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Chapter 21: Benign Skin Tumors
A. Epidermal tumors

1. Seborrheic keratosis (SK)
2. Clear cell acanthoma
3.Warty dyskeratoma
4. Porokeratosis

B. Follicular tumors

1. Trichofolliculoma
2. Trichoadenoma
3. Solitary trichoepithelioma
4. Trichoepithelioma papulosum multiplex
5. Desmoplastic trichoepithelioma
6. Trichoblastoma
7. Pilomatricoma
8. Trichilemmoma
9. Proliferating trichilemmal tumor

C. Sebaceous tumors

1. Sebaceous hyperplasia
2. Sebaceous adenoma
3. Sebaceoma

D. Sweat gland tumors

1. Eccrine hidrocystoma
2. Syringoma
3. Eccrine poroma
4. Eccrine spiradenoma
5. Papillary eccrine adenoma
6. Nodular hidradenoma
7. Mixed tumor of the skin
8. Apocrine hidrocystoma
9. Cylindroma
10. Hidradenoma papilliferum
11. Syringocystadenoma papilliferum
12. Tubular apocrine adenoma
13. Erosive adenomatosis of the nipple

E. Cysts

1. Epidermal cyst
2. Milium
3. Dermoid cyst
4. Trichilemmal cyst
5. Steatocystoma multiplex
6. Eruptive vellus hair cyst
7. Pilonidal sinus
8. Branchial cyst
9. Median raphe cyst of the penis

F. Neural tumors

1. Neurofibroma
2. Neurilemmoma
3. Traumatic neuroma
4. Rudimentary polydactyly
5. Granular-cell tumor

G. Hemangiomas and vascular malformations

1. Hemangioma simplex
2. Strawberry mark
3. Cherry angioma
4. Glomeruloid hemangioma
5. Venous lake
6. Spider angioma
7. Angiokeratoma
8. Cavernous hemangioma
9. Kasabach-Merritt syndrome
10. Cutaneous arteriovenous malformation
11. Tufted angioma
12. Spindle-cell hemangioendothelioma
13. Glomus tumor
14. Hemangiopericytoma
15. Lymphangioma
16. Pyogenic granuloma
17. Intravascular papillary endothelial hyperplasia

H. Fibrous tumors

1. Soft fibroma
2. Dermatofibroma
3. Hypertrophic scar, Keloid
4. Palmoplantar fibromatosis
5. Dorsal fibromatosis
6. Pearly penile papule
7. Acquired digital fibrokeratoma
8. Fibrous papule of the nose
9. Elastofibroma
10. Sclerotic fibroma
11. Nodular fasciitis
12. Giant cell tumor of the tendon sheath
13. Desmoid tumor
14. Cutaneous myxoma
15. Digital mucous cyst, ganglion
16. Mucous cyst of the oral mucosa
17. Pseudocyst of the auricle

I. Histiocytic tumors

1. Juvenile xanthogranuloma
2. Verruciform xanthoma
3. Multicentric reticulohistiocytosis
4. Benign cephalic histiocytosis

J. Adipocellular tumor


K. Myogenic tumor


L. Osteogenic tumors

1. Osteoma cutis
2. Subungual exostosis

M. Hematopoietic tumors

1. Lymphocytoma cutis
2. Lymphocytic infiltration of the skin (Jessner)
3. Kimura’s disease
4. Angiolymphoid hyperplasia with eosinophilia (ALHE)
5. Mastocytosis

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