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Chapter 15: Disorders of Abnormal Keratinization
A. Hereditary keratoses

a. Ichthyosis
1. Ichthyosis vulgaris
2. X-linked ichthyosis
3. Bullous congenital ichthyosiform erythroderma (BCIE)
4. Ichthyosis bullosa of Siemens
5. Nonbullous congenital ichthyosiform erythroderma (NBCIE)
6. Lamellar ichthyosis
7. Harlequin ichthyosis
8. Ichthyosis syndrome

b. Palmoplantar keratoderma
1. Thost-Unna palmoplantar keratoderma
2. Vörner palmoplantar keratoderma
3. Mal de Meleda
4. Dominant Meleda palmoplantar keratoderma
5. Keratosis palmoplantaris transgrediens Nagashima
6. Keratosis palmoplantaris linearis/striata
7. Punctate palmoplantar keratoderma
8. Keratosis palmoplantaris mutilans (Vohwinkel)
9. Papillon-Lefévre syndrome
10. Richner-Hanhart syndrome
11. Náxos disease

c. Other hereditary keratoses
1. Darier’s disease
2. Erythrokeratodermia

B. Acquired keratoses

a. Inflammatory keratosis
1. Psoriasis
1) Psoriasis vulgaris
2) Guttate psoriasis
3) Pustular psoriasis
4) Psoriatic erythroderma
5) Psoriatic arthritis
2. Pityriasis rubra pilaris
3. Parapsoriasis en plaque
1) Small-plaque parapsoriasis
2) Large-plaque parapsoriasis
4. Pityriasis lichenoides
5. Lichen planus
6. Lichen striatus
7. Lichen nitidus
8. Pityriasis rosea (Gibert)
9. Acquired ichthyosis

b. Noninflammatory keratoses
1. Clavus
2. Callus
3. Lichen pilaris
4. Erythromelanosis follicularis faciei (Kitamura)
5. Lichen spinulosus
6. Acanthosis nigricans (AN)
7. Confluent and reticulated papillomatosis
8. Bazex syndrome
9. Keratosis follicularis squamosa (Dohi)
10. Pityriasis circinata (Toyama)
11. Hyperkeratosis lenticularis perstans

Contents TOP
Author Profile
Structure and
Function of the Skin
Histopathology of the Skin
Immunology of the Skin
Skin Lesions
Diagnosis of Skin Diseases
Treatment of Skin Diseases
Eczema and Dermatitis
Urticaria, Prurigo and Pruritus
Erythema, Erythroderma
(Exfoliative Dermatitis)
Drug-Induced Skin Reactions
and GVHD
Vasculitis, Purpura and
Other Vascular Diseases
Collagen Diseases
Physiochemical Injury and
Photosensitive Diseases
Blistering and Pustular Diseases
Disorders of Abnormal Keratinization
Disorders of Skin Color
Metabolic Disorders
Disorders of the Dermis and Subcutaneous Fat
Disorders of the Skin Appendages
Nevus and Neurocutaneous Syndrome
Benign Skin Tumors
Malignant Skin Tumors and Melanomas
Viral Infections
Bacterial Infections
Fungal Diseases
Mycobacterial Infections
Sexually Transmitted
Skin Diseases Caused by Arthropods and Other Noxious Animals
Genodermatoses: Genetic Counseling and Prenatal Diagnosis
Dermoscopy: Appendix