101. Diagnostic Techniques: Other Biopsy Techniques
- Author
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Bertil Damato, Sarah E. Coupland, Armin R. Afshar, Carl Groenewald, and Heinrich Heimann
- Subjects
medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Melanoma ,medicine.medical_treatment ,Forceps ,Vitrectomy ,medicine.disease ,Primary tumor ,eye diseases ,Metastasis ,Biopsy ,Medicine ,Nevus ,sense organs ,Radiology ,Tamponade ,business - Abstract
Alternatives to fine-needle aspiration biopsy include vitreous cutter aspiration biopsy, incisional biopsy, and excisional biopsy. Vitreous cutter aspiration biopsy is performed with a 25- or 27-gauge vitreous cutter using a three-port, sutureless vitrectomy kit, without vitrectomy, retinopexy, or tamponade. Incisional biopsy of choroidal or ciliary body melanomas can be performed with Essen forceps through a deep sclerotomy under a superficial lamellar scleral flap, using tissue glue to close the flap and seal the wound, thereby preventing seeding of tumor cells into surrounding tissues. Excisional biopsy involves removal of the entire tumor, using techniques described elsewhere. Biopsy can be performed to establish a diagnosis (e.g., to differentiate melanoma from nevus or metastasis), or to identify the likely source of a metastasis, when the primary tumor is unknown, or to estimate the survival probability of a patient with uveal melanoma, by performing genetic tumor typing. Close collaboration with the laboratory is essential.
- Published
- 2019
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