chancroid, which presents with painful genital ulcers and tender inguinal lymphadenopathy. Human papillomavirus (HPV) infection typically leads to genital warts, while Streptococcus pyogenes is associated with streptococcal infections, such as cellulitis and impetigo.
Question: 8
tasis dermatitis yoderma gangrenosum iabetic foot ulcer enous stasis ulcer
wer: D
anation: The presentation of a red, scaly rash on the lower legs associ hallow, punched-out ulcers with necrotic bases in a patient with a hi abetes mellitus is highly suggestive of venous stasis ulcers. Venous st ulcers are commonly seen in patients with chronic venous insufficiency an due to impaired venous return, resulting in edema, inflammation, an
mately, ulceration. Stasis dermatitis is characterized by erythematous, tic, and scaly patches or plaques. Pyoderma gangrenosum is a rare, mmatory condition characterized by rapidly progressing, painful ulcer
ndermined violaceous borders. Diabetic foot ulcers typically occur i nts with diabetes and are often associated with peripheral neuropathy heral vascular disease.
A 55-year-old man presents with a red, scaly rash on his lower legs. The rash is associated with mild pain and swelling. On examination, there are shallow, punched-out ulcers with necrotic bases. The patient has a history of diabetes mellitus. What is the most likely diagnosis?
S
P
D
V
Ans
Expl ated
with s story
of di asis
d
occur d
ulti pruri
infla s
with u n
patie and
perip

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