White spongy nevus (fungiform nevus) is a benign neoplasm characterized by increased fibroblast proliferation and the presence of papillae, fibrous tissue in the dermis, and epidermal hyperplasia. This disease is less common than common pigmented nevi and appears as small or large plaques on the skin that can be white, yellowish, or flesh-colored. This formation has a characteristic spongy appearance due to the presence of many small pores and voids in its structure, which is due to the peculiarities of its formation in the dermis. It is often observed in young and middle-aged individuals, although it can occur at any age. Unlike melanoma, white spongy nevus does not have mature cells and is not capable of invasion. However, it is clinically important to distinguish it from other skin lesions, which makes diagnosis an important part of the process.
History of the disease and interesting historical facts
The white spongiform nevus was first described in the early 20th century, and its study attracted the attention of dermatologists and pathologists worldwide. In the 1920s, the first classifications of nevi were proposed, which helped in their further division into pigmented and non-pigmented forms. Interestingly, in ancient times, skin ailments were traditionally associated with various folk beliefs and religious ideas. For example, in some cultures, nevi were considered signs of fate or even symbols of divine intervention. Despite advances in scientific understanding, these ideas about nevi persisted for many centuries, which shows how difficult it was to separate myth from science.
Epidemiology
According to statistics, white spongy nevus occurs in approximately 1-3% of the population, but the exact figures may vary depending on the region and ethnic group. The prevalence of this disease is not related to gender, both men and women are equally susceptible to it. Studies show that nevi occupy a significant place among all skin diseases, but white spongy nevi are a less common variant compared to pigmented forms. More frequent detection of such nevi is observed in patients with weakened immunity, for example, in people who have undergone organ transplants or in those undergoing immunosuppressive therapy.
Genetic predisposition to this disease
Research suggests that certain genetic mutations may play a role in the development of white spongiform nevus. Literature describes the involvement of genes associated with skin cell proliferation and differentiation, but specific mutations remain poorly understood. It is suggested that abnormalities in the expression of genes such as TP53 and RAS may contribute to the development of nevus changes. In some cases, familial occurrence of white spongiform nevus has also been reported, indicating a possible hereditary predisposition.
Risk factors for the development of this disease
There are several risk factors that contribute to the development of white spongy nevus. The main ones include:
- Physical factors: constant exposure to ultraviolet radiation, especially in people with fair skin.
- Chemical factors: exposure to certain toxic substances such as benzene or formaldehyde derivatives, which can cause changes in the skin.
- Immunocompromised states: Conditions such as HIV/AIDS or use of immunosuppressants after organ transplantation may increase the risk.
- Age: Although nevi can occur at any age, the risk of developing them may increase with age.
- Ethnicity: Certain ethnic groups may be predisposed to introducing nevi into the genetic pool.
Diagnosis of this disease
Diagnosis of white spongy nevus is based on visual examination and several additional procedures:
- Main symptoms: whitish or pinkish plaques on the skin, sometimes with itching or redness.
- Laboratory tests: may include tests for the presence of human papillomavirus and other infections that cause dermatoses.
- Radiological examinations: in case of deep lesions, ultrasound diagnostics may be prescribed to detect changes in the dermis.
- Other types of diagnostics: dermatoscopy, which allows one to evaluate the structure of the nevus in detail.
- Differential diagnosis: It is important to differentiate white spongy nevus from similar lesions such as flat keratosis and actinic keratosis.
Treatment
Treatment for white spongiform nevus can vary:
- General treatment: first of all, this means monitoring the condition of the skin and observing personal hygiene rules.
- Pharmacological treatment: The use of topical corticosteroids may help reduce inflammation and discomfort.
- Surgical treatment: in cases of large formations or if there is a suspicion of malignancy, removal of the nevus may be indicated.
- Other treatments: Laser therapy and cryotherapy may be used to remove or reduce nevus lesions.
List of medications used to treat this disease
Drugs used may include:
- Topical corticosteroids (eg, hydrocortisone, betamethasone).
- Medicines to prevent infections when the skin is damaged (antibiotics).
- Immunomodulators (eg, tacrolimus) for cases of pyoderma.
- Anesthetic ointments before surgery.
Disease monitoring
Monitoring the condition of the skin where there is a white spongy nevus is important:
- Control stages: regular examinations by a dermatologist to assess changes in the size and color of the formation.
- Prognosis: favorable in most cases, however the presence of nevi requires constant monitoring.
- Complications: there is a risk of malignancy, especially if the formation is traumatized, so it is necessary to monitor changes.
Age-related features of the disease
Age groups show different characteristics of the course of white spongy nevus:
- Children: Nevi often appear in childhood and may disappear with age.
- Adolescents and young adults: At this age, an increase in the size and change in color of the nevus is often observed.
- Adults: The risk of malignancy of a nevus increases in adulthood, regular examinations are necessary.
Questions and Answers
- What is white spongy nevus? It is a benign skin lesion that is the result of fibroblast proliferation with a characteristic spongy appearance.
- What are the causes of white spongy nevus? Causes may include genetic predisposition, exposure to ultraviolet radiation, and certain chemical factors.
- What are the symptoms of white spongy nevus? Whitish or flesh-colored plaques on the skin predominate, itching and redness in the area of the formations are possible.
- How is white spongy nevus treated? Treatment includes topical corticosteroids, surgical removal if necessary, and other methods such as laser therapy.
- How often should the condition of a nevus be monitored? It is recommended to undergo examination by a dermatologist every 6-12 months to assess the dynamics of the nevus.
