Absence of tumor infiltrating lymphocytes in primary biopsy and
ulceration are associated with worse progression free survival in early
stage cutaneous melanoma: a single center retrospective analysis
Abstract
Background: Recent data suggest that a subset of early stage melanoma
patients may benefit from adjuvant immunotherapy. Objective: To identify
findings in biopsy or surgical pathology reports associated with poor
prognosis in patients diagnosed with stage I and II cutaneous melanoma.
Methods: This was a retrospective cohort study of 68 stage I and II
cutaneous melanoma patients treated at our institution from 2010 to
2022. Inclusion criteria were patients with stage I or II melanoma with
both a biopsy and surgical pathology report. The primary outcome of the
study was the prognostic value of biopsy findings on progression free
survival (PFS). Kaplan-Meier and Cox-proportional hazards models were
used to evaluate risk factors for progression. Results: Patients with
ulceration on biopsy had a 16.1x greater risk of progression than those
without ulceration [HR 16.1, 95% CI: 2.60-99.5]. Patients with
absent lymphocytes on biopsy had a 9.5x greater risk of progressing
compared to those with lymphocytes present [HR 9.45, 95% CI:
1.99-44.8]. Ulceration or absent TILs were associated with
significantly worse PFS. Conclusions: Ulceration and absence of TILs on
biopsy are associated with increased risk of progression in stage I and
II melanoma patients.