Sporotrichosis classification

Jump to navigation Jump to search

Sporotrichosis Microchapters

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Sporotrichosis from other Diseases

Epidemiology and Demographics

Risk Factors

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms

Physical Examination

Laboratory Findings

Chest X Ray

Treatment

Medical Therapy

Surgery

Prevention

Case Studies

Case #1

Sporotrichosis classification On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Sporotrichosis classification

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Sporotrichosis classification

CDC on Sporotrichosis classification

Sporotrichosis classification in the news

Blogs on Sporotrichosis classification

Directions to Hospitals Treating Sporotrichosis

Risk calculators and risk factors for Sporotrichosis classification

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Alison Leibowitz [2]

Overview

Sporotrichosis may be classified, according to the location of the lesions, into particular subtypes: fixed cutaneous, lymphocutaneous, disseminated cutaneous, and extracutaneous/systemic. These subtypes may be further separated into increasingly specific forms based upon clinical manifestations.

Classification

  • Presentations vary based upon numerous factors, such as the patient’s immunological status, the severity and depth of the inoculum, and the particular strain’s thermal zone of tolerance and pathogenicity.

Cutaneous Forms

Cutaneous forms of Sporotrichosis typically manifest following minor epidermal trauma. Patients may present with multiple forms of cutaneous lesions.

Fixed form:

  • Staying localized within the subcutaneous tissue, the fungus transforms into its yeast form.
  • Manifests at the site of inoculation with at least one, frequently ulcerated, lesion
  • The lesions are characterized by red edges due to capillary dilation and congestion.
  • Fixed form sporotrichosis may spontaneously regress [1]
  • Fixed form sporotrichosis is the main clinical presentation in child patients.
  • Initially manifests as painless nodules, which then become palpable, purulent, and ulcerated

Lymphocutaneous form:

  • The yeast form of S. schenckii extends through the nearby lymphatic vessels.[2]
  • Approximately 70% of the cases of sporotrichosis may be classified as lymphocutaneous sporotrichosis.[3]
  • The primary lesion frequently manifests on the upper extremities and is initially painless.
  • Initially a patient will present with a papule or pustule, which later expands into a subcutaneous nodule.[3]
  • Subepidermal pressure results in ischemia, and the lesion evolves into a palpable, purulent, and ulcerated nodule.
  • Secondary lesions manifest along the adjacent lymphatic pathway.[4]
  • The presence of systemic symptoms is rare.

Disseminated cutaneous form:

  • Manifests upon the hematogenous dissemination of the yeast form of S. schenckii
  • Not associated with extracutaneous involvement
  • Characterized by greater than or equal to three epidermal lesions, which form on at least two noncontiguous sites on the body

Mucosal Form:

  • Typically manifests with enlargement of the submandibular and preauricular (anterior to ear tragus) lymph nodes
  • Nasal mucosa is a variant of mucosal form sporotrichosis, which frequently involves septum lesions characterized by bloody discharge and crustal detachment.[4]

Extracutaneous/Systemic Sporotrichosis

The extracutaneous forms of sporotrichosis are more likely to manifest following the onset of AIDS. These forms are uncommon and difficult to diagnose, but are almost always associated with immunological impairment[4]

Osteoarticular form:

  • Most common extracutaneous form of sporotrichosis
  • Cutaneous lesions rarely manifest in cases of osteoarticular sporotrichosis.
  • Usually starts as monoarticular disease without systemic illness
  • May manifest by contiguity or hematogenous spread[4]
  • Characterized by the involvement of bones and joints
  • Usually affects joints in the knee, wrist, elbow, and ankle
  • May manifest with tenosynovitis or bursitis[5]
  • Frequently associated with arthritis
    • In these cases of coexisting diagnoses, lesions typically manifest along bones adjacent to affected joints. [6]

Primary pulmonary form:

Disseminated form:

  • Characterized by the involvement of at least two sites in the body
  • Manifests as a result of hematogenic dissemination of S. schenckii, resulting in multifocal or widespread infection
  • May initially manifest as another form of extracutaneous sporotrichosis
  • Strongly associated with immunodeficiency

Other rare forms of sporotrichosis:

  • endophthalmitis
  • chorioretinitis

References

  1. Saha A, De A, Datta P, Das N. Fixed cutaneous sporotrichosis: a diagnostic challenge overcome by incidental discovery of asteroid bodies S. Journal of Pakistan Association of Dermatologists. 2010;(20):120-122.>
  2. Stalkup J. R., Bell K., Rosen T.. 2002. Disseminated cutaneous sporotrichosis treated with itraconazole. Cutis 69:371–374.>
  3. 3.0 3.1 Goncalves AP. Sporotrichosis. In: Canizares O, Harman R, editors. Clinical Tropical Dermatology, 2nd edn. Philadelphia: Blackwell Scientific Publications; 1992. p. 88-93.>
  4. 4.0 4.1 4.2 4.3 4.4 Mahajan VK (2014). "Sporotrichosis: an overview and therapeutic options". Dermatol Res Pract. 2014: 272376. doi:10.1155/2014/272376. PMC 4295339. PMID 25614735.
  5. Kauffman CA, Bustamante B, Chapman SW, Pappas PG, Infectious Diseases Society of America (2007). "Clinical practice guidelines for the management of sporotrichosis: 2007 update by the Infectious Diseases Society of America". Clin Infect Dis. 45 (10): 1255–65. doi:10.1086/522765. PMID 17968818.
  6. Ellis D. Mycology Online | Sporotrichosis. Mycologyadelaideeduau. 2016. Available at: http://www.mycology.adelaide.edu.au/Mycoses/Subcutaneous/Sporotrichosis/. Accessed January 8, 2016.>