Endocrinology

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A 24-year-old African American man presents for a routine eye examination. Theocular findings are unremarkable; however, well-circumscribed areas of whitenedskin are noted on his forehead and hands (A and B). The patient reportsthat the patchy loss of pigment has been progressing over a number of years.

The incidence of hypertension, diabetes, certain types ofcancer, and other chronic diseases is disproportionatelyhigher in African Americans than in white Americans. Thestatistics presented in the Table illustrate the magnitudeof this disparity. For other diseases, such as breast cancer,the incidence is lower but mortality is higher in AfricanAmericans.

In recent years, 2 large randomized,controlled studies have documentedthe efficacy of the anticonvulsantgabapentin in the management ofpainful diabetic neuropathy (PDN)1and post-herpetic neuralgia (PHN).2Although vastly different in origin,these 2 neuropathies have exhibitedsome similarities in their response totherapeutic agents of various classes.The discovery that yet another typeof pharmaceutical is useful in treatingpain from either PDN or PHN hasraised questions about the similaritiesand differences in the managementof these 2 painful neuropathicsyndromes.

A 70-year-old man complains of a sudden, painless loss ofvision in the left eye that occurred several hours earlier. He denies traumaand previous visual disturbances. His history is significant for peripheralvascular disease and type 2 diabetes mellitus.

A 67-year-old man with poorly controlled type 2 diabetes mellitus presents withleg pain and swelling that began 3 days earlier. Multiple ulcers are noted at thelateral malleolus. His temperature is 38.9°C (102.1°F). Right lower extremitycellulitis is diagnosed, blood samples are taken for culture, and the patient ishospitalized.

Test Your Diagnostic Skills

What caused these linear, grouped, pigmented papules on a child's back? These symmetrical hyperpigmented patches on a man's face? Test your diagnostic skills.

A 56-year-old man with insulin-dependent type 2 diabetes is hospitalized foroperative debridement of an ulcer on his left heel. During the preoperativeevaluation, atrial fibrillation (AF)-with a ventricular rate of 130 beats perminute-is detected.

During the past few weeks, a 14-year-old boy has noticed blood on the proximalnail folds of the second and third fingers of his dominant hand. He deniesany pain or pruritus. The patient is otherwise healthy and takes no prescriptionmedications.

A 34-year-old man has had Crohn disease for 12years. He presented initially with ileitis and has had 3surgeries for obstructive complications. Ileum resectionhas resulted in bile salt and fat malabsorption. Recently,the Crohn disease has spread to the large bowel. For thelast 2 years, he has also had seronegative spondyloarthropathy-another complication of Crohn disease.

An 84-year-old woman presents with a 3-year history of slowly progressivememory impairment accompanied by functional decline. Thepatient lives alone but has been receiving an increasing amount of support from her 2 daughters,who accompany her to the appointment. The daughters first noticed that their mother was havingtrouble driving. About a year ago, she started forgetting family recipes. She also left food cookingon the stove unattended and burned several pans. Currently, the daughters are providing mealsand transportation, assisting with housework, and doing their mother’s laundry. They have becomeincreasingly alarmed because she takes her medications only sporadically, despite the factthat they fill her pillboxes and call her regularly with reminders. Their chief concern is whether itis safe for their mother to continue to live alone.

For 3 months, a 57-year-old woman has had a persistent green nail that is occasionallyslightly sore; the nail plate has lifted. Another physician prescribed a7-day course of levofloxacin for a suspected Pseudomonas infection; the treatmenthad no effect on the nail. A subsequent 7-day course of norfloxacin wasalso unsuccessful. The patient is otherwise healthy.

For the past 2 days, an elderly woman has had severe pain in and discharge from the right ear. She has diabetes, which is well controlled with anoral hypoglycemic agent, and eczematous dermatitis.

A 67-year-old woman who is being treated as an inpatient for head traumacomplains of vague tenderness during an abdominal examination. Othercomplaints are difficult to assess. She had been placed on an oxygen ventilator;however, her cognitive function and pulmonary function are improving, andher cerebral edema is diminished.

SAN ANTONIO -- The advent of endocrine therapy for breast cancer has raised a host of unanswered questions about who should get the new drugs, when, and what should be done about treatment side effects, researchers said here.

ABSTRACT: Age-related changes that affect drug distribution, such as increased total body fat, decreased muscle mass, and decreased total body water, necessitate reduction in the dosage of water- and lipid-soluble agents. Because creatinine clearance declines with age, the dosage of agents that are excreted primarily by the kidney must also be lowered to prevent toxicity. Examples include aminoglycosides, fluoroquinolones, penicillins, procainamide, lithium, angiotensin-converting enzyme inhibitors, and digoxin. A good rule of thumb to follow until creatinine clearance can be calculated is to reduce the total dose by half in frail elderly persons or in those with established renal disease. Anticholinergic agents should be used with caution because they are associated with urinary retention, heart block, constipation, dry mouth, blurred vision, sedation, and acute or chronic confusion in elderly patients.

ABSTRACT: Painful recurrent ulceration of gingival tissue suggests a secondary intraoral presentation of herpes simplex virus (HSV) infection. Unlike the lesions of HSV, lesions associated with coxsackievirus do not erupt in the anterior mouth but rather on the soft palate and pharynx. Furthermore, unlike HSV infection, coxsackie infections may recur, because there is considerable viral variation. Patients with atrophic or erythematous candidiasis report burning pain and a metallic taste. The typical patient with benign mucous membrane pemphigoid is a woman older than 50 years; the condition usually involves the attached gingiva around the teeth. The lesions of erythema multiforme may erupt on any intraoral mucosa; biopsy may be required to rule out other conditions with similar presentations.

If you notice labile thyroid-stimulating hormone (TSH) values in a patient receiving levothyroxine therapy for primary hypothyroidism, ask how he or she takes the medication. Levothyroxine should always be taken on an empty stomach (usually first thing in the morning) with water only; no other fluids, food, or medications should be consumed for 30 minutes afterwards.

During a routine checkup, a middle-aged woman asks you whether she should stop wearing moisturizers and makeup that contain sunscreen. She has read that increased sunlight exposure enhances vitamin D production, which may prevent certain types of cancer. What would you tell her?