NEUROECTODERMAL

TUMOURS, MIXED TUMOURS,

TERATOMAS,

CHORIONEPITHELIOMA.

XI. practical training

3rd year General Medicine

Neurinoma

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Neurinoma

Neurinoma

Neurofibroma

Neurofibroma

Pigmentary naevus

Pigmentary naevus

Patologic pigmentation of skin, defect of melanin -

vitiligo

1 Normal presence of melanin

in basal layer

2 Defect of melanin in basal layer

2

1

Patologic pigmentation of skin, defect of melanin –

vitiligo, impregnation of melaninu (Masson)

1 Normal presence of melanin in

in basal layer

2 Defect of melanin in basal layer

1 2

Mixed naevocellular naevus

1

2

1 Normal skin

2 Naevus

Mixed naevocellular naevus

1

2

1 Junctional component

2 Intradermal component

3 Epidermis

4 Rete ridges

1 3 4

Mixed naevocellular naevus

1

2

3

1 Junctional component

2 Intradermal component

3 Pigment (melanin)

4 Epidermis

4

Intradermal naevocellular naevus

1

2

1 Normal skin

2 Naevus

3 Epidermis

4 Hair folicle

5 Sebaceous gland 3

4

5

Intradermal naevocellular naevus

1

2

1 Epidermis

2 Groups of melanocytes

3 Collagenous fibres of cutis

3

Intradermal naevocellular naevus

1

2

3

1 Hair folicle

2 Melanocytes

3 Collagenous fibres of cutis

Malignant melanoma (melanoblastoma)

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Malignant melanoma (melanoblastoma)

Malignant melanoma (melanoblastoma)

Malignant melanoma (melanoblastoma)

Malignant melanoma (melanoblastoma)

Malignant melanoma (melanoblastoma)

Malignant melanoma (melanoblastoma)

Malignant melanoma (Fontana)

Melanin in tumour cells

(lentigo maligna melanom)

1

1

2

1 Melanin in tumour cells

2 Melanin fagocyted in

histiocytes (released from

tumour cells)

3 Keratinized layer of epidermis

3

Nodular melanoma

Meningeoma

Meningeoma

Astrocytoma

Astrocytoma

Oligodendroglioma

Ependymoma

Glioblastoma

Glioblastoma

Fibroadenoma mammae

Fibroadenoma mammae

Pleiomorphic adenoma (myxochondroepithelioma)

Nefroblastoma (Wilms‘ tumour)

Teratoma

Teratoma

Choriocarcinoma

Choriocarcinoma