Catherine E. Klein, MD

Articles by Catherine E. Klein, MD

12 Gut Microbiome Composition and Pathological Complete Response After Chemotherapy in Breast Cancer: Insights From a Pilot Study

ByDiana Kantarovich,Olutayo Sogunro,Christopher Umbricht,Catherine E. Klein, MD,James White,Mehran Habibi

July 7th 2025

PALB2-Positive Breast Cancer in a 40-Year-Old Man

ByPritish Iyer, MD,Jagar Jasem, MD, MPH,Michelle A. Springer, MS, CGC,Catherine E. Klein, MD,Peter Kabos, MD

January 15th 2017

In July 2003, an asymptomatic 40-year-old man presented to his primary care physician for routine care and was found to have a palpable right axillary lymph node.

Management of Young Breast Cancer Patients With de Novo Genetic Mutations

ByChristine M. Fisher, MD, MPH,Catherine E. Klein, MD,Laxmi A. Kondapalli, MD, MSCE,Anthony D. Elias, MD,Virginia F. Borges, MD, MMSc

October 15th 2014

A 24-year-old woman presents to her primary care provider with a mass in her left breast. Examination confirms a 2.2-cm mass in the upper outer quadrant, with a single mobile axillary node that is firm to palpation.

Diagnosis of Invasive Lobular Carcinoma in a Young Woman Presenting With Pleomorphic Lobular Carcinoma in Situ on Core Biopsy

ByNicole Kounalakis, MD,Jennifer Diamond, MD,Kyle Rusthoven, MD,Wendy Horn, MD,Sonali Jindal, MD,Josh Wisell, MD,Catherine E. Klein, MD,Anthony D. Elias, MD,Christina A. Finlayson, MD,Virginia F. Borges, MD, MMSc

April 15th 2011

A 40-year-old premenopausal woman with a new diagnosis of invasive lobular carcinoma occurring in a background of lobular carcinoma in situ presents to a multidisciplinary second opinion clinic.

Early-Stage BRCA2-Linked Breast Cancer Diagnosed in the First Trimester of Pregnancy Associated With a Hypercoagulable State

ByJennifer R. Diamond, MD,Christina A. Finlayson, MD,Christiane Thienelt, MD,Peter Kabos, MD,Laura Hardesty, MD,Linda Barbour, MD, MSPH,Catherine E. Klein, MD,Rachel Rabinovitch, MD,Anthony D. Elias, MD,Virginia F. Borges, MD, MMSc

August 17th 2009

This feature examines the case of a patient with newly diagnosed breast cancer in the setting of a first-trimester pregnancy presenting to our multidisciplinary breast cancer clinic.

Latest Updated Articles

Diagnosis of Invasive Lobular Carcinoma in a Young Woman Presenting With Pleomorphic Lobular Carcinoma in Situ on Core Biopsy
Published: April 15th 2011 | Updated:
Management of Young Breast Cancer Patients With de Novo Genetic Mutations
Published: October 15th 2014 | Updated:
Early-Stage BRCA2-Linked Breast Cancer Diagnosed in the First Trimester of Pregnancy Associated With a Hypercoagulable State
Published: August 17th 2009 | Updated:
PALB2-Positive Breast Cancer in a 40-Year-Old Man
Published: January 15th 2017 | Updated:

Catherine E. Klein, MD

Articles by Catherine E. Klein, MD

12 Gut Microbiome Composition and Pathological Complete Response After Chemotherapy in Breast Cancer: Insights From a Pilot Study

PALB2-Positive Breast Cancer in a 40-Year-Old Man

Management of Young Breast Cancer Patients With de Novo Genetic Mutations

Diagnosis of Invasive Lobular Carcinoma in a Young Woman Presenting With Pleomorphic Lobular Carcinoma in Situ on Core Biopsy

Early-Stage BRCA2-Linked Breast Cancer Diagnosed in the First Trimester of Pregnancy Associated With a Hypercoagulable State

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