Folliculitis

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Folliculitis
Folliculitis, Fungal; Pustular Diseases

Image courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology
ICD-10 L73.8
ICD-9 xxx
DiseasesDB 31367
eMedicine DERM/159 

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List of terms related to Folliculitis

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Jesus Rosario Hernandez, M.D. [2].

Overview

Folliculitis is the inflammation of one or more hair follicles. The condition may occur anywhere on the skin.

Classification

  • [Disease name] may be classified according to [classification method] into [number] subtypes/groups:
  • [group1]
  • [group2]
  • [group3]
  • Other variants of [disease name] include [disease subtype 1], [disease subtype 2], and [disease subtype 3].

Pathophysiology

  • The pathogenesis of [disease name] is characterized by [feature1], [feature2], and [feature3].
  • The [gene name] gene/Mutation in [gene name] has been associated with the development of [disease name], involving the [molecular pathway] pathway.
  • On gross pathology, [feature1], [feature2], and [feature3] are characteristic findings of [disease name].
  • On microscopic histopathological analysis, [feature1], [feature2], and [feature3] are characteristic findings of [disease name].

Clinical Features

Differentiating [disease name] from other Diseases

  • [Disease name] must be differentiated from other diseases that cause [clinical feature 1], [clinical feature 2], and [clinical feature 3], such as:
  • [Differential dx1]
  • [Differential dx2]
  • [Differential dx3]

Epidemiology and Demographics

  • The prevalence of [disease name] is approximately [number or range] per 100,000 individuals worldwide.
  • In [year], the incidence of [disease name] was estimated to be [number or range] cases per 100,000 individuals in [location].
  • Superficial Folliculitis is although commonly seen but the exact incidence is not known.

Age

  • Patients of all age groups may develop [disease name].
  • [Disease name] is more commonly observed among patients aged [age range] years old.
  • Superficial Folliculitis and Hot tub folliculitis is more commonly observed among adults than children.
  • Demodex folliculitis is more commonly seen in adults however it also has been implicated in facial pustules and papules in children.[1]

Gender

  • Superficial Folliculitis affects men and women equally.
  • Males are more commonly affected with Herpes folliculitis and Pityrosporum folliculitis[2] than females.
  • Eosinophilic Folliculitis has been seen in HIV-infected men, women, and children. [3][4][5]
  • The [gender 1] to [Gender 2] ratio is approximately [number > 1] to 1.

Race

  • There is no racial predilection for [disease name].
  • Pseudofolliculitis barbae usually affects individuals of the African descent.
  • [Race 2] individuals are less likely to develop [disease name].

Causes

Most carbuncles and furuncles and other cases of folliculitis develop from Staphylococcus aureus.

Folliculitis starts when hair follicles are damaged by friction from clothing, blockage of the follicle, or shaving. In most cases of folliculitis, the damaged follicles are then infected with the bacteria Staphylococcus (staph).

Iron deficiency anemia is sometimes associated with chronic cases

  • Sycosis barbae or barber's itch is a staph infection of the hair follicles in the bearded area of the face, usually the upper lip. Shaving aggravates the condition.
  • Pseudofolliculitis barbae is a disorder occurring primarily in men of African descent. If curly beard hairs are cut too short, they may curve back into the skin and cause inflammation.
  • Hot tub folliculitis is caused by the bacteria Pseudomonas aeruginosa often found in new hot tubs. The folliculitis usually occurs after sitting in a hot tub that was not properly cleaned before use. Symptoms are found around the body parts that sit in the hot tub -- typically the legs, hips and buttocks and surrounding areas. Symptoms are typically amplified around regions that were covered by wet clothing, such as bathing suits.

Risk Factors

  • Common risk factors in the development of [disease name] are [risk factor 1], [risk factor 2], [risk factor 3], and [risk factor 4].

Natural History, Complications and Prognosis

  • The majority of patients with [disease name] remain asymptomatic for [duration/years].
  • Early clinical features include [manifestation 1], [manifestation 2], and [manifestation 3].
  • If left untreated, [#%] of patients with [disease name] may progress to develop [manifestation 1], [manifestation 2], and [manifestation 3].
  • Common complications of [disease name] include [complication 1], [complication 2], and [complication 3].
  • Prognosis is generally [excellent/good/poor], and the [1/5/10­year mortality/survival rate] of patients with [disease name] is approximately [#%].

Diagnosis

Diagnostic Criteria

  • The diagnosis of [disease name] is made when at least [number] of the following [number] diagnostic criteria are met:
  • [criterion 1]
  • [criterion 2]
  • [criterion 3]
  • [criterion 4]

Symptoms

  • [Disease name] is usually asymptomatic.
  • Symptoms of [disease name] may include the following:
  • [symptom 1]
  • [symptom 2]
  • [symptom 3]
  • [symptom 4]
  • [symptom 5]
  • [symptom 6]

Physical Examination

  • Patients with [disease name] usually appear [general appearance].
  • Physical examination may be remarkable for:
  • [finding 1]
  • [finding 2]
  • [finding 3]
  • [finding 4]
  • [finding 5]
  • [finding 6]

Laboratory Findings

  • There are no specific laboratory findings associated with [disease name].
  • A [positive/negative] [test name] is diagnostic of [disease name].
  • An [elevated/reduced] concentration of [serum/blood/urinary/CSF/other] [lab test] is diagnostic of [disease name].
  • Other laboratory findings consistent with the diagnosis of [disease name] include [abnormal test 1], [abnormal test 2], and [abnormal test 3].

Imaging Findings

  • There are no [imaging study] findings associated with [disease name].
  • [Imaging study 1] is the imaging modality of choice for [disease name].
  • On [imaging study 1], [disease name] is characterized by [finding 1], [finding 2], and [finding 3].
  • [Imaging study 2] may demonstrate [finding 1], [finding 2], and [finding 3].

Other Diagnostic Studies

  • [Disease name] may also be diagnosed using [diagnostic study name].
  • Findings on [diagnostic study name] include [finding 1], [finding 2], and [finding 3].

Treatment

Medical Therapy

  • There is no treatment for [disease name]; the mainstay of therapy is supportive care.
  • The mainstay of therapy for [disease name] is [medical therapy 1] and [medical therapy 2].
  • [Medical therapy 1] acts by [mechanism of action 1].
  • Response to [medical therapy 1] can be monitored with [test/physical finding/imaging] every [frequency/duration].

Surgery

  • Surgery is the mainstay of therapy for [disease name].
  • [Surgical procedure] in conjunction with [chemotherapy/radiation] is the most common approach to the treatment of [disease name].
  • [Surgical procedure] can only be performed for patients with [disease stage] [disease name].

Prevention

  • There are no primary preventive measures available for [disease name].
  • Effective measures for the primary prevention of [disease name] include [measure1], [measure2], and [measure3].
  • Once diagnosed and successfully treated, patients with [disease name] are followed-up every [duration]. Follow-up testing includes [test 1], [test 2], and [test 3].

Gallery

Extremities

Folliculitis Of Barbae

Folliculitis cheloidalis

Treatment

  1. Topical antiseptic treatment is adequate for most cases
  2. Some patients may benefit from systemic flucloxacillin

References

  1. ↑ Brown M, Hernández-Martín A, Clement A, Colmenero I, Torrelo A (2014). "Severe demodexfolliculorum-associated oculocutaneous rosacea in a girl successfully treated with ivermectin". JAMA Dermatol. 150 (1): 61–3. doi:10.1001/jamadermatol.2013.7688. PMID 24284904.
  2. ↑ Poli F (2012). "Differential diagnosis of facial acne on black skin". Int J Dermatol. 51 Suppl 1: 24–6, 27–9. doi:10.1111/j.1365-4632.2012.05559.x. PMID 23210948.
  3. ↑ Basarab T, Russell Jones R (1996). "HIV-associated eosinophilic folliculitis: case report and review of the literature". Br J Dermatol. 134 (3): 499–503. PMID 8731676.
  4. ↑ Ramdial PK, Morar N, Dlova NC, Aboobaker J (1999). "HIV-associated eosinophilic folliculitis in an infant". Am J Dermatopathol. 21 (3): 241–6. PMID 10380045.
  5. ↑ Hayes BB, Hille RC, Goldberg LJ (2004). "Eosinophilic folliculitis in 2 HIV-positive women". Arch Dermatol. 140 (4): 463–5. doi:10.1001/archderm.140.4.463. PMID 15096375.


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