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Diagnose these 3 skin conditions

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cutis verticis gyrata ridged folded scalp forehead skin

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impetigo contagiosa honey crust facial skin infection child

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contact dermatitis allergic arm wrist erythematous patch bracelet

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cutis verticis gyrata cerebriform forehead skin folds diagnosis etiology

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impetigo contagiosa honey crust Staphylococcus Streptococcus treatment

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Here are the diagnoses for all three conditions:

Image 1 (Top Left) — Cutis Verticis Gyrata (CVG)

Diagnosis: Cutis Verticis Gyrata, with possible underlying Pachydermoperiostosis (Primary Hypertrophic Osteoarthropathy)
The man's face and forehead show dramatic, cerebriform (brain-like) ridges and deep furrows of redundant, thickened skin — the hallmark of CVG.
Key features visible:
  • Deep convoluted skin folds and furrows over the forehead/scalp
  • Coarsened, thickened facial skin
  • Heavy, prominent features
Pathophysiology: CVG results from abnormal hypertrophy and folding of the skin, most commonly on the scalp and forehead. It can be:
  • Primary essential (no identifiable cause, often in males)
  • Primary non-essential (associated with neuropsychiatric disorders, intellectual disability)
  • Secondary — to conditions like Pachydermoperiostosis, acromegaly, inflammatory disorders, or neoplasia
Harrison's (p. 10478) specifically describes CVG in the context of Pachydermoperiostosis, where the skin becomes thickened, coarse, with deep nasolabial folds and a furrowed forehead.

Image 1 (Top Right) — Palmar Hyperlinearity / Thickened Palmar Creases

Diagnosis: Exaggerated Palmar Creases, consistent with Palmoplantar Keratoderma or a systemic condition causing palmar skin thickening
The hands show markedly accentuated, dark, deep palmar creases with thickened, yellowed skin.
Key differentials:
  • Palmoplantar keratoderma (PPK) — hereditary or acquired thickening of palmar/plantar skin
  • Acromegaly — causes coarse, thickened, doughy hands
  • Pachydermoperiostosis — also affects distal extremities
  • Tripe palms — a paraneoplastic phenomenon with pronounced palmar ridging resembling gastric mucosa, associated with gastric/lung cancer

Image 2 — Impetigo Contagiosa (Non-Bullous)

Diagnosis: Impetigo Contagiosa, consistent with non-bullous impetigo caused by Staphylococcus aureus and/or Streptococcus pyogenes
The cheek/neck lesion shows a classic large, erythematous, weeping erosion with hemorrhagic honey-colored/golden-brown crusting.
Key features:
  • Honey/golden-brown thick crusts over an erythematous base
  • Facial/perioral location (classic site)
  • Moist, exudative surface
Clinical relevance (Harrison's, p. 3896):
  • Impetigo contagiosa is caused by S. pyogenes; bullous impetigo by S. aureus
  • MRSA epidemics of impetigo have been reported
  • Important complication: Risk of post-streptococcal glomerulonephritis (though NOT rheumatic fever from skin infection)
Treatment: Topical mupirocin for localized disease; oral beta-lactams (or TMP-SMX if MRSA suspected) for extensive disease.

Image 3 — Allergic Contact Dermatitis (ACD)

Diagnosis: Allergic Contact Dermatitis, likely from the wooden/resin bracelet visible in the image
The arm shows erythematous, slightly raised, irregular plaques and patches in a distribution corresponding directly to contact with the bracelet.
Key features:
  • Erythematous, well-demarcated patches with subtle vesiculation
  • Distribution matching the contact area of the bracelet
  • Pattern consistent with Type IV (delayed-type) hypersensitivity reaction
Common culprits in jewelry ACD:
  • Nickel (most common metal allergen) — though this appears to be a wooden/resin bracelet
  • Colophony (rosin) in wood finishes/lacquers
  • Formaldehyde resins, varnishes, or dyes in wooden/composite jewelry
Management:
  1. Remove the offending item
  2. Topical mid-to-high potency corticosteroids
  3. Patch testing to identify the specific allergen
  4. Avoidance counseling
Disclaimer: These are educational clinical assessments based on visual findings. A qualified dermatologist should evaluate any actual skin condition for formal diagnosis and treatment.
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