Dandruff and Scalp Psoriasis Plaques: Or something else? Differential Diagnosis

Congenital malformations, deformities, and chromosomal abnormalities (Q00-Q99).

  • Ichthyosis, unspecified – genetic disorders with X-linked recessive inheritance resulting in cornification disorders; thickening of the uppermost skin layer, stratum corneum, and visible skin scales; in some forms, the skin is severely reddened

Skin and subcutaneous (L00-L99).

  • Age wart (synonyms: seborrheic keratosis; verruca seborrhoica; seborrheic wart).
  • Dermatitis plantaris sicca – form of skin reaction that occurs in children and adolescents and affects the feet; common when wearing sneakers.
  • Dermatitis seborrhoica (seborrheic dermatitis) – greasy-scaly skin inflammation.
  • Eczema (all forms)
  • Eruptive psoriasis (psoriasis guttata) – small scaly papules, often after streptococcal infection.
  • Keratoderma blenorrhagica – symptom from Reiter’s syndrome, which occurs mainly after urological or intestinal infections.
  • Keratosis senilis (senile skin)
  • Lichen ruber planus (nodular lichen)
  • Lichen simplex (synonyms: Neurodermatitis cirumscripta, lichen chronicus vidal or Vidal disease) – localized, chronic inflammatory, plaque and lichinoid (nodular) skin disease that occurs in episodes and is accompanied by severe pruritus (itching).
  • Pityriasis lichenoides chronica – chronic symmetrical exanthema (rash) on the trunk and extremities.
  • Pityriasis versicolor (Kleienpilzflechte, Kleieflechte) – superficial dermatophytosis (skin fungal disease) with the pathogen Malassezia furfur (yeast); sun exposure causes a whitish discoloration of the affected areas (white macules).
  • Pityriasis rosea (scale florets)
  • Psoriasis (psoriasis)
  • Sweet syndrome (synonym: acute febrile neutrophilic dermatosis) – clinical picture associated with fever and formation of multiple red nodules and plaques, especially on the face and extremities, there is also an increase in neutrophilic granulocytes (belong to the group of white blood cells); possible triggers are infectious diseases, drugs and neoplasms (neoplasms); possible hematological diseases (blood diseases): Myeloid leukemias, myelodysplastic and myeloproliferative diseases, chronic leukemias, paraproteinemias.

Infectious and parasitic diseases (A00-B99).

  • Mycoses (fungal infections) of the skin, unspecified (scalp, trunk, feet).
  • Syphilis

Neoplasms – tumor diseases (C00-D48)

  • Bowen’s disease – precancerous (precancerous) lesions of the skin.
  • Mycosis fungoides (cutaneous T-cell lymphoma) – a cutaneous (located in the skin) T-cell lymphoma that is a malignant (malignant) degeneration of cells that belong to the immune system
  • Solitary mastocytoma – belongs to the heterogeneous group of mastocytoses characterized by an accumulation of mast cells in various organs; exists from birth or develops in the first two years of life; disease is usually benign (benign) in children

Medication*

* Type IV allergy (Allergic late-type reaction)/Lichen ruber-like or psoriasiform drug exanthema.