(1)
Alo Eye Care, Kolkata, India
Keywords
Histopathological classificationTNM classificationStaging4.1 Introduction
On the basis of current knowledge, tumors are best classified or delineated based on three parameters: tumor site, histopathologic appearance, and behavior. Lid tumors thus may be classified into a variety of segments depending on clinical and histologic presentation (TNM [tumor, nodes (lymph), metastasis] classification and histopathologic classification, respectively). Staging also may be done based on clinical and histologic correlation.
4.2 Histopathological Classification of Eyelid Tumors
A.
Benign tumors of the epidermis of the eyelids
1.
Papilloma
2.
Keratoacanthoma
3.
Seborrheic keratosis
B.
Premalignant and malignant tumors of the surface epithelium of the eyelids
1.
Actinic keratosis
2.
Basal cell carcinoma
3.
Squamous cell carcinoma
C.
Glandular and adnexal tumors of the eyelids
1.
Sebaceous/meibomian gland carcinoma
2.
Sweat gland tumors
(a)
Syringoma
(b)
Eccrine acrospiroma
(c)
Carcinoma (meibomian gland cancer)
3.
Hair follicle tumors
(a)
Trichoepithelioma
(b)
Trichofolliculoma
(c)
Trichilemmoma
(d)
Pilomatrixoma (calcifying epithelioma of Malherbe)
D.
Melanocytic tumors of the eyelids
1.
Nevus
2.
Oculodermal melanocytosis (nevus of Ota)
3.
Lentigo maligna (melanotic freckle of Hutchinson)
4.
Primary malignant melanoma lid
E.
Neurogenic tumors of the eyelids
1.
Neurofibroma
2.
Neurilemmoma (schwannoma)
3.
Merkel cell tumor (neuroendocrine carcinoma of skin)
F.
Vascular tumors of the eyelids
1.
Congenital Capillary Hemangioma
2.
Acquired Capillary Hemangioma
3.
Nevus flammeus
4.
Varix
5.
Lymphangioma
6.
Kaposi’s sarcoma
7.
Angiosarcoma
G.
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Lymphoid tumors of the eyelids
