A 45-year-old farmer comes in for skin evaluation and complains of hair loss. He has noticed that the hair on his head seems to be breaking off in patches and that there is some scaling on his scalp. The nurse would begin the examination suspecting:

Correct Answer: A

Rationale: The correct answer is A: tinea capitis. Tinea capitis is a fungal infection of the scalp that can cause hair loss, scaling, and breakage of hair. In this case, the patient's symptoms of hair loss, patchy hair breakage, and scaling on the scalp are consistent with tinea capitis. The nurse should suspect tinea capitis based on the presentation of these specific symptoms in the patient. Summary: - B: tinea corporis is a fungal infection of the skin, not the scalp, so it is not the most likely cause of the patient's symptoms. - C: toxic alopecia refers to hair loss due to exposure to toxins, which is unlikely in this case based on the symptoms described. - D: seborrheic dermatitis is a common skin condition that causes redness, scaly patches, and dandruff on the scalp, but it does not typically cause hair loss in the same way as tinea capitis

Correct Answer: B

Rationale: The correct answer is B: Lyme disease. The presentation of a red circular rash with central clearing, known as erythema migrans, following a hiking trip in the summer is highly indicative of Lyme disease. The specific distribution of the rash across the midriff and behind the knees aligns with typical areas where the rash appears in Lyme disease cases. This rash is a hallmark sign of early Lyme disease caused by the bacterium Borrelia burgdorferi transmitted through the bite of an infected tick. Other answer choices are incorrect because rubeola presents with a different rash pattern, an allergy to mosquito bites would not typically present in this manner, and Rocky Mountain spotted fever typically presents with a different rash appearance and distribution.

Correct Answer: C

Rationale: The correct answer is C: Spoon nails. In iron-deficiency anemia, the nails may develop a concave or spoon-like shape (koilonychia). This is due to the decreased oxygen supply to the nail bed. The characteristic spoon nails are indicative of severe iron deficiency. Splinter hemorrhages (choice A) are small areas of bleeding under the nails and are more commonly associated with conditions like endocarditis. Paronychia (choice B) is an infection around the nail, not specific to anemia. Beau's lines (choice D) are horizontal depressions in the nails, typically seen after a period of severe illness or stress, rather than specifically in iron-deficiency anemia.

Correct Answer: B

Rationale: The correct answer is B: damage to the trigeminal nerve. Trigeminal nerve damage can result in the inability to differentiate between sharp and dull sensations on the face. The trigeminal nerve is responsible for transmitting sensory information from the face to the brain. Bell's palsy (choice A) affects facial muscles, not sensory perception. Frostbite (choice C) typically causes numbness rather than loss of sensation discrimination. Scleroderma (choice D) is a connective tissue disorder that does not directly affect sensory perception on the face.

Correct Answer: A

Rationale: The correct answer is A: thyroid gland. Thyroxine is a hormone produced by the thyroid gland. An elevated thyroxine level indicates a potential thyroid gland dysfunction. The nurse would examine the thyroid gland to assess its size, texture, and any signs of abnormalities. Incorrect choices: B: Parotid gland - This gland is responsible for producing saliva, not thyroxine. C: Adrenal gland - Responsible for producing hormones like cortisol and adrenaline, not thyroxine. D: Thyroxine gland - There is no such thing as a "thyroxine gland." Thyroxine is a hormone produced by the thyroid gland.