Malignant Neoplasms Of Skin – Definitions & ICD 11 Codes

Definition of Malignant Neoplasms Of Skin: A primary or metastatic tumour involving the skin. Primary malignant skin tumours most often are carcinomas (either basal cell or squamous cell carcinomas that arise from cells in the epidermis) or melanomas that arise from pigment-containing skin melanocytes. Metastatic tumours to the skin include carcinomas and lymphomas.

Exclusions:

  • Carcinoma in situ of skin (2E64)
  • Metastatic malignant neoplasm involving skin (2E08)
  • Malignant mesenchymal neoplasms

Melanoma of skin

Definition of Melanoma of skin: A primary melanoma arising from atypical melanocytes in the skin. Precursor lesions include acquired and congenital melanocytic nevi, and dysplastic nevi. Several histologic variants have been recognised, including superficial spreading melanoma, acral lentiginous melanoma, nodular melanoma, and lentigo maligna melanoma.

ICD 11 Code For Melanoma of skin

  2C30  Melanoma of skin

Exclusions:

  • Melanoma of penis (2C81.1)
  • Melanoma of vulva (2C70.1)

2C30.0 Superficial spreading melanoma primary

Definition of Superficial spreading melanoma primary: The commonest form of melanoma, superficial spreading malignant melanoma accounts for about 70 per cent of all melanomas. It characteristically presents as an asymptomatic pigmented cutaneous macule which is asymmetrical in shape and displays variability in both hue and pigment intensity. It has a relatively long phase of progressive superficial extension (radial growth) before penetrating deeper into the dermis and entering an invasive vertical growth phase.

2C30.1 Nodular melanoma primary

Definition of Nodular melanoma primary: Variant of melanoma carrying a poor prognosis due to the fact that there is little or no prodromal radial (superficial) growth phase before deep invasion (vertical growth). The lesion presents as an elevated, reddish, bluish or dark brown coloured, dome- shaped tumour. Ulceration or bleeding from the lesion occurs frequently. It occurs most frequently in the fifth or sixth decade.

2C30.2 Lentigo maligna melanoma primary

Definition of Lentigo maligna melanoma primary: Lentigo maligna malignant melanoma is a form of melanoma which occurs within a lentigo maligna when neoplastic cells no longer remain confined to the epidermis (in situ radial growth) but invade the dermis (vertical growth). The lentigo maligna from which it arises may have been present as an irregularly pigmented macule on sun-exposed skin for many years before dermal invasion supervenes. Clinical differentiation from lentigo maligna may not be possible in the early stages of invasion but as the tumour progresses a focal thickening or nodule within the lentigo maligna will become apparent.

Exclusions:

  • Lentigo maligna (2E63.00)

2C30.3 Acral lentiginous melanoma primary

Definition of Acral lentiginous melanoma primary: Acral lentiginous malignant melanoma is a distinct and uncommon form of melanoma affecting either palmar and plantar skin or the nail apparatus. It is usually preceded by a slowly progressive in situ phase which may be overlooked. It typically presents either as an enlarging area of macular pigmentation on the palms and soles or as a longitudinal pigmented band within the nail plate. More aggressive tumours present as ulcerated nodules which, when involving the nail apparatus, can destroy the nail plate. Acral lentiginous malignant melanoma accounts for a high proportion of melanomas seen in dark-skinned people.

2C30.Y Other specified melanoma of skin

2C30.Z Melanoma of skin unspecified

Definition of Melanoma of skin unspecified: A carcinoma arising from the squamous cells of the epidermis. Skin squamous cell carcinoma is most commonly found on sun-exposed areas. The majority of the tumours are well-differentiated.

Squamous cell carcinoma of skin

ICD 11 Code For Squamous cell carcinoma of skin

  2C31  Squamous cell carcinoma of skin

Coded Elsewhere:

  • Squamous cell carcinoma of penis (2C81.0)

2C31.0 Verrucous squamous cell carcinoma of skin

Definition of Verrucous squamous cell carcinoma of skin: Verrucous squamous cell carcinoma is a rare variant of well-differentiated squamous cell carcinoma with low malignant potential. It occurs principally on the glans and prepuce of the penis and on the sole of the foot.

Exclusions:

  • Verrucous squamous cell carcinoma of vulva (2C70.2)

2C31.Z Cutaneous squamous cell carcinoma

Definition of Cutaneous squamous cell carcinoma: Basal cell carcinoma or BCC is the most common malignancy in humans. It is believed that BCCs arise from pluripotential cells in the basal layer of the epidermis or, less commonly, hair follicle. BCCs typically occur in areas of chronic sun exposure and presents as slowly enlarging reddish papules, plaques or nodules on the head and neck, although the superficial variant is often located on the trunk. BCCs frequently ulcerate and become crusted. Although they rarely metastasize, they can cause significant local destruction and disfigurement if neglected or inadequately treated, particularly if of the sclerosing or infiltrative subtype.

Basal cell carcinoma of skin

ICD 11 Code For Basal cell carcinoma of skin

  2C32  Basal cell carcinoma of skin

2C32.0 Nodular basal cell carcinoma of skin

Definition of Nodular basal cell carcinoma of skin: This is the most common form of basal cell carcinoma and is typically located on the head or neck. It starts as a small translucent nodule which will frequently necrose and ulcerate as it enlarges. Telangiectatic blood vessels can often be detected just under the tumour surface. A minority may be pigmented and give rise to difficulty in distinguishing them from melanoma.

2C32.1 Sclerosing basal cell carcinoma of skin

Definition of Sclerosing basal cell carcinoma of skin: This form of basal cell carcinoma is composed of thin strands, cords and columns of malignant cells which infiltrate between collagen bundles of the dermis. It may infiltrate widely and deeply before it becomes clinically obvious. It typically starts as a pale, poorly-defined indurated plaque which may not come to medical attention until it starts to bleed and crust.

2C32.2 Superficial basal cell carcinoma of skin

Definition of Superficial basal cell carcinoma of skin: Superficial basal cell carcinomas are often multiple and appear as pink or red barely elevated patches varying in size from a few mm to over 10 cm in diameter. A fine pearly border can usually be seen on careful inspection. They occur most frequently on the trunk.

2C32.Y Other specified basal cell carcinoma of skin

2C32.Z Basal cell carcinoma of skin unspecified

Definition of Basal cell carcinoma of skin unspecified: A carcinoma arising from the sebaceous glands, sweat glands, or the hair follicles. Representative examples include sebaceous carcinoma, apocrine carcinoma, eccrine carcinoma, and pilomatrical carcinoma.

Adnexal carcinoma of skin

ICD 11 Code For Adnexal carcinoma of skin

  2C33  Adnexal carcinoma of skin

Inclusions:

  • Primary cutaneous mucinous carcinoma
  • Primary cutaneous adenoid cystic carcinoma
  • Appendageal carcinoma of skin

Cutaneous neuroendocrine carcinoma

Definition of Cutaneous neuroendocrine carcinoma: Cutaneous neuroendocrine carcinoma is a primary cutaneous cancer arising from a subset of skin neuroendocrine cells (Merkel cells, giving the name Merkel cell carcinoma (MCC)).

ICD 11 Code For Cutaneous neuroendocrine carcinoma

  2C34  Cutaneous neuroendocrine carcinoma

Cutaneous sarcoma

Definition of Cutaneous sarcoma: A group of generally rare malignant neoplasms arising from mesenchymal elements in the dermis including fibroblasts, pilar smooth muscle and vascular endothelium.

ICD 11 Code For Cutaneous sarcoma

  2C35  Cutaneous sarcoma

Coded Elsewhere:

  • Angiosarcoma of skin (2B56.1)
  • Kaposi sarcoma of skin (2B57.1)
  • Cutaneous leiomyosarcoma (2B58.Y)
  • Dermatofibrosarcoma protuberans (2B53.Y)

Other specified malignant neoplasms of skin

ICD 11 Code For Other specified malignant neoplasms of skin

  2C3Y  Other specified malignant neoplasms of skin

Malignant neoplasm of skin of unknown or unspecified type

ICD 11 Code For Malignant neoplasm of skin of unknown or unspecified type

  2C3Z  Malignant neoplasm of skin of unknown or unspecified type

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