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A)Protein energy malnutrition B)contact dermatitis pathophysiology C) Immunobullous disorders D)vasculitis classification :clinical features and management of small vessel vasculitis E)cutaneous TB classification :clinical features and management of TB verrucosa cutis in 10 marks format for 3rd yr dermatology post graduate theory examination

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All five model answers are now complete. Here is a summary of what was covered for each topic:

Summary of All 5 Answers

A) Protein Energy Malnutrition

Covers definition, classification (Marasmus vs Kwashiorkor vs Marasmic Kwashiorkor), cutaneous features (flaky paint dermatosis, flag sign, emaciation), systemic features, pathophysiology (protein-sparing failure, gut microbiome), diagnosis (serum albumin, anthropometry), and the WHO 10-step management with refeeding syndrome caution.

B) Contact Dermatitis - Pathophysiology

Full mechanistic detail on:
  • ICD: Direct keratinocyte damage -> IL-1α/TNF-α cytokines -> dose-dependent, no sensitization
  • ACD: Two-phase Type IV hypersensitivity: Sensitization phase (Langerhans cells, hapten-carrier, lymph node priming of memory T cells, 10-15 days) and Elicitation phase (memory T cell re-activation, IFN-γ/IL-17, CD8+ cytotoxic damage, 48-72h peak)
  • Comparison table, common allergens, patch testing, and management

C) Immunobullous Disorders

Complete classification of intraepidermal (pemphigus group with target antigens DSG1/3) and subepidermal (BP, MMP, DH, LABD, EBA with target antigens and levels of split). DIF patterns table, diagnostic workup (histopathology, DIF, IDIF, ELISA), and management of PV (rituximab first-line) and BP (topical clobetasol).

D) Vasculitis Classification + Small Vessel Vasculitis

Chapel Hill 2012 classification (large/medium/small), etiopathogenesis of LCV (immune complex -> complement -> neutrophil degranulation -> fibrinoid necrosis), clinical features of CSVV (palpable purpura, HSP tetrad, urticarial vasculitis, ANCA-associated features), investigations, and stepwise management (colchicine, dapsone, steroids, rituximab for ANCA-associated).

E) Cutaneous TB Classification + TB Verrucosa Cutis

Full classification (exogenous inoculation, endogenous spread, tuberculids) with immune status correlation. TVC covered with pathogenesis (high immunity, paucibacillary), clinical evolution (papule -> verrucous plaque with papillomatous center, mustard paste sign, horny projections, healing with scar), differential diagnosis, investigations (strongly positive Mantoux, histology showing granulomas with pseudoepitheliomatous hyperplasia, PCR), and complete ATT regimen (2HRZE/4HR, drug doses, monitoring parameters).
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