# A nurse is assessing a 28-year-old female client with suspected iron-deficiency anemia. Which assessment finding would be most characteristic of this condition?

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## 문제

A nurse is assessing a 28-year-old female client with suspected iron-deficiency anemia. Which assessment finding would be most characteristic of this condition?

## 보기

1. Pale conjunctiva and brittle, spoon-shaped fingernails **✔ 정답**
2. Yellow skin tone and dark brown urine output
3. Small red skin spots and easy bruising
4. Swollen lymph nodes and drenching night sweats

**정답: 1**

## 해설

Pale conjunctiva and spoon-shaped nails (koilonychia) are classic signs of iron-deficiency anemia due to decreased hemoglobin and chronic iron depletion. Other options are associated with different conditions like hemolytic anemia or lymphoma.

## 심화 해설

Understanding the Question

This question asks you to identify the most characteristic assessment finding for iron-deficiency anemia in a 28-year-old female. Iron-deficiency anemia results from insufficient iron to synthesize hemoglobin, leading to a reduction in oxygen-carrying capacity. The clinical manifestations stem from tissue hypoxia and changes in epithelial tissue where iron is a necessary cofactor.

Analysis of Correct Answer (Option 1)

Pale conjunctiva and brittle, spoon-shaped fingernails (koilonychia) are classic physical hallmarks of chronic, severe iron-deficiency anemia.

- Pallor of the conjunctiva is a direct consequence of reduced hemoglobin concentration in the circulating red blood cells. Hemoglobin is the pigment that gives blood its red color; when levels are low, the highly vascularized mucous membranes, such as the conjunctiva, appear pale. This is a reliable and easily assessed sign of anemia.

- Koilonychia (spoon nails) is a specific nail dystrophy strongly associated with iron deficiency. The nails become thin, brittle, and concave with raised edges. While the exact pathophysiology is not fully understood, it is hypothesized that iron depletion impairs the function of iron-dependent enzymes critical for nail bed epithelial cell growth and keratinization. This finding is rare in other types of anemia, making it highly specific.

The provided case report supports the broader concept that iron deficiency manifests with atypical, compulsive behaviors and tissue changes. The report introduces desiderosmia, a compulsive olfactory craving for specific scents, as a rare manifestation closely related to pica [1]. Pica, the craving and consumption of non-nutritive substances like ice (pagophagia) or dirt, is a well-documented behavioral consequence of iron deficiency. The existence of these unusual cravings, whether gustatory or olfactory, underscores that iron depletion has systemic effects beyond the hematopoietic system, including on the central nervous system and epithelial tissues. The epithelial changes leading to koilonychia are thus part of a constellation of iron-deficiency manifestations that include these unusual cravings.

Analysis of Incorrect Options

- Option 2: Yellow skin tone and dark brown urine output are characteristic of hemolytic anemias or liver dysfunction, such as jaundice from elevated bilirubin. In hemolysis, the breakdown of red blood cells releases hemoglobin, which is converted to bilirubin, causing jaundice. The dark urine is due to hemoglobinuria or urobilinogen. This is not a feature of iron-deficiency anemia.

- Option 3: Small red skin spots (petechiae) and easy bruising are indicative of a platelet disorder or thrombocytopenia, not an erythrocyte disorder. Iron-deficiency anemia affects red blood cell production, not platelet count or function, so bleeding tendencies are not a primary manifestation.

- Option 4: Swollen lymph nodes and drenching night sweats are constitutional symptoms, or "B symptoms," highly suspicious for a lymphoproliferative malignancy such as lymphoma. These findings are not associated with a nutritional deficiency anemia.References (research sources)

- [1]Desiderosmia-Associated Iron Deficiency: A Case Report and Review of the Literature.Case reportLee A, Morales S, Quiroz E. (2026) · DOI: 10.7759/cureus.106380

## 임상 시나리오

Iron-Deficiency Anemia: Physical AssessmentRecognizing Classic Epithelial and Hematologic Signs
Inspect the conjunctiva for pallor, a direct sign of reduced hemoglobin. This finding is sensitive for moderate to severe anemia.

Examine the nails for koilonychia (spoon-shaped, brittle nails with raised edges). This finding is highly specific for chronic iron deficiency and results from impaired epithelial cell growth.

CautionPallor alone is not specific to iron deficiency; always correlate with koilonychia or lab values like low ferritin and microcytic hypochromic indices on a CBC.

## 핵심 개념

- **Koilonychia** — Spoon-shaped, brittle fingernails; a classic epithelial manifestation of chronic iron-deficiency anemia due to depletion of iron-dependent enzymes.
- **Pale Conjunctiva** — A clinical sign of anemia assessed by inspecting the inner eyelid; reflects reduced hemoglobin concentration in mucosal capillaries.
- **Microcytic Hypochromic Anemia** — A classification of anemia where red blood cells are smaller than normal and paler, most commonly caused by iron deficiency.
- **Plummer-Vinson Syndrome** — A rare complication of long-standing iron-deficiency anemia characterized by dysphagia, esophageal webs, and glossitis.

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