Reaction profile

The FDA adverse-event record for mammary gland neoplasm nos

Name: Mammary gland neoplasm NOS - FDA Animal Adverse Reaction
Creator: PlainBreed
License: https://open.fda.gov/license/

127 FDA adverse-event reports reference mammary gland neoplasm nos (VeDDRA 529). Plate codes and volume neighbourhood below; species, breeds, and drugs follow.

#1277 of 2,481
by report volume (all reactions): 127
reports citing this reaction: 31.5%
death-coded share: Dog
most-affected species

Compiled by PlainBreed

Verify with FDA CVM →

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Mammary gland neoplasm NOS has 127 reports now versus 126 in that prior snapshot: 1 more (0.8%).

Report change: +1
Death-coded reports: +0
Death-coded share: −0.2 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Mammary gland neoplasm NOS changes

FDA AER · VeDDRA plate

Code 529 VOL-LOW

VOL-LOW · DEATH-HOT · MID-PACK · PHOTO-FINISH · SPECIES-DOG · DRUG-LEAD · DESK-WIDE · BOOK-FULL

VOL-LOW 127 reports
DEATH-HOT 31.5%
MID-PACK #1277/2481
PHOTO-FINISH Cyst NOS
SPECIES-DOG Dog · 113
DRUG-LEAD Oclacitinib Malea… · 29
DESK-WIDE 20 breeds
BOOK-FULL 8/8 fields

Nearest volume peer: Cyst NOS (±0 reports)

Upper-third death-coded share drives the outcome stamps on this plate; volume band, corpus rank, and co-report peers follow. Not a clinical diagnosis.

Report-volume neighbourhood around Mammary gland neoplasm NOS

Highest and lowest poles plus nearest volume peers, not a full 2,500-reaction corpus board reprint.

FDA AER report volume · neighbourhood around Mammary gland neoplasm NOS

Mammary gland neoplasm NOS: high death-coded share in the FDA AER plate

Signature read: Mammary gland neoplasm NOS's 31.5% death-coded share is among the highest in the openFDA reaction corpus. Report volume sits in the middle third of the reaction corpus. Death-coded share is upper-third: 40 of 127 reports (31.5% of named reports). Nearest volume peer: Cyst NOS (±0 reports). Lead species Dog (113). Lead co-reported drug Oclacitinib Maleate (29).

Read these counts as reporting volume, not risk: per our methodology, A high death-coded share in FDA filings does not prove causation; co-reporting is voluntary temporal association only. Browse the full reactions index or the about page for how PlainBreed frames FDA CVM extracts.

Species Most Affected

Dog 113

Cat 12

Ferret 1

Human 1

Breeds Most Affected

Retriever - Labrador 12

Crossbred Canine/dog 9

Terrier - Yorkshire 6

Beagle 6

Shepherd Dog - German 6

Domestic Shorthair 5

Doberman Pinscher 5

Retriever - Golden 5

Shepherd Dog - Australian 5

Siberian Husky 4

Associated Drugs

Oclacitinib Maleate 29

Milbemycin Oxime + Spinosad 19

Spinosad 8

Ivermectin + Pyrantel As Pamoate Salt 7

Cyclosporine A 6

Afoxolaner 6

Bedinvetmab 5

Trilostane 4

Estriol Tablets 4

Fluralaner Chew Tablets 4

Carprofen 3

Cyclosporine 3

Nitenpyram 3

Moxidectin 3

Phenylpropanolamine 2

Ketoconazole 2

Prednisone 2

Insulin Injectable Vial 2

Cefpodoxime Proxetil 2

Imidacloprid + Moxidectin 2

Nationwide reactions with similar profiles

Two openFDA-derived peer sets for Mammary gland neoplasm NOS, both floored at ≥50 reports so the neighborhoods stay in the advertised mass (the volume chart above is the unfloored photo-finish strip).

Similar report volume

Nearest other reactions by FDA report count (127 here).

Cyst NOS 127 HYPERBILIRUBINEMIA 127 INEFFECTIVE, WEIGHT LOSS 127 Low pancreatic enzymes 127

Similar death-coded share

Nearest other reactions by death-coded share (31.5% here), distinct from the volume row.

Acid-base disorder 31.5% Milk drop 31.5% Unconscious 31.5% Melaena 31.5%

What to do with this reaction

Compare Mammary gland neoplasm NOS's report profile against similar reactions nationwide. See similar reactions
Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
Browse the full reaction directory to compare report counts across reaction types. All reactions

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Mammary gland neoplasm NOS (#1277 of 2,481 by report volume); death-coded 31.5%. PlainBreed reaction plate · death-coded share stamp 31.5% · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →