Iran Specialty Board Dermatology common mistakes
Iran Specialty Board Dermatology · Understand the traps and how to avoid them.
When asked about the most likely diagnosis in a child with vesiculobullous lesions, candidates jump to autoimmune bullous diseases (e.g., linear IgA) without first considering infection (impetigo, HSV) or genodermatoses (epidermolysis bullosa), leading to wrong answers and unnecessary steroid use.
Adult-focused training and the emphasis on immunobullous disease in board review create a bias toward rare autoimmune conditions; candidates underweight the frequency of infectious and inherited disorders in pediatric dermatology.
What to do instead
For pediatric blistering, systematically run through a mnemonic (e.g., 'VEAL CHOP' for infections, genodermatoses, autoimmune, and mechanical) and prioritize common conditions. Review pediatric dermatology guidelines that highlight age-specific prevalence and vaccination status.
In dermatopathology, candidates diagnose invasive melanoma solely on the presence of atypical melanocytes at the dermoepidermal junction without assessing for dermal invasion, mitoses, or maturation, missing criteria for invasion and misclassifying as in situ.
Overreliance on architectural features at low power and unfamiliarity with immunohistochemical stains (e.g., MITF, SOX10) and the importance of dermal mitotic figures in prognostication.
What to do instead
Practice a structured approach to melanocytic lesions: evaluate symmetry, borders, maturation, cytology, and dermal mitoses. Use a checklist and review cases with available stains to correlate. Study the AJCC staging criteria for melanoma.
When managing a patient with suspected contact dermatitis, candidates recommend patch testing without considering the appropriate timing (e.g., testing during acute flare) or the need to use standard series and avoid false negatives from steroid use.
Desire to identify the allergen quickly leads to premature testing; lack of awareness of patch test indications and contraindications, including the effect of immunosuppressants.
What to do instead
Learn the indications for patch testing (chronic, unexplained dermatitis; occupational; suspected allergic contact), and the rules: test when dermatitis is quiescent, avoid systemic steroids for 2–4 weeks, and use standard series with additional allergens based on history. Review the North American Contact Dermatitis Group guidelines.
In hair and nail disorders, candidates misdiagnose alopecia areata as telogen effluvium or androgenetic alopecia without performing a hair pull test, dermoscopy, or scalp biopsy when indicated, leading to incorrect treatment.
Reliance on pattern alone and unfamiliarity with bedside tools (dermoscopy, hair pull) and the significance of exclamation mark hairs and yellow dots.
What to do instead
Adopt a systematic approach to alopecia: determine scarring vs non-scarring, perform hair pull test and dermoscopy, and use biopsy for ambiguous cases. Review the differential of patchy hair loss and the dermoscopic features of each disorder.
When treating severe psoriasis with biologics, candidates fail to screen for latent tuberculosis or hepatitis B before starting therapy, risking reactivation.
Focus on efficacy and rapid improvement; underestimation of infection risk and lack of familiarity with screening guidelines.
What to do instead
Memorize the pretreatment screening for biologics: TB (IGRA or tuberculin skin test), hepatitis B and C, HIV, and baseline labs. Review the AAD-NPF guidelines for psoriasis with comorbidities and the CDC recommendations for TB screening.
In evaluating a pigmented lesion, candidates rely only on the ABCDE criteria and ignore the 'ugly duckling' sign and the need for dermoscopy, leading to missed acral lentiginous melanoma or nodular melanoma.
Overemphasis on classic ABCDE in board review; lack of training in dermoscopy and the specific features of acral and nodular subtypes.
What to do instead
Study the revised 7-point dermoscopy checklist and the ugly duckling concept. Practice dermoscopy on acral lesions (parallel ridge pattern) and nodular lesions (blue-black color, no radial growth phase). Review the AAD melanoma guidelines.
When prescribing isotretinoin for acne, candidates forget to counsel on contraception, pregnancy testing, and the iPLEDGE program requirements, and fail to monitor lipids and liver enzymes.
Familiarity with the drug's efficacy but not its strict risk management protocols; time pressure in clinical encounters.
What to do instead
Create a checklist for isotretinoin initiation: two negative pregnancy tests, monthly pregnancy tests, contraception counseling, and baseline/follow-up labs (lipids, LFTs). Review the iPLEDGE program and the AAD guidelines for acne.
In autoimmune connective tissue diseases, candidates interpret a positive ANA as diagnostic of lupus without considering titer, pattern, and clinical context, leading to overdiagnosis of SLE in patients with nonspecific symptoms.
ANA is sensitive but not specific; lack of understanding of pretest probability and the significance of ANA titers and patterns (e.g., homogeneous vs speckled).
What to do instead
Learn the ACR/EULAR classification criteria for SLE, which require clinical and immunologic domains. Use ANA only as a screening tool when clinical suspicion is high; confirm with specific antibodies (anti-dsDNA, anti-Sm). Review the concept of connective tissue disease overlap.
When performing a skin biopsy, candidates choose the wrong type (shave vs punch vs excisional) or fail to include adequate deep dermis/subcutis for suspected panniculitis or deep fungal infection, resulting in nondiagnostic specimens.
Desire for minimal scarring and unfamiliarity with the histopathologic requirements for different disorders.
What to do instead
Study biopsy techniques: punch for inflammatory dermatoses (4–6 mm), excisional for suspected melanoma, deep incisional for panniculitis. Always mark orientation and provide clinical history. Review the AAD biopsy guidelines.
In ethical scenarios, candidates prioritize patient autonomy absolutely and ignore public health reporting requirements or duty to warn, leading to incorrect answers on mandated reporting of communicable diseases (e.g., syphilis, gonorrhea) or suspected child abuse.
Strong emphasis on confidentiality in medical ethics training; lack of familiarity with specific legal statutes and exceptions.
What to do instead
Review the CDC list of nationally notifiable conditions and state laws on mandatory reporting. Understand the balance between confidentiality and public welfare, and the criteria for duty to warn (Tarasoff). Practice ethical scenarios with a framework: identify stakeholders, legal obligations, and institutional policies.