 Site created by Dr Sampurna Roy MD
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Dr. Sampurna Roy MD
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Surgical-Pathology.com
INDEX: A-D ; INDEX: E-L ;INDEX: M-P ;INDEX: Q-Z ; FUNGAL DISEASE ; VIRAL DISEASE. |
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Melanocytic tumours 1. Acquired Melanocytic Naevus
Ancient Naevus
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Pathology of the Eyelid Inflammatory diseases of the Eyelid Tumour and tumour-like lesions of the Eyelid Epidermal tumours of the Eyelid |
| The tumour should
contain more than 50% balloon cells. There are distinct areas of
characteristic melanoma cells and prominent mitoses. Occasional
intraepidermal pagetoid spread may be present.
The main differential diagnosis is balloon cell naevus. The cytoplasmic features of the balloon cells observed in balloon cell melanoma resemble those noticed in balloon cell naevus, but the presence of nuclear pleomorphism, atypia, and mitoses and the absence of intervening stroma help distinguish balloon cell melanoma. Microscopically, balloon cell melanoma also must be differentiated from other clear cell tumours such as clear cell sarcoma (malignant melanoma of soft parts), hibernoma, xanthelasma , sebaceous neoplasms, metastatic renal cell carcinoma, porocacinoma, (malignant) granular cell tumour, granular (clear) cell basal cell carcinoma, clear cell syringoma, and atypical fibroxanthoma. |
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Pigmented melanocytic lesions causing diagnostic
problems Prognostic parameters of melanoma Superficial spreading melanoma |
| Epidermal tumours: |