Notes, summaries, assignments, exams, and problems for Medicine & Health

Invasive Ductal Carcinoma (IDC) Features

Invasive ductal carcinoma (IDC) is the most common form of breast cancer. Key pathological features include:

• Invasion: Cancer cells infiltrate the stroma, lacking a myoepithelial layer (confirmed by immunohistochemistry).
• Tumor Cells: Malignant cells characterized by pleomorphism, hyperchromatic nuclei, and mitotic activity.
• Tubule Formation: Varies by grade, ranging from Grade 1 (well-differentiated) to Grade 3 (poorly differentiated).
• Nuclear Grade: Low-grade tumors show small, uniform nuclei, while high-grade tumors exhibit large, irregular, hyperchromatic nuclei.
• Desmoplastic Stroma: Dense fibrous tissue surrounding tumor cells.
• Lymphovascular Invasion: Presence of tumor emboli in lymphatic or vascular

Anti-Inflammatory Agents: NSAIDs

Anti-inflammatory agents are a class of medicines designed to reduce pain, swelling, and fever without causing drowsiness. They are widely recognized as Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), commonly used for managing minor pain, edema, and tissue damage associated with inflammatory joint diseases.

Mechanism of Action

• NSAIDs primarily function by blocking cyclooxygenase (COX) enzymes. These enzymes are responsible for producing prostaglandins, which are compounds that promote inflammation, pain, and fever. By inhibiting COX enzymes, NSAIDs effectively reduce these symptoms.

Common NSAID Drugs

• Sodium Salicylate
• Aspirin
• Mefenamic Acid
• Meclofenamate
• Indomethacin
• Sulindac
• Tolmetin
• Zomepirac
• Diclofenac
• Ketorolac
• Ibuprofen
• Naproxen
• Piroxicam

Related

Heart Failure: Mechanism and Comprehensive Management

Defining Heart Failure (HF)

Heart failure (HF) is a clinical syndrome characterized by the heart's inability to pump sufficient blood to meet the metabolic needs of the body. It results from structural or functional cardiac disorders that impair the ability of the ventricles to fill with or eject blood.

Pathophysiology of Heart Failure

Classification of Heart Failure

Heart failure can be broadly classified based on the left ventricular ejection fraction (EF):

1. Systolic Heart Failure (HFrEF)

Also known as HF with reduced ejection fraction (HFrEF).

• The left ventricle loses its ability to contract normally, leading to decreased ejection of blood (EF < 40%).
• Common causes include: ischemic heart

Uveitis Signs and Symptoms

Anterior Uveitis

• Reduced visual acuity (VA)
• Ciliary injection/flush around the limbus
• Miosis due to pupillary sphincter spasm
• Formation of posterior synechiae
• Anterior chamber cells and flare
• 'Spillover' of cells into the vitreous
• Hypopyon (white blood cell collection)
• Keratic precipitates (large/greasy suggest systemic; small suggest AAU)

Intermediate Uveitis

• Cells and flare
• Scattered keratic precipitates
• Vitreous cell spillover
• Vitreous snowballs and snow banking (white cells seen on fundus)
• Neovascularization and cystoid macular edema (CMO)

Grading Systems

Cells (/1x1 mm)

• 0: <1 | 0.5+: 1–5 | 1+: 6–15 | 2+: 16–25 | 3+: 26–50 | 4+: >50

Flare

• 0: None | 1+: Faint | 2+: Moderate (iris/lens clear) | 3+: Marked (iris/lens hazy)

Nouns: From Old English to Middle English

Gender Evolution in Nouns

The shift from grammatical gender, as in Old English (OE), to natural gender was a significant change. OE had three genders (feminine, masculine, neuter). In Middle English (ME), there was a reclassification of originally masculine and feminine inanimate nouns as neuter.

Plural Markers and Inflectional Changes

• -as: A strong masculine noun ending in OE, which developed into the Present Day English (PDE) -s plural marker.
• -an: A weak noun ending in OE, which developed into the PDE -en plural marker (e.g., oxen).
• R-plurals: Developed into two markers: -en and -r.
• O/E Vowel Umlaut: A process of vowel change in the root.

In ME, five main plural markers emerged: zero, root vowel change (... Continue reading "English Grammar Evolution: Old to Middle English Transformations" »

Understanding English Future Tenses

Future Simple Tense

Structure: Will + Verb (Infinitive)

Uses of the Future Simple:

• Expressing a Prediction: 'It won't rain tomorrow.'
• Expressing Possible or Probable Actions: 'He will probably come back tomorrow.'
• Making Promises: 'I will not watch TV tonight. I promise.'
• Making a Decision at the Moment of Speaking: 'I think I'll have some tea, please.'

Signal Words for Future Simple:

in one year, next week / next month, tomorrow.

Future with Be Going To

Structure: Subject + Verb Be + Going To + Verb (Infinitive)

Uses of Be Going To:

• Expressing Intentions and Future Plans: 'I'm going to get slimmer.' (voy a adelgazar)
• Making Future Predictions Based on Present Evidence: 'The sky is absolutely dark. It is going to rain.

Understanding Your Prescription Label

1. Pharmacy Name and Address: Displayed at the top of the prescription label is the name and address of the pharmacy that filled the prescription.

2. Pharmacy Phone Number: Found near the pharmacy’s name and address.

3. Prescription Number: A key element of the label, needed to refill the prescription.

4. Prescribing Doctor and Fill Date: The doctor’s name appears on the label (location may vary), along with the date the prescription was filled, which can affect insurance coverage.

5. Patient’s Name: Clearly shows who the prescription is for; sometimes includes the patient’s address.

6. Directions for Taking the Drug: One of the most important parts of the prescription label. These instructions tell exactly... Continue reading "Mastering Pharmacy Labels and Essential Health Supplies" »

Respiratory System Basics

Respiratory Key Terms

• Dyspnea: Difficulty breathing
• Orthopnea: Difficulty breathing when lying flat
• Tachypnea: Abnormally fast breathing
• Bradypnea: Abnormally slow breathing
• Hemoptysis: Coughing up blood
• Hypoxia: Tissue oxygen deficiency
• Clubbing: Fingertip rounding due to chronic hypoxia
• Barrel chest: Increased chest diameter often from emphysema
• Cyanosis: Bluish skin or mucous membrane discoloration from low oxygen
• Rales/Crackles: Abnormal lung sounds indicating fluid
• Wheezing: High-pitched whistling from narrowed airways
• Rhonchi: Low-pitched rattling sounds (often due to secretions)
• Productive cough: Cough producing mucus or sputum
• Hypertonia: Increased muscle tone causing stiffness
• Hypotonia: Decreased muscle tone making muscles

Essential English Linking Words

To Start: First, once, once upon a time, to begin with, starting with, initially, from this point, last of all, at the end, in the end, finally, to finish.

Cause and Effect: Because, so, therefore, thus, consequently, hence, as a result.

To Add a Point: And, also, as well as, moreover, too, furthermore, additionally, in addition to, at the same time, again, equally importantly, in addition, above all, most of all, least of all, either...or, neither...nor, nevertheless, to continue, second, secondly, in the second place, next, the next time, then, after that, following that, subsequently, on the next occasion, so far, later on, third, in the third place, consequently.

Repetition: So briefly, in short, in fact, in... Continue reading "Essential English Linking Words, Phrasal Verbs, and Idioms" »