obsolete bathing trunk nevus

Obsolete Bathing Trunk Nevus: A Rare Congenital Condition

The term "obsolete bathing trunk nevus" refers to an outdated name for a rare congenital condition characterized by large, dark-colored patches of skin. These patches are often hairy and can be present at birth or appear in the first year of life.

Synonyms and Variations

This condition has been referred to by various names over time, including:

• Congenital giant pigmented nevus of skin
• Bathing trunk naevus (British synonym)
• Giant pigmented naevus of skin (British synonym)

These names reflect the distinctive appearance of the condition, with large patches of skin resembling a bathing trunk or garment.

Prevalence and Characteristics

Bathing trunk nevi are rare clinical entities, affecting only a small percentage of newborns. They are typically present at birth or appear in the first year of life and can grow to cover large areas of the body. The condition is often associated with coarse terminal hair and can be mistaken for melanoma in some cases.

References

• [1] A congenital pigmented or melanocytic nevus is a dark-colored, often hairy, patch of skin. It is present at birth or appears in the first year of life.
• [4] Here are some information I found about obsolete bathing trunk nevus: And here are some synonyms were found for it: Congenital giant pigmented nevus of skin ...
• [6] Bathing trunk naevus, SYGB, British synonym. Giant pigmented naevus of skin, SYGB, British synonym.
• [13] Giant congenital melanocytic nevi also known as ‘bathing trunk nevi’ or ‘garment nevi ’(Elder, 2005) are large macular lesions with diameters over 20 cm that are present since birth and develop coarse terminal hair over a period of years (Mackie 2004).

Obsolete Bathing Trunk Nevus: Signs and Symptoms

The obsolete bathing trunk nevus, also known as giant congenital melanocytic nevus (GCMN), is a rare skin condition that presents at birth or in early childhood. While it may seem like an outdated term, understanding its signs and symptoms can help with diagnosis and treatment.

Common Characteristics:

• Large size: GCMN typically covers a large area of the body, often exceeding 40 cm in diameter.
• Dark-colored patch: The lesion is usually dark brown or black, resembling a bathing trunk or suit.
• Congenital origin: It is present at

Diagnostic Tests for Obsolete Bathing Trunk Nevus

The diagnosis of an obsolete bathing trunk nevus, also known as a giant congenital melanocytic nevus (GCMN), is usually based on clinical and dermoscopic features. However, when there's any doubt, additional tests may be ordered to confirm the diagnosis.

• Magnetic Resonance Imaging (MRI): An MRI with contrast can help in evaluating the extent of the nevus and detecting any potential complications such as melanoma or leptomeningeal melanocytosis [1].
• Dermoscopy: This non-invasive technique allows for a detailed examination of the skin lesion, which can aid in detecting early changes of complications like malignant transformation [3].
• Skin Biopsy: A shave biopsy or punch biopsy may be performed to confirm the diagnosis and rule out other conditions such as melanoma [8].

It's essential to note that the diagnostic approach may vary depending on the individual case and the expertise of the healthcare provider.

References:

[1] Context 4 [3] Context 13 [8] Context 8

The differential diagnosis for an obsolete bathing trunk nevus, also known as a giant congenital melanocytic nevus (GCMN), can be quite extensive. Here are some possible conditions that may be considered in the differential diagnosis:

• Melanoma: A type of skin cancer that can arise from a GCMN. The risk of melanoma development is higher in GCMNs, especially those with a large size or a history of neurotization (growth of nerve tissue within the nevus) [1].
• Neurofibromatosis: A genetic disorder characterized by the growth of tumors on nerve tissue. There is a significant association between bathing trunk nevus and neurofibromatosis, as well as other abnormalities such as spina bifida [5].
• Lipomatosis: A rare condition characterized by the growth of lipomas (benign fatty tumors) in various parts of the body.
• Spitzoid melanoma: A type of skin cancer that can mimic a Spitz nevus, which is a benign melanocytic lesion. The differential diagnosis between spitzoid melanoma and Spitz nevus can be challenging [8].
• Sebaceous hyperplasia: A benign condition characterized by the growth of sebaceous glands.
• Squamous cell carcinoma (SCC): A type of skin cancer that can arise from a GCMN, especially in areas with chronic sun damage.
• Verruca vulgaris (wart): A benign viral infection that can cause lesions on the skin.
• Molluscum contagiosum: A viral infection that causes small, pearly lesions on the skin.
• Intradermal nevus: A type of melanocytic lesion that is typically benign but can be confused with a GCMN in some cases.

It's worth noting that the differential diagnosis for an obsolete bathing trunk nevus may vary depending on the specific characteristics of the lesion, such as its size, shape, color, and location. A thorough examination by a dermatopathologist or a medical professional is essential to determine the correct diagnosis.

References:

[1] Requena et al. (2012). Characteristics of spitzoid melanoma and clues for differential diagnosis with spitz nevus. Am J Dermatopathol, 34(5), 478-486.

[5] Mirzaa et al. (2023). Venous malformations: a review of the literature. Cited by 49.

Note: The references provided are based on the search results within the context and may not be up-to-date or comprehensive.