obsolete non-neoplastic nevus of skin

Based on the provided context, it appears that there are several types of non-neoplastic nevi (moles) that have been described in medical literature.

• Eruptive Collagenoma: This is a type of non-neoplastic collagenous tumor that can appear as small, rounded or oval-shaped lesions on the skin. They are typically found on the trunk and limbs, and are often associated with conditions such as tuberous sclerosis complex [1].
• Sclerotic Fibroma: This is a rare, benign growth that occurs in the dermis of the skin. It is characterized by a firm, fibrous texture and can appear as a small, rounded or oval-shaped lesion on the skin [4].
• Shagreen patch: This is a type of non-neoplastic collagenous tumor that can appear as a flat, irregularly-shaped lesion on the skin. It is often associated with conditions such as tuberous sclerosis complex [4].

It's worth noting that these types of nevi are considered obsolete and are no longer commonly used in modern medical literature.

References:

[1] Context result 8 [2] Context result 14 [3] Context result 4 [4] Context result 14

Based on the provided context, it appears that there are several search results related to nevi (birthmarks) and melanoma. However, I'll focus on finding information about signs and symptoms of obsolete non-neoplastic nevus of skin.

According to search result [4], Slate gray nevi (previously known as Mongolian blue spots) are a type of birthmark that resembles a bruise. They are not harmful and often disappear at a certain age. However, this information is about a specific type of benign nevus, which might not be what you're looking for.

Search result [7] mentions that any form of melanocytic nevus may occur as a congenital tumor, demonstrating a tendency to grow into or along dermal appendages or neurovascular structures. This statement seems to imply that some types of nevi can have growth tendencies, but it doesn't specifically mention obsolete non-neoplastic nevus.

Search result [9] describes a polymorphous eruption consisting of erythematous macules, papules, pustules, and wheals. However, this information is more related to an inflammatory condition rather than a benign nevus.

Unfortunately, I couldn't find any specific information about the signs and symptoms of obsolete non-neoplastic nevus of skin in the provided context. It's possible that this topic might not be well-represented in the search results or might require more specific keywords to yield relevant information.

However, based on the general knowledge about nevi, I can provide some general information:

• Non-neoplastic nevi are benign growths that do not have the potential to become cancerous.
• They can appear as flat or raised patches of skin and may be present at birth or develop later in life.
• Some types of non-neoplastic nevi might fade away over time, while others remain stable.

Please note that this information is general and might not specifically address your question about obsolete non-neoplastic nevus. If you have any further questions or would like me to search again, please let me know!

Based on the provided context, it appears that there are several diagnostic tests and methods that can be used to identify non-neoplastic lesions of the skin, which may resemble nevi or melanomas.

• Scanning Electron Microscopy (SEM): According to [1], Scanning EM is useful for diagnosing rare genetic hair shaft abnormalities. Additionally, SEM can be used to identify certain mineral deposits in the skin, which may help differentiate non-neoplastic lesions from neoplastic ones.
• Biopsy: While biopsy is not specifically mentioned as a diagnostic test for obsolete non-neoplastic nevus of skin, it is mentioned in [3] that biopsy of pigmented lesions with a diameter of 6 mm has been found to result in a far higher yield of melanomas. This suggests that biopsy may be used to rule out melanoma in cases where the diagnosis is uncertain.
• Genetic testing: Genetic testing, particularly gene expression panels, has been explored by researchers as a potential diagnostic tool for cases without a biopsy [4]. However, it is not clear if this method would be specifically useful for diagnosing obsolete non-neoplastic nevus of skin.
• Multispectral imaging (MSI): A study published in [6] aims to introduce an MSI-based method for the early screening and detection of skin surface lesions. While this may be relevant to identifying neoplastic lesions, it is not clear if MSI would be useful for diagnosing obsolete non-neoplastic nevus of skin.
• Dermoscopy: Dermoscopy has been shown to enhance diagnosis compared to simple naked-eye examination [9]. However, its utility in specifically diagnosing obsolete non-neoplastic nevus of skin is unclear.

It's worth noting that the provided context does not mention any specific diagnostic tests or methods for obsolete non-neoplastic nevus of skin. Therefore, it may be necessary to consult additional sources or experts in dermatology for a more accurate and comprehensive answer.

References: [1] - Context 1 [3] - Context 3 [4] - Context 4 [6] - Context 6 [9] - Context 9

The differential diagnosis for an obsolete non-neoplastic nevus of the skin involves considering various conditions that may present similarly to a benign melanocytic nevus.

• Melanoma: A clear-cut distinction between a nevus and a melanoma is often impossible in such lesions, making biopsy and histopathological analysis essential for accurate diagnosis [2][5].
• Post-inflammatory hyperpigmentation: This condition can mimic the appearance of a non-neoplastic nevus, particularly if it presents with pigmented patches or macules [10].
• Dermal melanocytic nevus: A congenital tumor that may occur as a form of melanocytic nevus, which can grow into or along dermal appendages or neurovascular structures [3].
• Auricular appendix: This condition can be mistaken for a dermal melanocytic nevus clinically and histologically for a hair follicle [8].

It's essential to note that diagnosis is typically made by biopsy and analysis of any skin lesion that has signs of being potentially cancerous. Avoiding UV light and using sunscreen in UV-bright sun environments may also be recommended as part of prevention strategies [4].