Among the tested clinicopathological parameters, “age over 60 years,” “postmenopausal state,” “presence of lymph node metastasis,” “negativity for oestrogen receptor (ER)” and “negativity for progesterone receptor (PgR)” were positively associated with PI(18:0/20:3) accumulation (Table 1). Here, PGR is linked to metastatic malignant neoplasm in the lymph nodes.