Multicenter Selective Lymphadenectomy Trial (MSLT)

Phase 3

Completed

• Conditions: Melanoma
• Interventions: Procedure: Sentinel Lymph Node Dissection; Procedure: Wide Excision; Procedure: Complete Lymph Node Dissection

• Registration Number: NCT00275496
• Lead Sponsor: Saint John's Cancer Institute

Brief Summary

Subjects must be diagnosed with melanoma. All subjects receive Wide Excision (WEX) of their melanoma. If the melanoma meets study requirements, the subject is randomized to receive either (1) no further surgical procedures as part of the study or (2) a Selective Lymphadenectomy with the possibility of a Complete Lymphadenectomy. Subjects are then followed for 10 years.

Detailed Description

Not available

Study Timeline

• Study Start: 1993-11
• Study First Submitted: 2006-01-10
• Study First Submitted QC: 2006-01-10
• Study First Posted: 2006-01-12
• Primary Completion: 2012-06
• Study Completion: 2012-06
• Status Verified: 2014-05
• Last Update Submitted: 2015-09-01
• Last Update Posted: 2015-09-02

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 2001

Inclusion Criteria

1. The patient consents to be in the study.
2. The patient must have invasive melanoma with: 1) Clark Level III and Breslow Thickness greater than or equal to 1.00 mm; or 2) Clark Level IV or V with any Breslow thickness. A confirmation of diagnosis and thickness must be made by the institutional pathologist.
3. The primary cutaneous melanoma site must be on the head, neck, trunk, extremity, scalp, palm of the hand, sole of the foot, or subungual skin.
4. The patient's biopsy must have been completed no more than 10 weeks before the initial visit to the clinic. (Surgery must be scheduled within three months of the biopsy.)
5. The patient must be between 18 and 75 years old.
6. The patient must have a life expectancy of at least 10 years from the time of diagnosis, excluding the diagnosis of melanoma.

Exclusion Criteria

1. The patient had a prior wide excision of the primary with a diameter of excision greater than or equal to 3.0 cm and the shortest margin from the tumor edge to the excision edge was measured by a pathologist to be greater than or equal to 1.5 cm; or the patient had an elliptical excision and a margin beyond the tumor edge was greater than or equal to 1.5 cm at the narrowest margin.
2. The primary cutaneous melanoma involves the eye, ear, mucous membranes.
3. The patient has clinical evidence of satellite lesions, in-transit, regional nodal or distant metastases.
4. The patient has a second primary invasive melanoma.
5. The patient has had any type of solid tumor or hematologic malignancy during the past 5 years. Exceptions are if the patient has been treated for T1 lesions (e.g., squamous cell carcinoma of the skin, basal cell carcinoma or in situ carcinoma of the uterine cervix) during the past 5 years, but has not received treatment within the last 6 months.
6. The patient has had prior skin grafts, tissue transfers or flaps, or lymph node dissections that may alter the lymphatic drainage pattern from a primary cutaneous melanoma to the adjacent regional lymph node basins.
7. The patient has had previous chemotherapy, immunotherapy or radiation therapy.
8. The patient has had an organ transplantation and is receiving immunosuppressive agents as a result of the transplantation.
9. The patient has taken oral or parenteral steroids or immunosuppressive drugs within the last 6 months.
10. The patient has any known primary or secondary immune deficiencies.
11. The patient has another medical condition that will affect life expectancy.
12. The patient is pregnant.
13. Evidence that the patient cannot undergo selective lymph node dissection for any reason.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
WEX + SLND	Sentinel Lymph Node Dissection	-
WEX only	Wide Excision	-
WEX+SLND+CLND	Complete Lymph Node Dissection	-

Primary Outcome Measures

Name	Time	Method
To determine whether wide excision of the primary with intraoperative lymphatic mapping (LM) followed by selective lymphadenectomy will effectively prolong overall survival compared to wide excision of the primary melanoma alone.	10 years

Secondary Outcome Measures

Name	Time	Method
Disease-free survival; Incidence, timing, and anatomic distribution of distant metastases; Morbidity of procedures; Significance of TA90 levels; Incidence of Sentinel Node Metastases (biopsy) vs clinical metastases (observation); Accuracy of LM	10 years