The alimentary secondary hyperparathyroidism is not so rare as many specialists think. For period of only 9 months we diagnosed in our clinics 17 cases and had serious observations in other 9 cases (the owners didn’t agree to prove 100 % in Laboklin) in different stages of the problem evaluating. We present below our treatment protocol and two concrete complicated cases – both with healed patients but one not operated – and our consequences experience in cases with or without surgery.
The hyperparathyroidism is primary and secondary. The secondary could be renal – complication of chronic renal insufficiency, it is more often seen even in comparison to the primary – and alimentary: rarest but for sure not exotic. The alimentary variant is seen in young dogs and especially cats fed only or almost only with meat. The low calcium levels and the inadequate calcium/phosphor ratio in meat starts a multi-vector pathological process evaluating for a couple of weeks to following clinical picture: unwilling for moving, lameness, stiff walking, spontaneous fractures, face edemas, easily teeth removing or teeth loosening, spontaneous neurological deficit in different levels. The standard hematological and biochemical blood panels usually do not give any diagnose direction. It is common the right diagnose to be reached with delay because often the colleagues miss during the anamnestic phase to become well informed about the alimentary regime of the patient, X-rays are rarely made in the very beginning and usually the therapy starts with NSAIDS and general strengthening protocol.
This disease not rarely causes hind legs function insufficiency and neurological deficit, paradoxally not corresponding to and many times exceeding the found through imaging diagnostic bone (including vertebral) changes. It is not exotic OCD (even in cats) to be diagnosed later due to cartilage underlying bone and bone vessels malformation.
Most directing is the anamneses especially the alimentary regime of the young patient. Absolutely enough for 90 % sure diagnose is combination of anamneses, estimation of the bone geometry and density due to X-rays covering flat bones, spinal cord, mandibula, maxilla and blood levels of macro elements especially P. For 100 % sure diagnose we send blood hormon sample to Laboklin Germany. The differential diagnoses are not many and include some genetic or metabolic disorders.
Our newest therapeutic protocol, product of enough clinical experience and leading to fastest and completest healing includes:
- Hospitalization of the patient in cage for maximal immobilization aiming to avoid pathological fractures and especially vertebral fractures.
- Diet change to P-poor and Ca-rich: the variants are so many, ii is important the diet to be diverse and with enough vitamins. In most of the cases we start with renal diet combined with additional food components;
- Calo-pet – zero P molecules and very adequate composition for this problem;
- NEO-K9: not only because of the demonstrative bone healing stimulation but also very adequate against all cases of hyperphosphatemia – and in cases of alimentary hyperparathyroidism we have severe hyperphosphatemia as well as serious bone demineralization and decrease of their potential for resistance to physical forces and for healing;
- Ipakitine – because of its ability to chelate and eliminate the phosphor
- HyalOral – because of its adequate to the therapy (especially against intra-joints complications) composition and especially because of the gamma-oryzanol inside
- NSAIDS – against pain and inflammation
- Calciferol (Vitamin D3) in dosage 2 ng/kg/24h– please be very careful when using it because increases the resorption of calcium but also of phosphor. Should be added to the protocol only after the phosphor is already in normal blood levels or very close to them;
- Sometimes after careful individual estimation – oral pure Ca human product for children or even injectable Ca vet product;
- Often repeated biochemical including P and Ca blood monitoring (a big Thank you! to our trusted lab VetDiaLab for the precise and reliable work during the last 15 years), every-day neurological monitoring and checking the ability for urination, every-day check for rib and long bone fractures and regular (minimum every 8-10 days) X-ray follow-up of the geometry and healing of all fissures and fractures;
- Therapy against the complications including the spontaneous fractures, eating difficulties because of jaw problems ets.
This algorithm leads to very fast and demonstrative health status improvement. Of course it is very important to estimate carefully when the patient is ready to get out of the cage. We recommend the bone fissues to be X-ray monitored every 5-10 days and all long-bone fractures to be operated especially those near the knee joints. The reason?: the long-bone fractures caused by SAHPT heal very often with malunion which is being well tolerated by young animals but many of them suffer when achieve adult/mature age. On the other hand we recommend vertebral fractures to be operated only in case of neurological deficit or pain. In all cases of eating difficulties esofageal probe and not manual assisted eating is recommendable.
Case 1: cat Darko, SAHPT complicated with two supracondylar femural fractures, operated with delay. We added Calciferol to the therapy protocol at the 7th day when the blood phosphor decreased to normal levels. The owners asked us not to operate and to wait but as usual despide the cage rest after a couple of days the fragments geometry get worse and the healing would lead to malunion and may be to patellar luxation. The owners agreed to operate, the surgeries with implants of Mikromed were fast and simple (peri-operatively: Clavaseptin) and the case result is 100% healthy and extremely mobil cat:
Case two: cat Pisi, SAHPT complicated with fissure and fracture, not operated. The X-ray fissure (left humerus) follow up showed no need to operate and healed without problems. Unfortunately we didn’t receive permission to operate the fracture and as usual the result is serious malunion:
Conclusion: strict cage rest, strict food and therapeutical protocol, strict clinical and paraclinical monitoring and careful surgery estimation = successful outcome.