diff --git a/code/datums/diseases/advance/presets.dm b/code/datums/diseases/advance/presets.dm
index 331364403e32..cf261da1df10 100644
--- a/code/datums/diseases/advance/presets.dm
+++ b/code/datums/diseases/advance/presets.dm
@@ -24,6 +24,15 @@
 	symptoms = list(new/datum/symptom/necroseed)
 	..()
 
+/datum/disease/advance/tumor
+	copy_type = /datum/disease/advance
+
+/datum/disease/advance/tumor/New()
+	name = "Tumors"
+	symptoms = list(new/datum/symptom/tumor,new/datum/symptom/sneeze,new/datum/symptom/fever,new/datum/symptom/shivering,new/datum/symptom/itching,new/datum/symptom/cough)
+	..()
+
+
 //Randomly generated Disease, for virus crates and events
 /datum/disease/advance/random
 	name = "Experimental Disease"
diff --git a/code/datums/diseases/advance/symptoms/tumors.dm b/code/datums/diseases/advance/symptoms/tumors.dm
new file mode 100644
index 000000000000..08b8056bcc55
--- /dev/null
+++ b/code/datums/diseases/advance/symptoms/tumors.dm
@@ -0,0 +1,112 @@
+//benign, premalignant, malignant tumors
+
+/datum/symptom/tumor
+	name = "Benign tumors"
+	desc = "The virus causes benign growths all over your body."
+	stealth = 0
+	resistance = 4
+	stage_speed = -4
+	transmittable = -4
+	level = 3
+	severity = 2
+	symptom_delay_min = 5
+	symptom_delay_max = 35
+	threshold_descs = list(
+		"Transmission 7" = "Gives visible growths on the host's body, eventually preventing some clothes from being worn.",
+		"Stealth 4" = "Regenerates limbs that are incredibly fragile.",
+		"Resistance 8" = "Heals brute and burn damage in exchange for toxin damage."
+	)
+	var/regeneration = FALSE
+	var/helpful = FALSE
+	var/tumor_chance = 0.5
+	var/obj/item/organ/tumor/tumortype = /obj/item/organ/tumor
+	var/datum/disease/advance/ownerdisease //what disease it comes from
+
+/datum/symptom/tumor/Start(datum/disease/advance/A)
+	. = ..()
+	if(!.)
+		return
+	ownerdisease = A;
+	if(A.totalTransmittable() >= 7) //visible growths
+		if(ishuman(A.affected_mob))
+			A.affected_mob.visible_tumors = TRUE
+	if(A.totalStealth() >= 4) //regeneration of limbs
+		regeneration = TRUE
+	if(A.totalResistance() >= 8) //helpful healing instead of just toxin
+		helpful = TRUE
+
+/datum/symptom/tumor/Activate(datum/disease/advance/A)
+	. = ..()
+
+	if(!.)
+		return
+	var/mob/living/carbon/human/M = A.affected_mob
+	if(!M) 
+		return
+
+	if(M.visible_tumors)
+		//clothes wearing
+		if(A.stage > 2)
+			var/datum/species/S = M.dna?.species
+			if(S)
+				S.add_no_equip_slot(M, SLOT_WEAR_MASK)
+				S.add_no_equip_slot(M, SLOT_HEAD)
+
+		if(A.stage == 5)
+			var/datum/species/S = M.dna?.species
+			if(S)
+				S.add_no_equip_slot(M, SLOT_WEAR_SUIT)
+
+	//spreading
+	if(prob(tumor_chance)) //2% chance to make a new tumor somewhere
+		spread(M)
+
+/datum/symptom/tumor/proc/spread(mob/living/carbon/human/M, from_tumor = FALSE)
+	if(!M)
+		return
+	var/list/possibleZones = list(BODY_ZONE_HEAD,BODY_ZONE_CHEST,BODY_ZONE_L_ARM,BODY_ZONE_R_ARM,BODY_ZONE_L_LEG,BODY_ZONE_R_LEG,BODY_ZONE_PRECISE_EYES,BODY_ZONE_PRECISE_GROIN) - M.get_missing_limbs() //no inserting into magic limbs you dont have
+	//check if we can put an organ in there
+	var/insertionZone = pick(possibleZones)
+	var/insertionAvailable = TRUE
+	for(var/obj/item/organ/tumor/IT in M.internal_organs)
+		if(IT.zone == insertionZone)
+			insertionAvailable = FALSE
+	if(insertionAvailable)
+		var/obj/item/organ/tumor/T = new tumortype()
+		T.name = T.name + " (" + parse_zone(insertionZone) + ")"
+		T.helpful = helpful
+		T.regeneration = regeneration
+		T.ownerdisease = ownerdisease
+		T.Insert(M,FALSE,FALSE,insertionZone)
+		if(from_tumor)
+			to_chat(M, span_warning("[pick("Your insides writhe.", "You feel your insides squirm.")]"))
+		else
+			to_chat(M, span_warning("Your [parse_zone(insertionZone)] hurts."))
+				
+/datum/symptom/tumor/End(datum/disease/advance/A)
+	..()
+	if(ishuman(A.affected_mob))
+		//unfuck their tumors
+		var/mob/living/carbon/human/M = A.affected_mob
+		M.visible_tumors = FALSE
+		var/datum/species/S = M.dna?.species
+		if(S)
+			S.remove_no_equip_slot(M, SLOT_WEAR_MASK)
+			S.remove_no_equip_slot(M, SLOT_HEAD)
+			S.remove_no_equip_slot(M, SLOT_WEAR_SUIT)
+
+/datum/symptom/tumor/premalignant
+	name = "Premalignant tumors"
+	desc = "The virus causes premalignant growths all over your body."
+	level = 5
+	severity = 4
+	tumor_chance = 1
+	tumortype = /obj/item/organ/tumor/premalignant
+
+/datum/symptom/tumor/malignant
+	name = "Malignant tumors"
+	desc = "The virus causes malignant growths all over your body."
+	level = 7
+	severity = 6
+	tumor_chance = 2
+	tumortype = /obj/item/organ/tumor/malignant
diff --git a/code/modules/mob/living/carbon/carbon_defines.dm b/code/modules/mob/living/carbon/carbon_defines.dm
index c49455f71b16..c989ec52a3fe 100644
--- a/code/modules/mob/living/carbon/carbon_defines.dm
+++ b/code/modules/mob/living/carbon/carbon_defines.dm
@@ -71,5 +71,6 @@
 	var/list/all_wounds
 	/// All of the scars a carbon has afflicted throughout their limbs
 	var/list/all_scars
+	var/visible_tumors = FALSE //if you are seem with some tumors, for examine
 
-	COOLDOWN_DECLARE(bleeding_message_cd)
\ No newline at end of file
+	COOLDOWN_DECLARE(bleeding_message_cd)
diff --git a/code/modules/mob/living/carbon/examine.dm b/code/modules/mob/living/carbon/examine.dm
index aaf01080f3f0..f563234e99ac 100644
--- a/code/modules/mob/living/carbon/examine.dm
+++ b/code/modules/mob/living/carbon/examine.dm
@@ -82,6 +82,9 @@
 	if(fire_stacks < 0)
 		msg += "[t_He] look[p_s()] a little soaked.\n"
 
+	if(visible_tumors)
+		msg += "[t_He] [t_has] has growths all over [t_his] body...\n"
+
 	if(pulledby && pulledby.grab_state)
 		msg += "[t_He] [t_is] restrained by [pulledby]'s grip.\n"
 
diff --git a/code/modules/mob/living/carbon/human/examine.dm b/code/modules/mob/living/carbon/human/examine.dm
index ba32915496ec..5b449ad1a480 100644
--- a/code/modules/mob/living/carbon/human/examine.dm
+++ b/code/modules/mob/living/carbon/human/examine.dm
@@ -206,6 +206,8 @@
 	if(fire_stacks < 0)
 		msg += "[t_He] look[p_s()] a little soaked.\n"
 
+	if(visible_tumors)
+		msg += "[t_He] [t_has] has growths all over [t_his] body...\n"
 
 	if(pulledby && pulledby.grab_state)
 		msg += "[t_He] [t_is] restrained by [pulledby]'s grip.\n"
diff --git a/code/modules/reagents/reagent_containers/bottle.dm b/code/modules/reagents/reagent_containers/bottle.dm
index 891f2d247526..8a3c9f7c40b6 100644
--- a/code/modules/reagents/reagent_containers/bottle.dm
+++ b/code/modules/reagents/reagent_containers/bottle.dm
@@ -251,6 +251,11 @@
 	desc = "A small bottle. Contains H13N1 flu virion culture in synthblood medium."
 	spawned_disease = /datum/disease/advance/flu
 
+/obj/item/reagent_containers/glass/bottle/tumor
+	name = "tumor culture bottle"
+	desc = "A small bottle. Contains tumor culture in synthblood medium."
+	spawned_disease = /datum/disease/advance/tumor
+
 /obj/item/reagent_containers/glass/bottle/retrovirus
 	name = "Retrovirus culture bottle"
 	desc = "A small bottle. Contains a retrovirus culture in a synthblood medium."
diff --git a/code/modules/surgery/organs/organ_internal.dm b/code/modules/surgery/organs/organ_internal.dm
index 061a034a67a0..d84eee1304ce 100644
--- a/code/modules/surgery/organs/organ_internal.dm
+++ b/code/modules/surgery/organs/organ_internal.dm
@@ -29,12 +29,15 @@
 	var/high_threshold_cleared
 	var/low_threshold_cleared
 
-/obj/item/organ/proc/Insert(mob/living/carbon/M, special = 0, drop_if_replaced = TRUE)
+/obj/item/organ/proc/Insert(mob/living/carbon/M, special = 0, drop_if_replaced = TRUE,special_zone = null)
 	if(!iscarbon(M) || owner == M)
 		return
 
+	if(special_zone)
+		zone = special_zone
+
 	var/obj/item/organ/replaced = M.getorganslot(slot)
-	if(replaced)
+	if(replaced && !special_zone)
 		replaced.Remove(M, special = 1)
 		if(drop_if_replaced)
 			replaced.forceMove(get_turf(M))
diff --git a/code/modules/surgery/organs/tumors.dm b/code/modules/surgery/organs/tumors.dm
new file mode 100644
index 000000000000..b04a7d4c2145
--- /dev/null
+++ b/code/modules/surgery/organs/tumors.dm
@@ -0,0 +1,80 @@
+#define TUMOR_STRENGTH_WEAK 0.125
+#define TUMOR_STRENGTH_AVERAGE 0.25
+#define TUMOR_STRENGTH_STRONG 0.5
+
+#define TUMOR_SPREAD_WEAK 0.5
+#define TUMOR_SPREAD_AVERAGE 1
+#define TUMOR_SPREAD_STRONG 2
+
+/obj/item/organ/tumor
+	name = "benign tumor"
+	desc = "Hope there aren't more of these."
+	icon_state = "tumor"
+
+	var/strength = TUMOR_STRENGTH_WEAK
+	var/spread_chance = TUMOR_SPREAD_WEAK
+
+	var/helpful = FALSE //keeping track if they're helpful or not
+	var/regeneration = FALSE //if limbs are regenerating
+	var/datum/disease/advance/tumor/ownerdisease //what disease it comes from
+
+/obj/item/organ/tumor/Insert(mob/living/carbon/M, special = 0)
+	. = ..()
+	START_PROCESSING(SSobj, src)
+
+/obj/item/organ/tumor/Remove(mob/living/carbon/M, special = 0)
+	. = ..()
+	var/tumors_left = FALSE
+	for(var/obj/item/organ/tumor/IT in owner.internal_organs)
+		if(IT.ownerdisease == ownerdisease)
+			tumors_left = TRUE
+	if(!tumors_left)
+		//cure the disease, removing all tumors 
+		ownerdisease.cure()
+	STOP_PROCESSING(SSobj, src)
+
+/obj/item/organ/tumor/process()
+	if(!owner)
+		return
+	if(!(src in owner.internal_organs))
+		Remove(owner)
+	if(helpful)
+		if(owner.getBruteLoss() + owner.getFireLoss() > 0)
+			owner.adjustToxLoss(strength/2)
+			owner.adjustBruteLoss(-(strength/2))
+			owner.adjustFireLoss(-(strength/2))
+	else
+		owner.adjustToxLoss(strength) //just take toxin damage
+		//regeneration
+	if(regeneration && prob(spread_chance))
+		var/list/missing_limbs = owner.get_missing_limbs() - list(BODY_ZONE_HEAD, BODY_ZONE_CHEST) //don't regenerate the head or chest
+		if(missing_limbs.len)
+			var/limb_to_regenerate = pick(missing_limbs)
+			owner.regenerate_limb(limb_to_regenerate,TRUE)
+			var/obj/item/bodypart/new_limb = owner.get_bodypart(limb_to_regenerate)
+			new_limb.receive_damage(45); //45 brute damage should be fine I think??????
+			owner.emote("scream")
+			owner.visible_message(span_warning("Gnarly tumors burst out of [owner]'s stump and form into a [parse_zone(limb_to_regenerate)]!"), span_notice("You scream as your [parse_zone(limb_to_regenerate)] reforms."))
+	if(prob(spread_chance))
+		if(ownerdisease)
+			ownerdisease.spread(owner, TRUE)
+
+
+/obj/item/organ/tumor/premalignant
+	name = "premalignant tumor"
+	desc = "It doesn't look too bad... at least you're not dead, right?"
+	strength = TUMOR_STRENGTH_AVERAGE
+	spread_chance = TUMOR_SPREAD_AVERAGE
+
+/obj/item/organ/tumor/malignant
+	name = "malignant tumor"
+	desc = "Yikes. There's probably more of these in you."
+	strength = TUMOR_STRENGTH_STRONG
+	spread_chance = TUMOR_SPREAD_STRONG
+
+#undef TUMOR_STRENGTH_WEAK 
+#undef TUMOR_STRENGTH_AVERAGE 
+#undef TUMOR_STRENGTH_STRONG 
+#undef TUMOR_SPREAD_WEAK
+#undef TUMOR_SPREAD_AVERAGE
+#undef TUMOR_SPREAD_STRONG
diff --git a/icons/obj/surgery.dmi b/icons/obj/surgery.dmi
index 1519b52c16d6..24fba73d1dc2 100755
Binary files a/icons/obj/surgery.dmi and b/icons/obj/surgery.dmi differ
diff --git a/yogstation.dme b/yogstation.dme
index e24438c62a06..cecfdfef576d 100644
--- a/yogstation.dme
+++ b/yogstation.dme
@@ -537,6 +537,7 @@
 #include "code\datums\diseases\advance\symptoms\sneeze.dm"
 #include "code\datums\diseases\advance\symptoms\species.dm"
 #include "code\datums\diseases\advance\symptoms\symptoms.dm"
+#include "code\datums\diseases\advance\symptoms\tumors.dm"
 #include "code\datums\diseases\advance\symptoms\viral.dm"
 #include "code\datums\diseases\advance\symptoms\vision.dm"
 #include "code\datums\diseases\advance\symptoms\voice_change.dm"
@@ -3100,6 +3101,7 @@
 #include "code\modules\surgery\organs\stomach.dm"
 #include "code\modules\surgery\organs\tails.dm"
 #include "code\modules\surgery\organs\tongue.dm"
+#include "code\modules\surgery\organs\tumors.dm"
 #include "code\modules\surgery\organs\vocal_cords.dm"
 #include "code\modules\swarmers\swarmer.dm"
 #include "code\modules\swarmers\swarmer_act.dm"