Basal Cell Carcinoma
Article summary goes here.
- 1 Disease Entity
- 2 Diagnosis
- 3 Management
- 4 Additional Resources
- 5 References
Disease Entity[edit | edit source]
International Classification of Disease (ICD)
ICD-9-CM 173.00 Basal Cell Carcinoma ICD-10-CM C44 Basal Cell Carcinoma
BCC is a malignant epidermal carcinoma. BCC is the most common eyelid malignancy, accounting for over 90% of malignant eyelid neoplasms.
Etiology[edit | edit source]
Ultraviolet light induced damage to the epidermis.
Risk Factors[edit | edit source]
BCC tends to occur in lightly pigmented individuals at sites of sun exposure.
Other risk factors include:
- Previous scar
- Inherited syndromes, e.g., xeroderma pigmentosum
General Pathology[edit | edit source]
As its names implies, BCC derives from cells of the epithelial basal cell layer. Histologically the tumor has an appearance similar to the normal epithelial basal cell layer (Figure 1). BCC forms strands, cords, and islands of tumor. Palisading of the nuclei at the periphery of the islands of tumor is characteristic (Figure 1). An additional distinguishing feature of the tumor is the clefts or separation artifact, which results from tissue processing. Both nodular and morpheaform tumor growth types are seen in the periocular region.
The morpheaform type, also known as sclerosing or fibrosing type, characteristically has small islands of tumor within dense fibrous tissue (Figure 2). The nests and strands of tumor tend to invade the underlying tissue more deeply. The more aggressive pattern of the morpheaform type presents a challenge in determining the extent of the tumor; the variant carries a higher rate of recurrence.
Pathophysiology[edit | edit source]
Defects of the PTCH gene located on chromosome 9q22.3 have been associated with the development of BCC.
Primary prevention[edit | edit source]
Minimize sun exposure by use of sun block products, as well as hats and appropriate clothing.
Diagnosis[edit | edit source]
The diagnosis of BCC can be suspected clinically and is confirmed histologically.
History[edit | edit source]
The history for any suspicious periocular mass lesion should include assessment for any of the risk factors for BCC. The location of the lesion is noteworthy. Due to a relatively greater amount of sun exposure, BCC has a predilection for the lower eyelid, followed by the medial canthus.
Physical examination[edit | edit source]
Complete eye examination, including ocular motility and assessment of proptosis
Assessment of facial sensation
Examination of the lesion includes assessment for:
- General appearance and extent of the lesion and periocular skin
- Distortion of eyelid architecture or eyelid malposition
- Presence of skin ulceration
- Madarosis (loss of eyelashes)
Symptoms[edit | edit source]
- May be asymptomatic
- Ulceration and Bleeding
- Non-healing skin lesion
- Skin crusting
- Parethesia or anesthesia
- Eyelash loss
Diagnostic procedures[edit | edit source]
Differential diagnosis[edit | edit source]
The differential diagnosis includes any benign or malignant condition of the eyelid skin, including:
- Seborrheic keratosis
- Actinic keratosis
- Squamous papilloma
- Squamous cell carcinoma
- Sebaceous gland carcinoma
- Malignant melanoma
- Merkel cell tumor
Management[edit | edit source]
BCC is nearly always a locally invasive disease. Treatment is recommended to prevent damage to neighboring tissues.
Medical therapy[edit | edit source]
Treatment with topical imiquimod 5% cream has been shown to be effective, although not as effective as surgical excision, in several case series. More aggressive BCC has also been successfully treated with medication that targets the sonic hedgehog pathway. Further studies are needed to evaluate the extent of histopathologic resolution or changes from vismodegib. 
Surgery[edit | edit source]
Complete surgical excision with margin control. Assuring that the surgical margins are without cancerous cells may be accomplished by frozen sectioning or Mohs surgery.
Complications[edit | edit source]
Recurrence of the tumor.
Prognosis[edit | edit source]
Five-year cure rates of up to 98% have been reported for BCC. There is a worse prognosis with:
- Lesions greater than 3 cm
- Long-standing lesions
- Deeply invasive tumors
- Inadequate treatment
Additional Resources[edit | edit source]
References[edit | edit source]
Ophthalmic Pathology and Intraocular Tumors, Section 4. Basic and Clinical Science Course. San Francisco: American Academy of Ophthalmology; 2009.
Orbit, Eyelids, and Lacrimal System, Section 7. Basic and Clinical Science Course. San Francisco: American Academy of Ophthalmology; 2009.
Sehu KW, Lee WR. Ophthalmic Pathology. Oxford: Blackwell Publishing, 2005: 25, 27-30.
Srivastava M, Kelley L. Mohs' Surgery for Eyelid Malignancies. In: Albert DM, Jakobiec FA, eds. Principles and Practice of Ophthalmology, 3rd ed. Philadelphia: W.B. Saunders, 2008;3:248.
Valenzuela AA, Sullivan TJ. Basal Cell Carcinoma in the Eyelid. In: Albert DM, Jakobiec FA, eds. Principles and Practice of Ophthalmology, 3rd ed. Philadelphia: W.B. Saunders, 2008;3:249.Yanoff M, Sassani JW. Ocular Pathology, 6th ed. Philadelphia: Mosby Elsevier, 2009: 197-199.
- Cook BE Jr., Bartley GB. Epidemiologic characteristics and clinical course of patients with malignant eyelid tumors in an incidence cohort in Olmsted County, Minnesota. Ophthalmology. 1999 Apr;106(4):746-50.
- Beutner KR1, Geisse JK, Helman D, Fox TL, Ginkel A, Owens ML. Therapeutic response of basal cell carcinoma to the immune response modifier imiquimod 5% cream. J Am Acad Dermatol. 1999 Dec;41(6):1002-7.
- Gill HS, Moscato EE, Chang AL, Soon S, Silkiss RZ. Vismodegib for periocular and orbital basal cell carcinoma. JAMA Ophthalmol. 2013 Dec;131(12):1591-4. doi: 10.1001/jamaophthalmol.2013.5018.