Phenotypes Associated with This Genotype

Genotype
MGI:3805033

• Allelic Composition: Brca1^tm1Thl/Brca1^tm1Thl; Wap^tm1(cre)Arge/0
• Genetic Background: involves: 129S1/Sv * C57BL/6J

• ♀: phenotype observed in females
• ♂: phenotype observed in males
• N: normal phenotype

neoplasm

increased mammary adenocarcinoma incidence ( J:134977 )

• almost all female mice who have been pregnant at least once develop mammary tumors with a mean tumor free latency of 512 days

• majority of tumors are solid, do not express the estrogen receptor but are CK14 positive

• the majority of the tumors are Dunn type B adenocarcinomas with a medullary growth pattern that display variable necrosis and lack peripheral lymphocytic infiltrate

• carnicomas contain pleomorphic cells with numerous mitotic figures such as lagging chromosomes

• neoplasms often invade in a broad front and push towards the underlying pectoral muscle

• a small minority of tumors have sqaumous characteristics

• pre-cancerous neoplasia are also evident throughout the mammary gland

integument

increased mammary adenocarcinoma incidence ( J:134977 )

• almost all female mice who have been pregnant at least once develop mammary tumors with a mean tumor free latency of 512 days

• majority of tumors are solid, do not express the estrogen receptor but are CK14 positive

• the majority of the tumors are Dunn type B adenocarcinomas with a medullary growth pattern that display variable necrosis and lack peripheral lymphocytic infiltrate

• carnicomas contain pleomorphic cells with numerous mitotic figures such as lagging chromosomes

• neoplasms often invade in a broad front and push towards the underlying pectoral muscle

• a small minority of tumors have sqaumous characteristics

• pre-cancerous neoplasia are also evident throughout the mammary gland

endocrine/exocrine glands

increased mammary adenocarcinoma incidence ( J:134977 )

• almost all female mice who have been pregnant at least once develop mammary tumors with a mean tumor free latency of 512 days

• majority of tumors are solid, do not express the estrogen receptor but are CK14 positive

• the majority of the tumors are Dunn type B adenocarcinomas with a medullary growth pattern that display variable necrosis and lack peripheral lymphocytic infiltrate

• carnicomas contain pleomorphic cells with numerous mitotic figures such as lagging chromosomes

• neoplasms often invade in a broad front and push towards the underlying pectoral muscle

• a small minority of tumors have sqaumous characteristics

• pre-cancerous neoplasia are also evident throughout the mammary gland

Mouse Models of Human Disease		DO ID	OMIM ID(s)	Ref(s)
breast cancer		DOID:1612	OMIM:114480	J:134977