Dermatological

Henna The Beautiful Art Of Making Money

Online Henna Courses

Get Instant Access

Amyloid (primary) Basal cell carcinoma Bacterial infection Bowen's disease Fungal infection

Laugier-Hunziker-Baran syndrome Lichen planus Malignant melanoma Peutz-Jeghers-Touraine syndrome Porphyria cutanea tarda Radiotherapy and radiodermatitis Regional and local Carpal tunnel syndrome Repeated minor injuries Friction

Trauma (acute or repeated)_

significant abnormalities can produce brown or black discoloration (Table 7.2). Most of the causes will be self-evident at the time of presentation, either from the history or on

An acquired single streak of dark pigmentation is a melanoma until proved otherwise careful medical examination. Bearing in mind the potential risk of malignant melanoma, one should rule out the other conditions that may present with this sign (Table 7.3). When no specific cause is found, the following features

Figure 7.10

Longitudinal melanonychia—congenital naevus.

Figure 7.10

Longitudinal melanonychia—congenital naevus.

Figure 7.11

Aquired longitudinal melanonychia.

Figure 7.13

Fuchsin nail staining—Castellani's paint.

Figure 7.13

Fuchsin nail staining—Castellani's paint.

Figure 7.14

Brown staining due to henna.

Figure 7.14

Brown staining due to henna.

Figure 7.15

Silver nitrate staining.

Figure 7.15

Silver nitrate staining.

Figure 7.16

Brown staining due to potassium permanganate.

Figure 7.16

Brown staining due to potassium permanganate.

should be considered indicative of possible malignant melanoma:

• only one digit affected

• periungual spread of the pigmentation

• darkening of an established band

• progressive widening of the linear streak with blurring of its border

Linear pigmentation not reaching the free edge of the nail is unlikely to be due to a melanocytic focus in the matrix. The following conditions should also be excluded:

• associated non-melanoma periungual pigmentation (pseudo-Hutchinson's sign)

• single longitudinal melanonychia due to metastases of distant malignant melanoma

• non-migratory haematoma or foreign body.

The dangers of misdiagnosis are:

1 Proper treatment of subungual melanoma may be delayed, leading to tumour spread and even death.

Was this article helpful?

0 0
How To Prevent Skin Cancer

How To Prevent Skin Cancer

Complete Guide to Preventing Skin Cancer. We all know enough to fear the name, just as we do the words tumor and malignant. But apart from that, most of us know very little at all about cancer, especially skin cancer in itself. If I were to ask you to tell me about skin cancer right now, what would you say? Apart from the fact that its a cancer on the skin, that is.

Get My Free Ebook


Post a comment