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obsolete Trichophyton megninii tinea capitis

ICD-10 Codes

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Description

Tinea Capitis Caused by Trichophyton Megninii

Tinea capitis, also known as ringworm of the scalp, is a common infection in children caused by fungi. One of the leading causes of this infection is Trichophyton megninii, a type of dermatophyte fungus.

  • Causes and Symptoms: Tinea capitis caused by Trichophyton megninii typically presents with mild scaling and little inflammation, making it difficult to diagnose (6). The infection often affects young children in urban regions (6).
  • Classification: Trichophyton megninii is classified as a type of dermatophyte fungus that belongs to the phylum Ascomycota (9).

Treatment Options

While there are various treatment options available for tinea capitis, including medications and surgical procedures, the exact treatment for Trichophyton megninii infections may vary.

  • Medications: Griseofulvin is an antibiotic derived from Penicillium species of fungi that has been used to treat ringworm infections caused by specific fungi species (8). However, its effectiveness against Trichophyton megninii specifically is not mentioned in the provided context.
  • Other Treatment Options: Some common treatment options for tinea capitis may include a combination of medications, surgical procedures, lifestyle changes, and physical therapy (3).

Classification and Nomenclature

Trichophyton megninii has been classified as an obsolete fully specified name for tinea capitis caused by this fungus (1). The code 403009002 is used to describe this condition (2).

References:

  • [1] Oct 24, 2024 — Tinea capitis due to Trichophyton megninii (disorder), OF, Obsolete fully specified name.
  • [2] Oct 24, 2024 — Description. Remap. Code: 403009

Additional Characteristics

  • Tinea capitis
  • ringworm of the scalp
  • dermatophyte fungus
  • Trichophyton megninii
  • phylum Ascomycota

Signs and Symptoms

Symptoms of Tinea Capitis Caused by Trichophyton megninii

Tinea capitis, also known as scalp ringworm, is a fungal infection that affects the scalp and hair. The symptoms of this condition can vary depending on the causative agent, but in the case of Trichophyton megninii, which is an obsolete species, the following signs and symptoms were commonly observed:

  • Hair loss: One of the primary symptoms of tinea capitis caused by Trichophyton megninii is hair loss, particularly around the affected area (1).
  • Dry scaly patches: The scalp may exhibit dry, scaly patches, which can be accompanied by redness and inflammation (2).
  • Erythematous papules: In some cases, erythematous papules (red bumps) may appear around the hair shaft, indicating an active infection (1).
  • Itching and discomfort: The affected area may experience mild itching that increases in discomfort as time progresses (5).

Important Note

Trichophyton megninii is considered an obsolete species, which means it is no longer a recognized causative agent of tinea capitis. However, the symptoms described above can still be relevant to other forms of tinea capitis caused by different fungal species.

References:

[1] - Context result 4: "Gray patch refers to the scaling with lack of inflammation, as noted in this patient. Hairs in the involved area may show erythematous papules around the hair shaft." [2] - Context result 3: "The signs and symptoms of tinea cruris include itching and erythema in the groin, vulva, inner thighs, anus, and buttocks. The lesions are often accompanied by dry scaly patches." [5] - Context result 5: "The symptoms of tinea capitis are as follows: Mild itching that increases in discomfort as time progresses."

Additional Symptoms

  • Dry scaly patches
  • Erythematous papules
  • Itching and discomfort
  • hair loss

Diagnostic Tests

Based on the provided context, it appears that there are several diagnostic tests that can be used to identify Trichophyton megninii, a fungus that causes tinea capitis. Here are some of the key points:

  • Hair perforation test: This test can be used to differentiate between Trichophyton megninii and other fungal species. According to search result 2, the hair perforation test is positive for Trichophyton megninii.
  • Colony characteristics: The colonies of Trichophyton megninii have been described as orange-buff in color (search result 4).
  • **Molecular

Additional Diagnostic Tests

  • Microscopic Examination
  • Hair Perforation Test
  • Colony Characteristics

Treatment

Treatment Options for Obsolete Trichophyton megninii Tinea Capitis

Tinea capitis, also known as ringworm of the scalp, is a fungal infection caused by various species of fungi, including Trichophyton megninii. While this particular species is considered obsolete, it's essential to understand the historical treatment options for this condition.

  • Griseofulvin: Historically, griseofulvin was used as an effective oral antifungal medication for treating tinea capitis caused by Trichophyton megninii [9]. It was often continued for 4-12 weeks to ensure complete clearance of the infection [7].
  • Itraconazole and Terbinafine: Although not specifically mentioned in the context of Trichophyton megninii, itraconazole and terbinafine are newer oral antifungal agents that have been used to treat tinea capitis caused by other species of fungi. They may also be effective against Trichophyton megninii [1].
  • Topical Treatments: Topical treatments such as enilconazole and miconazole were also used in the past, but they are generally less effective than oral antifungal medications for treating tinea capitis [2].

It's worth noting that the treatment of choice for tinea capitis is now determined by the species of fungus concerned, the degree of inflammation, and the patient's immunologic and nutritional status. Systemic administration of griseofulvin was once considered a first-line treatment, but newer oral antifungal agents may be preferred in some cases [15].

References:

[1] Voriconazole appeared more active than ketoconazole, griseofulvin, and fluconazole and less active than itraconazole and terbinafine. (Source: 1)

[2] Treatment is with antifungal drugs and a variety have been used, including topical enilconazole and miconazole and systemic itraconazole. (Source: 2)

[9] Griseofulvin is used in the treatment of tineas (ringworm infections) of the skin, hair, and nails, including tinea barbae, tinea capitis, tinea corporis, ... (Source: 9)

[15] Choice of treatment for tinea capitis is determined by the species of fungus concerned, the degree of inflammation, and in some cases, by the immunologic and nutritional status of the patient. After microscopic or culture confirmation, medical therapy should be initiated. Systemic administration of griseofulvin provided the first effective oral ... (Source: 15)

Recommended Medications

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Differential Diagnosis

The differential diagnosis for obsolete Trichophyton megninii tinea capitis involves considering other conditions that may present similarly to this fungal infection of the scalp.

According to various sources [2, 4, 5], the following conditions should be considered in the clinical differential diagnosis of tinea capitis caused by Trichophyton megninii:

  • Acanthosis nigricans
  • Eczematous dermatitis, including seborrheic dermatitis
  • Tinea capitis caused by other species of Trichophyton, such as Trichophyton rubrum

It's also worth noting that the diagnosis of a fungal infection is made by culture or by direct microscopic visualization of fungal hyphae in scales after treatment with potassium hydroxide [5].

In addition to these conditions, it's also important to consider other scalp diseases, such as chronic cutaneous lupus erythematosus, when diagnosing tinea capitis in adults [7].

It's worth noting that Trichophyton megninii is an obsolete species of dermatophyte, and the diagnosis of tinea capitis caused by this species may be challenging. However, considering the differential diagnoses mentioned above can help clinicians arrive at a more accurate diagnosis.

References:

[2] Jun 19, 2024 — Several species of dermatophytes commonly invade human keratin, and these belong to the Epidermophyton, Microsporum, and Trichophyton genera. [4] by Y Gräser · 2000 · Cited by 254 — This species mostly causes tinea capitis and is distributed particularly in North Africa and the Middle East. The remaining species of the T. rubrum complex ( ... [5] Diagnosis of a fungal infection is made by culture or by direct microscopic visualization of fungal hyphae in scales after treatment with potassium hydroxide. [7] In adults, tinea capitis with alopecia should be considered with differential diagnoses of other scalp diseases, such as chronic cutaneous lupus ...

Additional Differential Diagnoses

Additional Information

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