Amelanotic melanoma

Amelanotic melanoma on the back

Amelanotic melanoma is a type of skin cancer in which the cells do not make any melanin.[1]: 696 [2] They can be pink, red, purple or of normal skin color, and are therefore difficult to diagnose correctly. They can occur anywhere on the body, just as a typical melanoma can.

Often, amelanotic melanomas are mistaken for benign lesions, including dermatitis, benign neoplastic processes, or a different malignancy such as basal-cell carcinoma or squamous-cell carcinoma.[3] A poor prognosis is associated with amelanotic lesions, partially due to the difficulty in achieving a diagnosis; however, metastatic amelanotic melanoma has a worse prognosis than other subtypes.[3]

Survival after diagnosis of amelanotic melanoma was found in a 2014 seven-year study of 3,000 patients to be poorer than for pigmented melanoma, which was attributed to the more advanced stage at diagnosis due probably to difficulty of diagnosis. The study also suggested that amelanotic melanomas might grow faster than pigmented melanomas.[4]

## Contents

* 1 Signs and symptoms
* 2 See also
* 3 References
* 4 External links

## Signs and symptoms[edit | edit source]

* Amelanotic melanoma (Dermoscopic image)

* Amelanotic melanoma on the back

* Amelanotic melanoma

* Amelanotic nodular melanoma

* Amelanotic superficial spreading melanoma in situ

* Amelanotic Lentigo Maligna And Melanoma

## See also[edit | edit source]

* Melanoma
* List of cutaneous conditions

## References[edit | edit source]

1. ↑ James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 978-0-7216-2921-6.
2. ↑ Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. ISBN 978-1-4160-2999-1.
3. ↑ 3.0 3.1 Cabrera, Raúl; Recule, Francisca (2018). "Unusual Clinical Presentations of Malignant Melanoma: A Review of Clinical and Histologic Features with Special Emphasis on Dermatoscopic Findings". American Journal of Clinical Dermatology. 19 (Suppl 1): 15–23. doi:10.1007/s40257-018-0373-6. ISSN 1175-0561. PMC 6244635. PMID 30374898.
4. ↑ Thomas, Nancy E.; Kricker, Anne; Waxweiler, Weston T.; et al. (2014). "Comparison of Clinicopathologic Features and Survival of Histopathologically Amelanotic and Pigmented Melanomas". JAMA Dermatology. 150 (12): 1306. doi:10.1001/jamadermatol.2014.1348. ISSN 2168-6068. PMC 4262611.

## External links[edit | edit source]

Classification|

* ICD-10: C43 ILDS C43.L50)
* SNOMED CT: 70594002

|

* Amelanotic melanoma Archived 2015-04-25 at the Wayback Machine entry in the public domain NCI Dictionary of Cancer Terms

This article incorporates public domain material from the U.S. National Cancer Institute document: "Dictionary of Cancer Terms".

* v
* t
* e

Skin cancer of nevi and melanomas

Melanoma|

* Mucosal melanoma
* Superficial spreading melanoma
* Nodular melanoma
* lentigo
* Lentigo maligna/Lentigo maligna melanoma
* Acral lentiginous melanoma
* Amelanotic melanoma
* Desmoplastic melanoma
* Melanoma with features of a Spitz nevus
* Melanoma with small nevus-like cells
* Polypoid melanoma
* Nevoid melanoma
* Melanocytic tumors of uncertain malignant potential

Nevus/
melanocytic nevus|

* Nevus of Ito/Nevus of Ota
* Spitz nevus
* Pigmented spindle cell nevus
* Halo nevus
* Pseudomelanoma

* Blue nevus
* of Jadassohn–Tièche
* Cellular
* Epithelioid
* Deep penetrating
* Amelanotic
* Malignant

* Congenital melanocytic nevus (Giant
* Medium-sized
* Small-sized)

* Balloon cell nevus
* Dysplastic nevus/Dysplastic nevus syndrome

* Acral nevus
* Becker's nevus
* Benign melanocytic nevus
* Nevus spilus

*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template