Small Animal Dermatology, 3rd edition

CHAPTER 27 HYPERADRENOCORTICISM, FELINE SKIN FRAGILITY SYNDROME 413 Fig. 27.3.Skin torn by simple combing of patient in Figures ...

414 DISEASES/DISORDERS Fig. 27.5.The skin is easily pulled away from the underlying tissues of patient in Figure 27.4. Note bru ...

Fig. 27.7.Fragility of the skin resulting in tearing on the extremity of a 17-year-old female-spayed DLH treated with oral cort ...

chapter 28 Hypothyroidism...................................... DEFINITION/OVERVIEW  Decreased production of thyroid hormones ( ...

CHAPTER 28 HYPOTHYROIDISM 417  Primary hypothyroidism is a defect in thyroid tissue causing a decrease in the secre- tion of th ...

418 DISEASES/DISORDERS CLINICAL FEATURES  Early symptoms are nonspecific: slow progression of clinical signs often delays diagn ...

CHAPTER 28 HYPOTHYROIDISM 419 “Tragic” facial expression Significant hyperkeratosis/seborrheic dermatitis Hyperpigmentation, ...

420 DISEASES/DISORDERS Sick euthryoid syndrome: low serum T 4 due to nonthyroidal illness Specific diseases known to decrease ...

CHAPTER 28 HYPOTHYROIDISM 421 Hypothyroid: pre- and post-T4 results below normal range Requires 8-week withdrawal period for d ...

422 DISEASES/DISORDERS  Synthetic T 3 (liothyronine; 4–6μg/kg TID) administration is not recommended unless impaired absorption ...

CHAPTER 28 HYPOTHYROIDISM 423 Fig. 28.1.Pituitary dwarfism in a young German shepherd. Fig. 28.2.Pituitary dwarfism with hypot ...

424 DISEASES/DISORDERS Fig. 28.3.Excessive scaling with dull brittle hair coat commonly seen with hypothyroidism. Fig. 28.4.Ha ...

CHAPTER 28 HYPOTHYROIDISM 425 Fig. 28.5.Alopecia and mild myxedema of the face in a 4-year-old male-castrate golden retriever. ...

426 DISEASES/DISORDERS Fig. 28.7.Caudal image of the patient in Figure 28.6 demonstrating a “rat” tail appearance with alopecia ...

CHAPTER 28 HYPOTHYROIDISM 427 Fig. 28.9.Myxedema of the extremity of the patient in Figure 28.8. Fig. 28.10.Bacterial follicul ...

428 DISEASES/DISORDERS (a) (b) Fig. 28.11.Hypothyroidism in a 9-year-old female-spayed golden retriever before (a,b) and after ...

CHAPTER 28 HYPOTHYROIDISM 429 (c) (d) Fig. 28.11.(Continued) ...

chapter Keratinization^29 (Cornification) Disorders DEFINITION/OVERVIEW  Keratinization is the process by which the basal kerat ...

CHAPTER 29 KERATINIZATION (CORNIFICATION) DISORDERS 431  Increased production (epidermopoiesis), increased or decreased desquam ...

432 DISEASES/DISORDERS Primary Keratinization Disorders  Ichthyosis: Present at or near birth Nonepidermolytic and epidermoly ...