Simple Lymphadenectomy: Definition & What It Entails

A simple lymphadenectomy (also called lymphadenectomy alone) is a surgical procedure in which only lymph nodes are removed from a specific anatomic region, without resection of adjacent non-lymphatic structures (e.g., muscles, nerves, vessels, organs).

Contrast with Other Dissections

Procedure	Structures Removed	Typical Indication
Simple lymphadenectomy	Lymph nodes only (with surrounding fatty tissue)	Staging, diagnostic biopsy, low-burden metastasis
Modified radical neck dissection	Levels I-V nodes + SCM, IJV, CN XI (one or two spared)	Head & neck cancer with nodal involvement
Radical neck dissection	Levels I-V nodes + SCM, IJV, CN XI (all removed)	Advanced nodal disease
Pelvic lymphadenectomy	Pelvic nodes ± common iliac	Prostate, bladder, cervical, endometrial cancer staging
Inguinal lymphadenectomy	Superficial & deep inguinal nodes	Melanoma, penile, vulvar cancer

Key Features of Simple Lymphadenectomy

• Purpose: Diagnostic (staging), therapeutic (micrometastases), or palliative.
• Extent: Defined anatomic boundaries (e.g., sentinel node biopsy, selective neck dissection levels I-III).
• Preservation: Nerves, vessels, muscles intentionally spared.
• Morbidity: Lower than radical dissections—less lymphedema, nerve injury, shoulder dysfunction.

Common Applications

• Sentinel lymph node biopsy (SLNB) — melanoma, breast cancer
• Selective neck dissection (levels I-III) — early oral cavity cancer
• Pelvic lymph node dissection — prostate/endometrial cancer staging
• Retroperitoneal lymph node dissection (RPLND) — testicular cancer (modified template)

Postoperative Considerations

• Drain placement (prevent seroma/lymphocele)
• Early mobilization, compression garments (lower extremity)
• Lymphedema risk: low with limited dissection; higher with axillary/inguinal completion.