Medical Glossary
Definitions and explanations of medical terms related to minimally invasive surgery and filler repair.
Medically Reviewed by Dr. Ta-Ju Liu (Dermatology Specialist) | Last Reviewed: 2026-03-15
- Apocrine Gland
- A type of sweat gland found in the axillary, areolar, and perineal regions. Its secretions, when broken down by skin bacteria, produce characteristic body odor (bromhidrosis).
- Capsule
- A fibrous tissue layer formed by the body around foreign materials (fillers, fat grafts). Acts as a barrier that blocks enzymatic dissolvers, requiring physical surgical removal.
- Capsulectomy
- Surgical removal of the fibrous capsule that encases a tumor or foreign body. Complete capsulectomy is essential to prevent recurrence in lipoma and cyst removal.
- CO2 Laser Micro-Hole Extraction
- A technique using CO2 laser to create a precise micro-hole in the skin for extracting epidermal cysts, offering minimal scarring and faster healing than scalpel incisions.
- Collagen Stimulator
- Injectable biomaterials (such as Sculptra, Ellansé, Radiesse) that stimulate the body's collagen production. Complications include nodule formation and granulomas that cannot be dissolved enzymatically.
- Epidermal Cyst
- The most common benign skin tumor, consisting of a keratin-filled sac with a complete capsule wall. Also known as sebaceous cyst. Complete capsule removal is required to prevent recurrence.
- Facial Overfilled Syndrome (FOS)
- A condition caused by excessive dermal filler injection, resulting in unnatural facial contours, loss of expression, and a "pillow face" appearance. Requires surgical removal for correction.
- Granuloma
- A foreign body reaction where the immune system forms nodules of inflammatory cells around injected materials such as dermal fillers or fat grafts.
- Hyaluronidase
- An enzyme used to dissolve hyaluronic acid fillers. Effective for fresh HA filler complications but cannot penetrate hardened capsules around chronic filler lumps.
- Lipoma
- A benign soft tissue tumor composed of mature fat cells, the most common soft tissue tumor in adults. Requires complete capsule (capsulectomy) removal to prevent recurrence.
- Pinhole Extraction
- An ultra-minimally invasive technique using a needle-hole-sized incision to physically extract encapsulated filler complications, granulomas, and calcified lumps without scarring.
- Rotational Curettage
- A minimally invasive technique using a rotating blade probe to thoroughly remove apocrine glands through a 4mm incision, achieving over 99% gland clearance rate for bromhidrosis treatment.
- Tumescent Anesthesia
- A local anesthesia technique that infuses diluted lidocaine with epinephrine into subcutaneous tissue, providing prolonged anesthesia, hemostasis, and tissue hydrodissection for minimally invasive surgery.
- Ultrasound-Guided
- A technique using real-time ultrasound imaging to precisely locate tumors, filler lumps, or foreign bodies before and during minimally invasive extraction procedures.
- Vascular Occlusion
- A serious complication of filler injection where the injected material blocks blood vessels, potentially causing tissue necrosis or blindness. Requires emergency treatment.