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Nodules, Bumps, or Hives in Horses
  by Robert N. Oglesby DVM

Introduction

Introduction » Differentiating Bumps by Appearance » Chronic Fly Bite Reactions: Nodular Necrobiosis » Aural (Ear) Plaques » Warts » Melanomas » Hives » Sarcoids » Habronemiasis or Summer Sores » Nasal Arethroma: Nasal Cysts » Other Possibilities » More Info 

Horse skin seems prone to many problems characterized by a lump, bump, nodule, or swelling. To make identifying the cause of your bump easier we have to refine our vocabulary a bit. As we better define the meanings the list of possible disease grows shorter for each term:
  • Papule: a small (1 cm or less) firm palpable mass.
  • Nodule: a large (1 to 3 cm) firm palpable mass.
  • Tumor: a very large (> 3 cm) mass.
  • Cyst: a flucuent well descibed mass usually indicating a fluid filled sack.
  • Wheal or Hives: a small to fairly large focal swelling of the skin that pits when pressed.
  • Blister (or vesicle): Swelling on the surface of the skin or mucous membrane filled with clear serum. When it burst it leaves behind a erosion or ulcer.

Let's diffentiate the above from swellings. Swellings are when fluid accumulates under the skin, and cause a focal or generalized enlargment by pushing out on the skin. Swellings are covered in their own article...more.

Because there are many different common causes for bumps, the only sure way to know what a bump is requires removal and laboratory exam. However, you can get pretty close to an accurate diagnosis by careful examination and history on many bumps. This report helps differentiate the major causes of lumps and bumps in horses by their appearance and how they behave and provide treatment quidelines. Links are provided to more specific disease articles.
      ~Word Count: 2547 words (The average magazine page contains about 600 words);
      ~Last Updated: August 16, 2008;

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Discussions on Overview of Bumps, Nodules, Warts & Tumors

Subtopics Posts Updated
iconHard Bump on BellyNov 13, 08
iconBump on Back22 Sep 27, 08
iconHELP! Golfball size hard mass on CrestAug 21, 08
iconSwollen Glands Jul 24, 08
iconNodule~Lymph Node? Allergy? 17 May 31, 08
iconDark fluid filled bumpsMay 31, 08
iconLump on chest15 May 1, 08
iconBump on cannon bone?Mar 1, 08
iconAural plaques/ AldaraJan 30, 08
iconLump in vulvaSep 5, 07
iconHas anyone heard of protien bumps that develop in the saddle area i...15 Oct 10, 08
iconMovable bumpAug 28, 07
iconSarcoid like bumpsAug 2, 07
iconSarcoidsJul 24, 07
iconBump on ThroatJul 22, 07
iconResearch Summary: Long-term outcome associated with intratumoral ch...May 22, 07
iconCollagen granuloma14 Feb 10, 07
iconHard large bumps, one on either side of the faceFeb 1, 07
iconHard random nodules10 Aug 27, 07
iconStrange bump under colts chinMay 8, 06
iconEquine Papilloma TreatmentAug 7, 05
iconNodule on mouthAug 1, 05
iconBumps all over legs and chestJun 6, 05
iconOdd bumps or are they warts?13 Apr 28, 05
iconWart or Aural Ear PlaqueMar 1, 05
iconAural Plaques29 Feb 7, 08
iconLump on legAug 9, 04
iconBumps Possibly from HERDA Oct 21, 05
iconWarts - how contagious are they?11 Aug 14, 08
iconBumps in girth areaNov 19, 03
iconBump across the face13 Nov 1, 03
iconPapilloma on sheathOct 18, 03
iconGrubs or warbles living under the skinOct 16, 03
iconBone tumour behind earsOct 5, 03
iconStrange growth - looks like lots of little legs - what is it?Sep 18, 03
iconBony tumor on jaw10 Jul 28, 03
iconPressure sores on right side of withers onlyJun 25, 03
iconBiopsy or RemovalApr 25, 03
iconArchived DiscussionsClick link to access data.
iconMolesJun 4, 05
iconHives24 May 23, 05
iconNodular ring on backMar 15, 05
iconHair Loss/Nodules at Girth29 Jun 18, 04
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