Rodrigo Arrangoiz MS, MD, FACS, FSSO

Rodrigo Arrangoiz MS, MD, FACS, FSSO Assistant Professor at the Columbia University Division of Surgical Oncology at Mount Sinai Medical Center

Surgical Excellence / Excelencia Quirúrgica

04/17/2026
When to Include Level IV in Elective Neck Dissections in cN0 Oral Cavity Squamous Cell Carcinoma (SCC)
04/14/2026

When to Include Level IV in Elective Neck Dissections in cN0 Oral Cavity Squamous Cell Carcinoma (SCC)

The decision to extend a supraomohyoid neck dissection (levels I to III) to include level IV (extended supraomohyoid neck dissection): Hinges on whether pN+ disease is discovered in levels I to III…

Byers et al. Skip Metastasis Rate
04/13/2026

Byers et al. Skip Metastasis Rate

The 15.8% skip metastasis rate reported by Byers et al. (1997): Is widely considered an overestimate due to several important methodological issues that have been carefully dissected in subsequent …

Comprehensive Review of the Literature on Elective Neck Dissection (END) for Oral Cavity Squamous Cell Carcinoma (SCC)
04/11/2026

Comprehensive Review of the Literature on Elective Neck Dissection (END) for Oral Cavity Squamous Cell Carcinoma (SCC)

Indications for END: Depth of Invasion (DOI) Thresholds: DOI is the single most important predictor: Guiding the decision to perform END in cN0 oral cavity SCC The NCCN Guidelines stratify the deci…

Depth of Invasion (DOI) in Oral Cavity Cancers: AJCC 8th vs 9th Edition — What Changed?
04/10/2026

Depth of Invasion (DOI) in Oral Cavity Cancers: AJCC 8th vs 9th Edition — What Changed?

Big Picture: AJCC 8th Edition (2017): Introduced Depth of Invasion (DOI) as a major determinant of T stage in oral cavity squamous cell carcinoma (OCSCC) AJCC 9th Edition (2024 / 2025 update): Reta…

Perrier ND et al. — A Novel Nomenclature to Classify Parathyroid AdenomasA novel nomenclature to classify parathyroid ad...
04/09/2026

Perrier ND et al. — A Novel Nomenclature to Classify Parathyroid Adenomas

A novel nomenclature to classify parathyroid adenomas: World Journal of Surgery. 2009;33(3):412–416 Background and Rationale: Traditional descriptions of parathyroid adenomas (e.g., “left inferior,” “ectopic”): Are inconsistent and often imprecise: Particularly in reoperative surgery or when imaging is discordant Problem: Variable embryologic descent → unpredictable locations Poor communication between surgeons, radiologists, and endocrinologists Difficulty standardizing outcomes and reporting Goal of Perrier et al: Develop a standardized, anatomically reproducible nomenclature based on predictable embryologic migration patterns Embryologic Basis (Core Concept) During the fifth to sixth week of intrauterine development: The…...

A novel nomenclature to classify parathyroid adenomas: World Journal of Surgery. 2009;33(3):412–416 Background and Rationale: Traditional descriptions of parathyroid adenomas (e.g., “left inferior,…

Depth of Invasion in Oral Cavity Cancer
04/09/2026

Depth of Invasion in Oral Cavity Cancer

The staging of primary tumors of the oral cavity: As published by the AJCC and UICC is widely accepted In its most recent revision (eighth edition of the AJCC Staging Manual): Depth of invasion (DO…

Evaluation of Oral Cavity Cancer
04/08/2026

Evaluation of Oral Cavity Cancer

The clinical features of primary tumors arising from the mucosal surface of the oral cavity are: Variable The tumor may be: Ulcerative Exophytic Endophytic The gross characteristics of the lesion: …

Precursor Lesions of Oral Cavity Cancer
04/07/2026

Precursor Lesions of Oral Cavity Cancer

There is a sequence of disease progression from: Atypia / dysplasia, to in situ carcinoma, to invasive cancer Leukoplakia and erythroplakia: Are terms given to clinically identifiable lesions: That…

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Who is Rodrigo Arrangoiz MS, MD, FACS? / Quien es Rodrigo Arrangoiz MD, MS, FACS


  • My name is Rodrigo Arrangoiz, I went to medical school at the Anahuac University in Mexico City, which is one of the most prestigious medical schools in Mexico:I graduated Suma Cum Laude from this medical school and was the president of the student medical council.

  • I trained in general surgery at Michigan State University where I was named chief resident during my fifth year of residency which was a great honor.

  • My complex surgical oncology fellowship which included head and neck training was performed at the Fox Chase Cancer Center in Philadelphia, Pennsylvania.

  • At the same time, I undertook a Masters in Science (Clinical Research for Health Care Professionals) at Drexel University in Philadelphia, Pennsylvania.