Laura Salama, MD Profile picture
Nov 9 20 tweets 130 min read
@TumorBoardTues @DrSGraff @CharlesMilrod 1/18 #TumorBoardTuesday #OncTwitter

44 yo👩🏾
Stage 1 triple neg #BreastCancer #TNBC
✂️right lumpectomy
adj ACx4
radiation ☢️

8⃣🗓️months later
New R breast mass, ⬆️fatigue x3 mos
🩻CT many small 🫁 nodules & 4cm liver mass
🔬Breast & Liver ➡️ breast ca ER0% PR0% HER2 1+
Now?
@TumorBoardTues @DrSGraff @CharlesMilrod 2/18 #TumorBoardTuesday
Closer look at the biopsies:

🔬Breast: Invasive Ductal Carcinoma w/dense lymphocytic infiltrate, G3, ER 0% PR 0% HER2 1+
🔬Liver: met carcinoma c/w breast primary, ER staining absent

❓What additional testing?

🤨Would it differ with ER+ #BreastCancer?
@TumorBoardTues @DrSGraff @CharlesMilrod 3/18 #TumorBoardTuesday #BreastCancer

📌For metastatic #TNBC

📍Germline BRCA1/2 (gBRCApv) and PD-L1 are 🔑 in early decision making📍

🤔What if she were 3L or beyond?

❓What factors–clinical, genomic–impact decisions?
@TumorBoardTues @DrSGraff @CharlesMilrod 4/18 #TumorBoardTuesday
👩‍👩‍👦 Mini tweetorial 1

📌Role of local therapy in MBC

There are 4️⃣trials shown here:
3⃣:🚫benefit ✂️surgery
1⃣:⬇️QoL with ✂️surgery

🧐 Only favorable study? Required responding ds, unbalanced arms 🤨

📍For us, surgery in MBC = "almost never"
@TumorBoardTues @DrSGraff @CharlesMilrod @drsadafch @NicoleKuderer @KiranManjee @LuisBlancoJrMD @LurieCancer @NagiSaghir @hmcarthur 5/18 #TumorBoardTuesday #BreastCancer
👩‍👩‍👦 Mini tweetorial 2

📌Additional testing!

With a new or suspected diagnosis of mTNBC:

2️⃣🔑tests:
🫧PD-L1
🫧germline BRCA status

📍These 2 🧩 are the foundation for the algorithm that’ll build🔨 your road map🗺️ through treatment!📍
@TumorBoardTues @DrSGraff @CharlesMilrod @drsadafch @NicoleKuderer @KiranManjee @LuisBlancoJrMD @LurieCancer @NagiSaghir @hmcarthur @DrLauraEsserman @tmprowell @genperisi @RitaNandaMD @drteplinsky @nicholasklemen @ErikaHamilton9 @hoperugo @naborala @DrHBurstein 6/18 #TumorBoardTuesday
👩‍👩‍👦 Mini tweetorial 3

We know ✨KEYNOTE-355 @JavierCortesMD @NEJM showed patients with mTNBC got the most bang 💥 with pembrolizumab with CPS≥10 (those others groups are 👎!)

📚nejm.org/doi/full/10.10…
@TumorBoardTues @DrSGraff @CharlesMilrod @drsadafch @NicoleKuderer @KiranManjee @LuisBlancoJrMD @LurieCancer @NagiSaghir @hmcarthur @DrLauraEsserman @tmprowell @genperisi @RitaNandaMD @drteplinsky @nicholasklemen @ErikaHamilton9 @hoperugo @naborala @DrHBurstein @JavierCortesMD @NEJM @Dr_Ivanoncologo @Nicole_O_W @donnashort @nlinmd @elmayermd @barrosolab 7/18 #TumorBoardTuesday
👩‍👩‍👦 Mini tweetorial 4

But is CPS≥10 the best marker? 🤷‍♀️

In early-TNBC,🚫 PDL1/CPS should NOT drive decision making!
⚡️All TNBC benefit⚡️
🔮In early TNBC ⬆️ Tumor-infiltrating lymphocytes (TILS) strongly correlate with DFS!
📚ascopubs.org/doi/10.1200/JC…
@TumorBoardTues @DrSGraff @CharlesMilrod @drsadafch @NicoleKuderer @KiranManjee @LuisBlancoJrMD @LurieCancer @NagiSaghir @hmcarthur @DrLauraEsserman @tmprowell @genperisi @RitaNandaMD @drteplinsky @nicholasklemen @ErikaHamilton9 @hoperugo @naborala @DrHBurstein @JavierCortesMD @NEJM @Dr_Ivanoncologo @Nicole_O_W @donnashort @nlinmd @elmayermd @barrosolab @JCO_ASCO @JaniceTNBCmets @MridulaGeorgeMD 8/18 #TumorBoardTuesday
👩‍👩‍👦Mini tweetorial 5

🤔Will PDL1 be🎯for our 👩🏾?

📍PDL1 expressed ~50% of breast ca, esp TNBC & high grade tumors
🤯but 0% normal breast tissue!

💡CPS is critical‼️🟰 PDL1+ tumor cells, lymphs, macrophages ➗tumor cells x100

⬆️immune cells🟰⬆️CPS!
@TumorBoardTues @DrSGraff @CharlesMilrod @drsadafch @NicoleKuderer @KiranManjee @LuisBlancoJrMD @LurieCancer @NagiSaghir @hmcarthur @DrLauraEsserman @tmprowell @genperisi @RitaNandaMD @drteplinsky @nicholasklemen @ErikaHamilton9 @hoperugo @naborala @DrHBurstein @JavierCortesMD @NEJM @Dr_Ivanoncologo @Nicole_O_W @donnashort @nlinmd @elmayermd @barrosolab @JCO_ASCO @JaniceTNBCmets @MridulaGeorgeMD @ArielleMedford @dradityabardia 10/18 #TumorBoardTuesday #BCSM
👩‍👩‍👦 Mini tweetorial 7

💫Recap💫

MBC: No breast surgery 🚫✂️
mTNBC Step 1 🟰
🧬germline BRCA testing
🔬tumor testing for PD-L1 CPS

Driving first line treatment decision:
🔹Pembro + Chemo
🔹PARP inhibitor
🔹Chemo alone
@TumorBoardTues @DrSGraff @CharlesMilrod @drsadafch @NicoleKuderer @KiranManjee @LuisBlancoJrMD @LurieCancer @NagiSaghir @hmcarthur @DrLauraEsserman @tmprowell @genperisi @RitaNandaMD @drteplinsky @nicholasklemen @ErikaHamilton9 @hoperugo @naborala @DrHBurstein @JavierCortesMD @NEJM @Dr_Ivanoncologo @Nicole_O_W @donnashort @nlinmd @elmayermd @barrosolab @JCO_ASCO @JaniceTNBCmets @MridulaGeorgeMD @ArielleMedford @dradityabardia 11/18 #TumorBoardTuesday
Back to our case🔎

Our 👩🏾patient’s results:
🧪 gBRCA wild-type and PD-L1 CPS≥10
👩🏾started pembrolizumab + chemo & had partial response

🩻After being on treatment for 8 months, disease demonstrated progression☹️

🤔What might we need to know now?❓🔬
@TumorBoardTues @DrSGraff @CharlesMilrod @drsadafch @NicoleKuderer @KiranManjee @LuisBlancoJrMD @LurieCancer @NagiSaghir @hmcarthur @DrLauraEsserman @tmprowell @genperisi @RitaNandaMD @drteplinsky @nicholasklemen @ErikaHamilton9 @hoperugo @naborala @DrHBurstein @JavierCortesMD @NEJM @Dr_Ivanoncologo @Nicole_O_W @donnashort @nlinmd @elmayermd @barrosolab @JCO_ASCO @JaniceTNBCmets @MridulaGeorgeMD @ArielleMedford @dradityabardia 12/18 #TumorBoardTuesday #BCSM

🌟We are now in the realm of ADCs!

Because our 👩🏾 was:
🧬gBRCA wild type
🔬Her2 1+

🔥#ProTip
👉🏽This is when I would send off genomic profiling if I hadn’t already. Then I have it. If I have a 🦄, I am ready to consider those agents in 3rd Line

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