Ch 6 Other Papulosquamous Disorders

Question 1

Pitaryaisis Rosea

Answer 1

• HHV 6,7 reactivation
• Herald Patch, mildly scaly salmon colored pruritic plaque
• Fir tree pattern
• No tx
• DDx: Guttate, Tinea, syph
• Can be caused by drugs including gold and barbituates

Question 2

Lichen Planus

Answer 2

• Caused by MHCI and CD8 cells
• Seen with other autoimmune conditions
• Oral can be caused by mercury in algam fillings
• HEP C
• Wickman Striae (Papules that sparkle/glisten)
• White lacy plaques in mouth can lead to SCC
• Scarring alopecia on scalp
• Can be caused by drugs (gold etc)

Question 3

Lichen Planus Type and histology

Answer 3

• Hypertrophic-warty, can stay longer
• Ulcerative can lead to SCC
• Histology: Sawtooth, increased granular layer, hyperkeratosis

Question 4

Pitaryasis Rubris Pilaris

Answer 4

• Familial kind is AD
• Caused by hyperkeratinization
• Scale and follicular plugging with eryhtroderma
• Spares areola and axillae
• Orange Tinge
• Tx: emolients and salicylates

Question 5

Parapsoriasis

Answer 5

• Less scale than psoriasis, assymetric

- Don’t improve with psoriasis tx

Question 6

Benign Parapsoriasis

Answer 6

-Smaller
-Yellow
UVB

Question 7

Premycotic Parapsoriasis

Answer 7

• Brown/Violet
• Assymetric
• Iregularly shaped
• Atrophy and poikiloderma
• Be sure to get a bx and work up for CTCL

Question 8

Pitaryasis Lichenoides Acute

Answer 8

• Simliar to chicken pox but spares face

- Necrotic papules

Question 9

Pitaryasis Lichenoides Chronic

Answer 9

• Scaly macules and papules
• Sinlge silvery miccaceous scale
• Tx is ABX or light

Question 10

Eryhtroderma

Answer 10

• Eryhthroderma when no scaling
• Exfolliative dermatitis when there is scaling
• Psoriasis, Drugs, Norweigan Scabies, Pitaryasis Rubrris pilaris, icthyiform, pemphigus, reiters, eczema, Lymphoma